foundation/org.eclipse.persistence.core.test.framework/src/main/java/org/eclipse/persistence/testing/tests/performance/emulateddb/EmulatedStatement.java

/*
 * Copyright (c) 1998, 2021 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

// Contributors:
//     Oracle - initial API and implementation from Oracle TopLink
package org.eclipse.persistence.testing.tests.performance.emulateddb;

import java.sql.*;
import java.io.InputStream;
import java.io.Reader;
import java.math.*;
import java.util.*;

import org.eclipse.persistence.internal.helper.DatabaseField;
import org.eclipse.persistence.sessions.DatabaseRecord;

/**
 * Emulated database driver.
 */
public class EmulatedStatement implements PreparedStatement {
    protected EmulatedConnection connection;
    protected String sql;
    protected List parameters;
    protected int batch;

    public EmulatedStatement(EmulatedConnection connection) {
        this.connection = connection;
        this.parameters = new ArrayList();
    }

    public EmulatedStatement(String sql, EmulatedConnection connection) {
        this(connection);
        this.sql = sql;
    }

    /**
     * If the rows have not be fetched, fetch them from the database.
     */
    protected List fetchRows() throws SQLException {
        List rows = this.connection.getRows(this.sql);
        if (rows == null) {
            Connection realConnection = this.connection.getRealConnection();
            PreparedStatement statement = realConnection.prepareStatement(this.sql);
            for (int index = 0; index < this.parameters.size(); index++) {
                statement.setObject(index+1, this.parameters.get(index));
            }
            ResultSet result = statement.executeQuery();
            rows = new ArrayList();
            ResultSetMetaData metaData = result.getMetaData();
            while (result.next()) {
                DatabaseRecord row = new DatabaseRecord();
                for (int column = 0; column < metaData.getColumnCount(); column++) {
                    row.add(new DatabaseField(metaData.getColumnName(column+1)), result.getObject(column+1));
                }
                rows.add(row);
            }
            result.close();
            statement.close();
        }
        this.connection.putRows(this.sql, rows);
        return rows;
    }

    /**
     * Executes the SQL query in this <code>PreparedStatement</code> object
     * and returns the <code>ResultSet</code> object generated by the query.
     *
     * @return a <code>ResultSet</code> object that contains the data produced by the
     *         query; never <code>null</code>
     * @exception SQLException if a database access error occurs or the SQL
     *            statement does not return a <code>ResultSet</code> object
     */
    @Override
    public ResultSet executeQuery() throws SQLException {
        return new EmulatedResultSet(fetchRows());
    }

    /**
     * Executes the SQL statement in this <code>PreparedStatement</code> object,
     * which must be an SQL <code>INSERT</code>, <code>UPDATE</code> or
     * <code>DELETE</code> statement; or an SQL statement that returns nothing,
     * such as a DDL statement.
     *
     * @return either (1) the row count for <code>INSERT</code>, <code>UPDATE</code>,
     *         or <code>DELETE</code> statements
     *         or (2) 0 for SQL statements that return nothing
     * @exception SQLException if a database access error occurs or the SQL
     *            statement returns a <code>ResultSet</code> object
     */
    @Override
    public int executeUpdate() throws SQLException {
        return 1;
    }

    /**
     * Sets the designated parameter to SQL <code>NULL</code>.
     *
     * <P><B>Note:</B> You must specify the parameter's SQL type.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param sqlType the SQL type code defined in <code>java.sql.Types</code>
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setNull(int parameterIndex, int sqlType) throws SQLException {
        setObject(parameterIndex, null);
    }

    /**
     * Sets the designated parameter to the given Java <code>boolean</code> value.
     * The driver converts this
     * to an SQL <code>BIT</code> value when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setBoolean(int parameterIndex, boolean x) throws SQLException {
    }

    /**
     * Sets the designated parameter to the given Java <code>byte</code> value.
     * The driver converts this
     * to an SQL <code>TINYINT</code> value when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setByte(int parameterIndex, byte x) throws SQLException {
    }

    /**
     * Sets the designated parameter to the given Java <code>short</code> value.
     * The driver converts this
     * to an SQL <code>SMALLINT</code> value when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setShort(int parameterIndex, short x) throws SQLException {
    }

    /**
     * Sets the designated parameter to the given Java <code>int</code> value.
     * The driver converts this
     * to an SQL <code>INTEGER</code> value when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setInt(int parameterIndex, int x) throws SQLException {
        setObject(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given Java <code>long</code> value.
     * The driver converts this
     * to an SQL <code>BIGINT</code> value when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setLong(int parameterIndex, long x) throws SQLException {
        setObject(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given Java <code>float</code> value.
     * The driver converts this
     * to an SQL <code>FLOAT</code> value when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setFloat(int parameterIndex, float x) throws SQLException {
        setObject(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given Java <code>double</code> value.
     * The driver converts this
     * to an SQL <code>DOUBLE</code> value when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setDouble(int parameterIndex, double x) throws SQLException {
        setObject(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given <code>java.math.BigDecimal</code> value.
     * The driver converts this to an SQL <code>NUMERIC</code> value when
     * it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setBigDecimal(int parameterIndex, BigDecimal x) throws SQLException {
    }

    /**
     * Sets the designated parameter to the given Java <code>String</code> value.
     * The driver converts this
     * to an SQL <code>VARCHAR</code> or <code>LONGVARCHAR</code> value
     * (depending on the argument's
     * size relative to the driver's limits on <code>VARCHAR</code> values)
     * when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setString(int parameterIndex, String x) throws SQLException {
        setObject(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given Java array of bytes.  The driver converts
     * this to an SQL <code>VARBINARY</code> or <code>LONGVARBINARY</code>
     * (depending on the argument's size relative to the driver's limits on
     * <code>VARBINARY</code> values) when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setBytes(int parameterIndex, byte[] x) throws SQLException {
        setObject(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given <code>java.sql.Date</code> value.
     * The driver converts this
     * to an SQL <code>DATE</code> value when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setDate(int parameterIndex, java.sql.Date x) throws SQLException {
        setObject(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given <code>java.sql.Time</code> value.
     * The driver converts this
     * to an SQL <code>TIME</code> value when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setTime(int parameterIndex, java.sql.Time x) throws SQLException {
        setObject(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given <code>java.sql.Timestamp</code> value.
     * The driver
     * converts this to an SQL <code>TIMESTAMP</code> value when it sends it to the
     * database.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setTimestamp(int parameterIndex, java.sql.Timestamp x) throws SQLException {
        setObject(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given input stream, which will have
     * the specified number of bytes.
     * When a very large ASCII value is input to a <code>LONGVARCHAR</code>
     * parameter, it may be more practical to send it via a
     * <code>java.io.InputStream</code>. Data will be read from the stream
     * as needed until end-of-file is reached.  The JDBC driver will
     * do any necessary conversion from ASCII to the database char format.
     *
     * <P><B>Note:</B> This stream object can either be a standard
     * Java stream object or your own subclass that implements the
     * standard interface.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the Java input stream that contains the ASCII parameter value
     * @param length the number of bytes in the stream
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setAsciiStream(int parameterIndex, java.io.InputStream x, int length) throws SQLException {
    }

    /**
     * Sets the designated parameter to the given input stream, which
     * will have the specified number of bytes. A Unicode character has
     * two bytes, with the first byte being the high byte, and the second
     * being the low byte.
     *
     * When a very large Unicode value is input to a <code>LONGVARCHAR</code>
     * parameter, it may be more practical to send it via a
     * <code>java.io.InputStream</code> object. The data will be read from the
     * stream as needed until end-of-file is reached.  The JDBC driver will
     * do any necessary conversion from Unicode to the database char format.
     *
     * <P><B>Note:</B> This stream object can either be a standard
     * Java stream object or your own subclass that implements the
     * standard interface.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x a <code>java.io.InputStream</code> object that contains the
     *        Unicode parameter value as two-byte Unicode characters
     * @param length the number of bytes in the stream
     * @exception SQLException if a database access error occurs
     * @deprecated
     */
    @Override
    @Deprecated
    public void setUnicodeStream(int parameterIndex, java.io.InputStream x, int length) throws SQLException {
    }

    /**
     * Sets the designated parameter to the given input stream, which will have
     * the specified number of bytes.
     * When a very large binary value is input to a <code>LONGVARBINARY</code>
     * parameter, it may be more practical to send it via a
     * <code>java.io.InputStream</code> object. The data will be read from the
     * stream as needed until end-of-file is reached.
     *
     * <P><B>Note:</B> This stream object can either be a standard
     * Java stream object or your own subclass that implements the
     * standard interface.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the java input stream which contains the binary parameter value
     * @param length the number of bytes in the stream
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setBinaryStream(int parameterIndex, java.io.InputStream x, int length) throws SQLException {
    }

    /**
     * Clears the current parameter values immediately.
     * <P>In general, parameter values remain in force for repeated use of a
     * statement. Setting a parameter value automatically clears its
     * previous value.  However, in some cases it is useful to immediately
     * release the resources used by the current parameter values; this can
     * be done by calling the method <code>clearParameters</code>.
     *
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void clearParameters() throws SQLException {
    }

    //----------------------------------------------------------------------
    // Advanced features:

    /**
     * <p>Sets the value of the designated parameter with the given object. The second
     * argument must be an object type; for integral values, the
     * <code>java.lang</code> equivalent objects should be used.
     *
     * <p>The given Java object will be converted to the given targetSqlType
     * before being sent to the database.
     *
     * If the object has a custom mapping (is of a class implementing the
     * interface <code>SQLData</code>),
     * the JDBC driver should call the method <code>SQLData.writeSQL</code> to
     * write it to the SQL data stream.
     * If, on the other hand, the object is of a class implementing
     * <code>Ref</code>, <code>Blob</code>, <code>Clob</code>, <code>Struct</code>,
     * or <code>Array</code>, the driver should pass it to the database as a
     * value of the corresponding SQL type.
     *
     * <p>Note that this method may be used to pass database-specific
     * abstract data types.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the object containing the input parameter value
     * @param targetSqlType the SQL type (as defined in java.sql.Types) to be
     * sent to the database. The scale argument may further qualify this type.
     * @param scale for java.sql.Types.DECIMAL or java.sql.Types.NUMERIC types,
     *          this is the number of digits after the decimal point.  For all other
     *          types, this value will be ignored.
     * @exception SQLException if a database access error occurs
     * @see Types
     */
    @Override
    public void setObject(int parameterIndex, Object x, int targetSqlType, int scale) throws SQLException {
        setObject(parameterIndex, x);
    }

    /**
    * Sets the value of the designated parameter with the given object.
    * This method is like the method <code>setObject</code>
    * above, except that it assumes a scale of zero.
    *
    * @param parameterIndex the first parameter is 1, the second is 2, ...
    * @param x the object containing the input parameter value
    * @param targetSqlType the SQL type (as defined in java.sql.Types) to be
    *                      sent to the database
    * @exception SQLException if a database access error occurs
    */
    @Override
    public void setObject(int parameterIndex, Object x, int targetSqlType) throws SQLException {
        setObject(parameterIndex, x);
    }

    /**
     * <p>Sets the value of the designated parameter using the given object.
     * The second parameter must be of type <code>Object</code>; therefore, the
     * <code>java.lang</code> equivalent objects should be used for built-in types.
     *
     * <p>The JDBC specification specifies a standard mapping from
     * Java <code>Object</code> types to SQL types.  The given argument
     * will be converted to the corresponding SQL type before being
     * sent to the database.
     *
     * <p>Note that this method may be used to pass datatabase-
     * specific abstract data types, by using a driver-specific Java
     * type.
     *
     * If the object is of a class implementing the interface <code>SQLData</code>,
     * the JDBC driver should call the method <code>SQLData.writeSQL</code>
     * to write it to the SQL data stream.
     * If, on the other hand, the object is of a class implementing
     * <code>Ref</code>, <code>Blob</code>, <code>Clob</code>, <code>Struct</code>,
     * or <code>Array</code>, the driver should pass it to the database as a
     * value of the corresponding SQL type.
     * <P>
     * This method throws an exception if there is an ambiguity, for example, if the
     * object is of a class implementing more than one of the interfaces named above.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the object containing the input parameter value
     * @exception SQLException if a database access error occurs or the type
     *            of the given object is ambiguous
     */
    @Override
    public void setObject(int parameterIndex, Object x) throws SQLException {
        while (this.parameters.size() < parameterIndex) {
            this.parameters.add(null);
        }
        this.parameters.set(parameterIndex-1, x);
    }

    /**
     * Executes the SQL statement in this <code>PreparedStatement</code> object,
     * which may be any kind of SQL statement.
     * Some prepared statements return multiple results; the <code>execute</code>
     * method handles these complex statements as well as the simpler
     * form of statements handled by the methods <code>executeQuery</code>
     * and <code>executeUpdate</code>.
     * <P>
     * The <code>execute</code> method returns a <code>boolean</code> to
     * indicate the form of the first result.  You must call either the method
     * <code>getResultSet</code> or <code>getUpdateCount</code>
     * to retrieve the result; you must call <code>getMoreResults</code> to
     * move to any subsequent result(s).
     *
     * @return <code>true</code> if the first result is a <code>ResultSet</code>
     *         object; <code>false</code> if the first result is an update
     *         count or there is no result
     * @exception SQLException if a database access error occurs or an argument
     *            is supplied to this method
     * @see Statement#execute
     * @see Statement#getResultSet
     * @see Statement#getUpdateCount
     * @see Statement#getMoreResults

     */
    @Override
    public boolean execute() throws SQLException{
        return true;
    }

    //--------------------------JDBC 2.0-----------------------------

    /**
     * Adds a set of parameters to this <code>PreparedStatement</code>
     * object's batch of commands.
     *
     * @exception SQLException if a database access error occurs
     * @see Statement#addBatch
     * @since 1.2
     */
    @Override
    public void addBatch() throws SQLException {
        this.batch++;
    }

    /**
     * Sets the designated parameter to the given <code>Reader</code>
     * object, which is the given number of characters long.
     * When a very large UNICODE value is input to a <code>LONGVARCHAR</code>
     * parameter, it may be more practical to send it via a
     * <code>java.io.Reader</code> object. The data will be read from the stream
     * as needed until end-of-file is reached.  The JDBC driver will
     * do any necessary conversion from UNICODE to the database char format.
     *
     * <P><B>Note:</B> This stream object can either be a standard
     * Java stream object or your own subclass that implements the
     * standard interface.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param reader the <code>java.io.Reader</code> object that contains the
     *        Unicode data
     * @param length the number of characters in the stream
     * @exception SQLException if a database access error occurs
     * @since 1.2
     */
    @Override
    public void setCharacterStream(int parameterIndex, java.io.Reader reader, int length) throws SQLException {
    }

    /**
     * Sets the designated parameter to the given
     *  <code>REF(&lt;structured-type&gt;)</code> value.
     * The driver converts this to an SQL <code>REF</code> value when it
     * sends it to the database.
     *
     * @param i the first parameter is 1, the second is 2, ...
     * @param x an SQL <code>REF</code> value
     * @exception SQLException if a database access error occurs
     * @since 1.2
     */
    @Override
    public void setRef(int i, Ref x) throws SQLException {
    }

    /**
     * Sets the designated parameter to the given <code>Blob</code> object.
     * The driver converts this to an SQL <code>BLOB</code> value when it
     * sends it to the database.
     *
     * @param i the first parameter is 1, the second is 2, ...
     * @param x a <code>Blob</code> object that maps an SQL <code>BLOB</code> value
     * @exception SQLException if a database access error occurs
     * @since 1.2
     */
    @Override
    public void setBlob(int i, Blob x) throws SQLException {
        setObject(i, x);
    }

    /**
     * Sets the designated parameter to the given <code>Clob</code> object.
     * The driver converts this to an SQL <code>CLOB</code> value when it
     * sends it to the database.
     *
     * @param i the first parameter is 1, the second is 2, ...
     * @param x a <code>Clob</code> object that maps an SQL <code>CLOB</code> value
     * @exception SQLException if a database access error occurs
     * @since 1.2
     */
    @Override
    public void setClob(int i, Clob x) throws SQLException {
        setObject(i, x);
    }

    /**
     * Sets the designated parameter to the given <code>Array</code> object.
     * The driver converts this to an SQL <code>ARRAY</code> value when it
     * sends it to the database.
     *
     * @param i the first parameter is 1, the second is 2, ...
     * @param x an <code>Array</code> object that maps an SQL <code>ARRAY</code> value
     * @exception SQLException if a database access error occurs
     * @since 1.2
     */
    @Override
    public void setArray(int i, Array x) throws SQLException {
        setObject(i, x);
    }

    /**
     * Retrieves a <code>ResultSetMetaData</code> object that contains
     * information about the columns of the <code>ResultSet</code> object
     * that will be returned when this <code>PreparedStatement</code> object
     * is executed.
     * <P>
     * Because a <code>PreparedStatement</code> object is precompiled, it is
     * possible to know about the <code>ResultSet</code> object that it will
     * return without having to execute it.  Consequently, it is possible
     * to invoke the method <code>getMetaData</code> on a
     * <code>PreparedStatement</code> object rather than waiting to execute
     * it and then invoking the <code>ResultSet.getMetaData</code> method
     * on the <code>ResultSet</code> object that is returned.
     * <P>
     * <B>NOTE:</B> Using this method may be expensive for some drivers due
     * to the lack of underlying DBMS support.
     *
     * @return the description of a <code>ResultSet</code> object's columns or
     *         <code>null</code> if the driver cannot return a
     *         <code>ResultSetMetaData</code> object
     * @exception SQLException if a database access error occurs
     * @since 1.2
     */
    @Override
    public ResultSetMetaData getMetaData() throws SQLException {
        return null;
    }

    /**
     * Sets the designated parameter to the given <code>java.sql.Date</code> value,
     * using the given <code>Calendar</code> object.  The driver uses
     * the <code>Calendar</code> object to construct an SQL <code>DATE</code> value,
     * which the driver then sends to the database.  With
     * a <code>Calendar</code> object, the driver can calculate the date
     * taking into account a custom timezone.  If no
     * <code>Calendar</code> object is specified, the driver uses the default
     * timezone, which is that of the virtual machine running the application.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @param cal the <code>Calendar</code> object the driver will use
     *            to construct the date
     * @exception SQLException if a database access error occurs
     * @since 1.2
     */
    @Override
    public void setDate(int parameterIndex, java.sql.Date x, Calendar cal) throws SQLException {
        setObject(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given <code>java.sql.Time</code> value,
     * using the given <code>Calendar</code> object.  The driver uses
     * the <code>Calendar</code> object to construct an SQL <code>TIME</code> value,
     * which the driver then sends to the database.  With
     * a <code>Calendar</code> object, the driver can calculate the time
     * taking into account a custom timezone.  If no
     * <code>Calendar</code> object is specified, the driver uses the default
     * timezone, which is that of the virtual machine running the application.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @param cal the <code>Calendar</code> object the driver will use
     *            to construct the time
     * @exception SQLException if a database access error occurs
     * @since 1.2
     */
    @Override
    public void setTime(int parameterIndex, java.sql.Time x, Calendar cal) throws SQLException {
        setObject(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to the given <code>java.sql.Timestamp</code> value,
     * using the given <code>Calendar</code> object.  The driver uses
     * the <code>Calendar</code> object to construct an SQL <code>TIMESTAMP</code> value,
     * which the driver then sends to the database.  With a
     *  <code>Calendar</code> object, the driver can calculate the timestamp
     * taking into account a custom timezone.  If no
     * <code>Calendar</code> object is specified, the driver uses the default
     * timezone, which is that of the virtual machine running the application.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the parameter value
     * @param cal the <code>Calendar</code> object the driver will use
     *            to construct the timestamp
     * @exception SQLException if a database access error occurs
     * @since 1.2
     */
    @Override
    public void setTimestamp(int parameterIndex, java.sql.Timestamp x, Calendar cal) throws SQLException {
        setObject(parameterIndex, x);
    }

    /**
     * Sets the designated parameter to SQL <code>NULL</code>.
     * This version of the method <code>setNull</code> should
     * be used for user-defined types and REF type parameters.  Examples
     * of user-defined types include: STRUCT, DISTINCT, JAVA_OBJECT, and
     * named array types.
     *
     * <P><B>Note:</B> To be portable, applications must give the
     * SQL type code and the fully-qualified SQL type name when specifying
     * a NULL user-defined or REF parameter.  In the case of a user-defined type
     * the name is the type name of the parameter itself.  For a REF
     * parameter, the name is the type name of the referenced type.  If
     * a JDBC driver does not need the type code or type name information,
     * it may ignore it.
     *
     * Although it is intended for user-defined and Ref parameters,
     * this method may be used to set a null parameter of any JDBC type.
     * If the parameter does not have a user-defined or REF type, the given
     * typeName is ignored.
     *
     *
     * @param paramIndex the first parameter is 1, the second is 2, ...
     * @param sqlType a value from <code>java.sql.Types</code>
     * @param typeName the fully-qualified name of an SQL user-defined type;
     *  ignored if the parameter is not a user-defined type or REF
     * @exception SQLException if a database access error occurs
     * @since 1.2
     */
    @Override
    public void setNull(int paramIndex, int sqlType, String typeName) throws SQLException {
        setObject(paramIndex, null);
    }

    //------------------------- JDBC 3.0 -----------------------------------

    /**
     * Sets the designated parameter to the given <code>java.net.URL</code> value.
     * The driver converts this to an SQL <code>DATALINK</code> value
     * when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1, the second is 2, ...
     * @param x the <code>java.net.URL</code> object to be set
     * @exception SQLException if a database access error occurs
     * @since 1.4
     */
    @Override
    public void setURL(int parameterIndex, java.net.URL x) throws SQLException {
    }

    /**
     * Retrieves the number, types and properties of this
     * <code>PreparedStatement</code> object's parameters.
     *
     * @return a <code>ParameterMetaData</code> object that contains information
     *         about the number, types and properties of this
     *         <code>PreparedStatement</code> object's parameters
     * @exception SQLException if a database access error occurs
     * @see ParameterMetaData
     * @since 1.4
     */
    @Override
    public ParameterMetaData getParameterMetaData() throws SQLException {
        return null;
    }

    /**
     * Executes the given SQL statement, which returns a single
     * <code>ResultSet</code> object.
     *
     * @param sql an SQL statement to be sent to the database, typically a
     *        static SQL <code>SELECT</code> statement
     * @return a <code>ResultSet</code> object that contains the data produced
     *         by the given query; never <code>null</code>
     * @exception SQLException if a database access error occurs or the given
     *            SQL statement produces anything other than a single
     *            <code>ResultSet</code> object
     */
    @Override
    public ResultSet executeQuery(String sql) throws SQLException {
        return new EmulatedResultSet(this.connection.getRows(sql));
    }

    /**
     * Executes the given SQL statement, which may be an <code>INSERT</code>,
     * <code>UPDATE</code>, or <code>DELETE</code> statement or an
     * SQL statement that returns nothing, such as an SQL DDL statement.
     *
     * @param sql an SQL <code>INSERT</code>, <code>UPDATE</code> or
     * <code>DELETE</code> statement or an SQL statement that returns nothing
     * @return either the row count for <code>INSERT</code>, <code>UPDATE</code>
     * or <code>DELETE</code> statements, or <code>0</code> for SQL statements
     * that return nothing
     * @exception SQLException if a database access error occurs or the given
     *            SQL statement produces a <code>ResultSet</code> object
     */
    @Override
    public int executeUpdate(String sql) throws SQLException {
        return 1;
    }

    /**
     * Releases this <code>Statement</code> object's database
     * and JDBC resources immediately instead of waiting for
     * this to happen when it is automatically closed.
     * It is generally good practice to release resources as soon as
     * you are finished with them to avoid tying up database
     * resources.
     * <P>
     * Calling the method <code>close</code> on a <code>Statement</code>
     * object that is already closed has no effect.
     * <P>
     * <B>Note:</B> A <code>Statement</code> object is automatically closed
     * when it is garbage collected. When a <code>Statement</code> object is
     * closed, its current <code>ResultSet</code> object, if one exists, is
     * also closed.
     *
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void close() throws SQLException {
    }

    //----------------------------------------------------------------------

    /**
     * Retrieves the maximum number of bytes that can be
     * returned for character and binary column values in a <code>ResultSet</code>
     * object produced by this <code>Statement</code> object.
     * This limit applies only to <code>BINARY</code>,
     * <code>VARBINARY</code>, <code>LONGVARBINARY</code>, <code>CHAR</code>,
     * <code>VARCHAR</code>, and <code>LONGVARCHAR</code>
     * columns.  If the limit is exceeded, the excess data is silently
     * discarded.
     *
     * @return the current column size limit for columns storing character and
     *         binary values; zero means there is no limit
     * @exception SQLException if a database access error occurs
     * @see #setMaxFieldSize
     */
    @Override
    public int getMaxFieldSize() throws SQLException {
        return 0;
    }

    /**
     * Sets the limit for the maximum number of bytes in a <code>ResultSet</code>
     * column storing character or binary values to
     * the given number of bytes.  This limit applies
     * only to <code>BINARY</code>, <code>VARBINARY</code>,
     * <code>LONGVARBINARY</code>, <code>CHAR</code>, <code>VARCHAR</code>, and
     * <code>LONGVARCHAR</code> fields.  If the limit is exceeded, the excess data
     * is silently discarded. For maximum portability, use values
     * greater than 256.
     *
     * @param max the new column size limit in bytes; zero means there is no limit
     * @exception SQLException if a database access error occurs
     *            or the condition max &gt;= 0 is not satisfied
     * @see #getMaxFieldSize
     */
    @Override
    public void setMaxFieldSize(int max) throws SQLException {
    }

    /**
     * Retrieves the maximum number of rows that a
     * <code>ResultSet</code> object produced by this
     * <code>Statement</code> object can contain.  If this limit is exceeded,
     * the excess rows are silently dropped.
     *
     * @return the current maximum number of rows for a <code>ResultSet</code>
     *         object produced by this <code>Statement</code> object;
     *         zero means there is no limit
     * @exception SQLException if a database access error occurs
     * @see #setMaxRows
     */
    @Override
    public int getMaxRows() throws SQLException {
        return 0;
    }

    /**
     * Sets the limit for the maximum number of rows that any
     * <code>ResultSet</code> object can contain to the given number.
     * If the limit is exceeded, the excess
     * rows are silently dropped.
     *
     * @param max the new max rows limit; zero means there is no limit
     * @exception SQLException if a database access error occurs
     *            or the condition max &gt;= 0 is not satisfied
     * @see #getMaxRows
     */
    @Override
    public void setMaxRows(int max) throws SQLException {
    }

    /**
     * Sets escape processing on or off.
     * If escape scanning is on (the default), the driver will do
     * escape substitution before sending the SQL statement to the database.
     *
     * Note: Since prepared statements have usually been parsed prior
     * to making this call, disabling escape processing for
     * <code>PreparedStatements</code> objects will have no effect.
     *
     * @param enable <code>true</code> to enable escape processing;
     *       <code>false</code> to disable it
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setEscapeProcessing(boolean enable) throws SQLException {
    }

    /**
     * Retrieves the number of seconds the driver will
     * wait for a <code>Statement</code> object to execute. If the limit is exceeded, a
     * <code>SQLException</code> is thrown.
     *
     * @return the current query timeout limit in seconds; zero means there is
     *         no limit
     * @exception SQLException if a database access error occurs
     * @see #setQueryTimeout
     */
    @Override
    public int getQueryTimeout() throws SQLException {
        return 0;
    }

    /**
     * Sets the number of seconds the driver will wait for a
     * <code>Statement</code> object to execute to the given number of seconds.
     * If the limit is exceeded, an <code>SQLException</code> is thrown.
     *
     * @param seconds the new query timeout limit in seconds; zero means
     *        there is no limit
     * @exception SQLException if a database access error occurs
     *            or the condition seconds &gt;= 0 is not satisfied
     * @see #getQueryTimeout
     */
    @Override
    public void setQueryTimeout(int seconds) throws SQLException {
    }

    /**
     * Cancels this <code>Statement</code> object if both the DBMS and
     * driver support aborting an SQL statement.
     * This method can be used by one thread to cancel a statement that
     * is being executed by another thread.
     *
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void cancel() throws SQLException {
    }

    /**
     * Retrieves the first warning reported by calls on this <code>Statement</code> object.
     * Subsequent <code>Statement</code> object warnings will be chained to this
     * <code>SQLWarning</code> object.
     *
     * <p>The warning chain is automatically cleared each time
     * a statement is (re)executed. This method may not be called on a closed
     * <code>Statement</code> object; doing so will cause an <code>SQLException</code>
     * to be thrown.
     *
     * <P><B>Note:</B> If you are processing a <code>ResultSet</code> object, any
     * warnings associated with reads on that <code>ResultSet</code> object
     * will be chained on it rather than on the <code>Statement</code>
     * object that produced it.
     *
     * @return the first <code>SQLWarning</code> object or <code>null</code>
     *         if there are no warnings
     * @exception SQLException if a database access error occurs or this
     *            method is called on a closed statement
     */
    @Override
    public SQLWarning getWarnings() throws SQLException {
        return null;
    }

    /**
     * Clears all the warnings reported on this <code>Statement</code>
     * object. After a call to this method,
     * the method <code>getWarnings</code> will return
     * <code>null</code> until a new warning is reported for this
     * <code>Statement</code> object.
     *
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void clearWarnings() throws SQLException {
    }

    /**
     * Sets the SQL cursor name to the given <code>String</code>, which
     * will be used by subsequent <code>Statement</code> object
     * <code>execute</code> methods. This name can then be
     * used in SQL positioned update or delete statements to identify the
     * current row in the <code>ResultSet</code> object generated by this
     * statement.  If the database does not support positioned update/delete,
     * this method is a noop.  To insure that a cursor has the proper isolation
     * level to support updates, the cursor's <code>SELECT</code> statement
     * should have the form <code>SELECT FOR UPDATE</code>.  If
     * <code>FOR UPDATE</code> is not present, positioned updates may fail.
     *
     * <P><B>Note:</B> By definition, the execution of positioned updates and
     * deletes must be done by a different <code>Statement</code> object than
     * the one that generated the <code>ResultSet</code> object being used for
     * positioning. Also, cursor names must be unique within a connection.
     *
     * @param name the new cursor name, which must be unique within
     *             a connection
     * @exception SQLException if a database access error occurs
     */
    @Override
    public void setCursorName(String name) throws SQLException {
    }

    //----------------------- Multiple Results --------------------------

    /**
     * Executes the given SQL statement, which may return multiple results.
     * In some (uncommon) situations, a single SQL statement may return
     * multiple result sets and/or update counts.  Normally you can ignore
     * this unless you are (1) executing a stored procedure that you know may
     * return multiple results or (2) you are dynamically executing an
     * unknown SQL string.
     * <P>
     * The <code>execute</code> method executes an SQL statement and indicates the
     * form of the first result.  You must then use the methods
     * <code>getResultSet</code> or <code>getUpdateCount</code>
     * to retrieve the result, and <code>getMoreResults</code> to
     * move to any subsequent result(s).
     *
     * @param sql any SQL statement
     * @return <code>true</code> if the first result is a <code>ResultSet</code>
     *         object; <code>false</code> if it is an update count or there are
     *         no results
     * @exception SQLException if a database access error occurs
     * @see #getResultSet
     * @see #getUpdateCount
     * @see #getMoreResults
     */
    @Override
    public boolean execute(String sql) throws SQLException {
        return true;
    }

    /**
     *  Retrieves the current result as a <code>ResultSet</code> object.
     *  This method should be called only once per result.
     *
     * @return the current result as a <code>ResultSet</code> object or
     * <code>null</code> if the result is an update count or there are no more results
     * @exception SQLException if a database access error occurs
     * @see #execute
     */
    @Override
    public ResultSet getResultSet() throws SQLException {
        return null;
    }

    /**
     *  Retrieves the current result as an update count;
     *  if the result is a <code>ResultSet</code> object or there are no more results, -1
     *  is returned. This method should be called only once per result.
     *
     * @return the current result as an update count; -1 if the current result is a
     * <code>ResultSet</code> object or there are no more results
     * @exception SQLException if a database access error occurs
     * @see #execute
     */
    @Override
    public int getUpdateCount() throws SQLException {
        return 0;
    }

    /**
     * Moves to this <code>Statement</code> object's next result, returns
     * <code>true</code> if it is a <code>ResultSet</code> object, and
     * implicitly closes any current <code>ResultSet</code>
     * object(s) obtained with the method <code>getResultSet</code>.
     *
     * <P>There are no more results when the following is true:
     * <PRE>
     *     // stmt is a Statement object
     *     ((stmt.getMoreResults() == false) &amp;&amp; (stmt.getUpdateCount() == -1))
     * </PRE>
     *
     * @return <code>true</code> if the next result is a <code>ResultSet</code>
     *         object; <code>false</code> if it is an update count or there are
     *         no more results
     * @exception SQLException if a database access error occurs
     * @see #execute
     */
    @Override
    public boolean getMoreResults() throws SQLException {
        return false;
    }

    //--------------------------JDBC 2.0-----------------------------

    /**
     * Gives the driver a hint as to the direction in which
     * rows will be processed in <code>ResultSet</code>
     * objects created using this <code>Statement</code> object.  The
     * default value is <code>ResultSet.FETCH_FORWARD</code>.
     * <P>
     * Note that this method sets the default fetch direction for
     * result sets generated by this <code>Statement</code> object.
     * Each result set has its own methods for getting and setting
     * its own fetch direction.
     *
     * @param direction the initial direction for processing rows
     * @exception SQLException if a database access error occurs
     * or the given direction
     * is not one of <code>ResultSet.FETCH_FORWARD</code>,
     * <code>ResultSet.FETCH_REVERSE</code>, or <code>ResultSet.FETCH_UNKNOWN</code>
     * @since 1.2
     * @see #getFetchDirection
     */
    @Override
    public void setFetchDirection(int direction) throws SQLException {
    }

    /**
     * Retrieves the direction for fetching rows from
     * database tables that is the default for result sets
     * generated from this <code>Statement</code> object.
     * If this <code>Statement</code> object has not set
     * a fetch direction by calling the method <code>setFetchDirection</code>,
     * the return value is implementation-specific.
     *
     * @return the default fetch direction for result sets generated
     *          from this <code>Statement</code> object
     * @exception SQLException if a database access error occurs
     * @since 1.2
     * @see #setFetchDirection
     */
    @Override
    public int getFetchDirection() throws SQLException {
        return 0;
    }

    /**
     * Gives the JDBC driver a hint as to the number of rows that should
     * be fetched from the database when more rows are needed.  The number
     * of rows specified affects only result sets created using this
     * statement. If the value specified is zero, then the hint is ignored.
     * The default value is zero.
     *
     * @param rows the number of rows to fetch
     * @exception SQLException if a database access error occurs, or the
     *        condition 0 &lt;= <code>rows</code> &lt;= <code>this.getMaxRows()</code>
     *        is not satisfied.
     * @since 1.2
     * @see #getFetchSize
     */
    @Override
    public void setFetchSize(int rows) throws SQLException {
    }

    /**
     * Retrieves the number of result set rows that is the default
     * fetch size for <code>ResultSet</code> objects
     * generated from this <code>Statement</code> object.
     * If this <code>Statement</code> object has not set
     * a fetch size by calling the method <code>setFetchSize</code>,
     * the return value is implementation-specific.
     *
     * @return the default fetch size for result sets generated
     *          from this <code>Statement</code> object
     * @exception SQLException if a database access error occurs
     * @since 1.2
     * @see #setFetchSize
     */
    @Override
    public int getFetchSize() throws SQLException {
        return 0;
    }

    /**
     * Retrieves the result set concurrency for <code>ResultSet</code> objects
     * generated by this <code>Statement</code> object.
     *
     * @return either <code>ResultSet.CONCUR_READ_ONLY</code> or
     * <code>ResultSet.CONCUR_UPDATABLE</code>
     * @exception SQLException if a database access error occurs
     * @since 1.2
     */
    @Override
    public int getResultSetConcurrency() throws SQLException {
        return 0;
    }

    /**
     * Retrieves the result set type for <code>ResultSet</code> objects
     * generated by this <code>Statement</code> object.
     *
     * @return one of <code>ResultSet.TYPE_FORWARD_ONLY</code>,
     * <code>ResultSet.TYPE_SCROLL_INSENSITIVE</code>, or
     * <code>ResultSet.TYPE_SCROLL_SENSITIVE</code>
     * @exception SQLException if a database access error occurs
     * @since 1.2
     */
    @Override
    public int getResultSetType() throws SQLException {
        return 0;
    }

    /**
     * Adds the given SQL command to the current list of commmands for this
     * <code>Statement</code> object. The commands in this list can be
     * executed as a batch by calling the method <code>executeBatch</code>.
     * <P>
     * <B>NOTE:</B>  This method is optional.
     *
     * @param sql typically this is a static SQL <code>INSERT</code> or
     * <code>UPDATE</code> statement
     * @exception SQLException if a database access error occurs, or the
     * driver does not support batch updates
     * @see #executeBatch
     * @since 1.2
     */
    @Override
    public void addBatch(String sql) throws SQLException {
    }

    /**
     * Empties this <code>Statement</code> object's current list of
     * SQL commands.
     * <P>
     * <B>NOTE:</B>  This method is optional.
     *
     * @exception SQLException if a database access error occurs or the
     * driver does not support batch updates
     * @see #addBatch
     * @since 1.2
     */
    @Override
    public void clearBatch() throws SQLException {
    }

    /**
     * Submits a batch of commands to the database for execution and
     * if all commands execute successfully, returns an array of update counts.
     * The <code>int</code> elements of the array that is returned are ordered
     * to correspond to the commands in the batch, which are ordered
     * according to the order in which they were added to the batch.
     * The elements in the array returned by the method <code>executeBatch</code>
     * may be one of the following:
     * <OL>
     * <LI>A number greater than or equal to zero -- indicates that the
     * command was processed successfully and is an update count giving the
     * number of rows in the database that were affected by the command's
     * execution
     * <LI>A value of <code>SUCCESS_NO_INFO</code> -- indicates that the command was
     * processed successfully but that the number of rows affected is
     * unknown
     * <P>
     * If one of the commands in a batch update fails to execute properly,
     * this method throws a <code>BatchUpdateException</code>, and a JDBC
     * driver may or may not continue to process the remaining commands in
     * the batch.  However, the driver's behavior must be consistent with a
     * particular DBMS, either always continuing to process commands or never
     * continuing to process commands.  If the driver continues processing
     * after a failure, the array returned by the method
     * <code>BatchUpdateException.getUpdateCounts</code>
     * will contain as many elements as there are commands in the batch, and
     * at least one of the elements will be the following:
     * <LI>A value of <code>EXECUTE_FAILED</code> -- indicates that the command failed
     * to execute successfully and occurs only if a driver continues to
     * process commands after a command fails
     * </OL>
     * <P>
     * A driver is not required to implement this method.
     * The possible implementations and return values have been modified in
     * the Java 2 SDK, Standard Edition, version 1.3 to
     * accommodate the option of continuing to proccess commands in a batch
     * update after a <code>BatchUpdateException</code> obejct has been thrown.
     *
     * @return an array of update counts containing one element for each
     * command in the batch.  The elements of the array are ordered according
     * to the order in which commands were added to the batch.
     * @exception SQLException if a database access error occurs or the
     * driver does not support batch statements. Throws {@link BatchUpdateException}
     * (a subclass of <code>SQLException</code>) if one of the commands sent to the
     * database fails to execute properly or attempts to return a result set.
     * @since 1.3
     */
    @Override
    public int[] executeBatch() throws SQLException {
        int result[] = new int[this.batch];
        for (int index = 0; index < this.batch; index++) {
            result[index] = 1;
        }
        this.batch = 0;
        return result;
    }

    /**
     * Retrieves the <code>Connection</code> object
     * that produced this <code>Statement</code> object.
     * @return the connection that produced this statement
     * @exception SQLException if a database access error occurs
     * @since 1.2
     */
    @Override
    public Connection getConnection() throws SQLException {
        return connection;
    }

    //--------------------------JDBC 3.0-----------------------------

    /**
     * Moves to this <code>Statement</code> object's next result, deals with
     * any current <code>ResultSet</code> object(s) according  to the instructions
     * specified by the given flag, and returns
     * <code>true</code> if the next result is a <code>ResultSet</code> object.
     *
     * <P>There are no more results when the following is true:
     * <PRE>
     *     // stmt is a Statement object
     *     ((stmt.getMoreResults() == false) &amp;&amp; (stmt.getUpdateCount() == -1))
     * </PRE>
     *
     * @param current one of the following <code>Statement</code>
     *        constants indicating what should happen to current
     *        <code>ResultSet</code> objects obtained using the method
     *        <code>getResultSet</code>:
     *        <code>Statement.CLOSE_CURRENT_RESULT</code>,
     *        <code>Statement.KEEP_CURRENT_RESULT</code>, or
     *        <code>Statement.CLOSE_ALL_RESULTS</code>
     * @return <code>true</code> if the next result is a <code>ResultSet</code>
     *         object; <code>false</code> if it is an update count or there are no
     *         more results
     * @exception SQLException if a database access error occurs or the argument
     *         supplied is not one of the following:
     *        <code>Statement.CLOSE_CURRENT_RESULT</code>,
     *        <code>Statement.KEEP_CURRENT_RESULT</code>, or
     *        <code>Statement.CLOSE_ALL_RESULTS</code>
     * @since 1.4
     * @see #execute
     */
    @Override
    public boolean getMoreResults(int current) throws SQLException {
        return false;
    }

    /**
     * Retrieves any auto-generated keys created as a result of executing this
     * <code>Statement</code> object. If this <code>Statement</code> object did
     * not generate any keys, an empty <code>ResultSet</code>
     * object is returned.
     *
     * @return a <code>ResultSet</code> object containing the auto-generated key(s)
     *         generated by the execution of this <code>Statement</code> object
     * @exception SQLException if a database access error occurs
     * @since 1.4
     */
    @Override
    public ResultSet getGeneratedKeys() throws SQLException {
        return null;
    }

    /**
     * Executes the given SQL statement and signals the driver with the
     * given flag about whether the
     * auto-generated keys produced by this <code>Statement</code> object
     * should be made available for retrieval.
     *
     * @param sql must be an SQL <code>INSERT</code>, <code>UPDATE</code> or
     *        <code>DELETE</code> statement or an SQL statement that
     *        returns nothing
     * @param autoGeneratedKeys a flag indicating whether auto-generated keys
     *        should be made available for retrieval;
     *         one of the following constants:
     *         <code>Statement.RETURN_GENERATED_KEYS</code>
     *         <code>Statement.NO_GENERATED_KEYS</code>
     * @return either the row count for <code>INSERT</code>, <code>UPDATE</code>
     *         or <code>DELETE</code> statements, or <code>0</code> for SQL
     *         statements that return nothing
     * @exception SQLException if a database access error occurs, the given
     *            SQL statement returns a <code>ResultSet</code> object, or
     *            the given constant is not one of those allowed
     * @since 1.4
     */
    @Override
    public int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
        return 1;
    }

    /**
     * Executes the given SQL statement and signals the driver that the
     * auto-generated keys indicated in the given array should be made available
     * for retrieval.  The driver will ignore the array if the SQL statement
     * is not an <code>INSERT</code> statement.
     *
     * @param sql an SQL <code>INSERT</code>, <code>UPDATE</code> or
     *        <code>DELETE</code> statement or an SQL statement that returns nothing,
     *        such as an SQL DDL statement
     * @param columnIndexes an array of column indexes indicating the columns
     *        that should be returned from the inserted row
     * @return either the row count for <code>INSERT</code>, <code>UPDATE</code>,
     *         or <code>DELETE</code> statements, or 0 for SQL statements
     *         that return nothing
     * @exception SQLException if a database access error occurs, the SQL
     *            statement returns a <code>ResultSet</code> object, or the
     *            second argument supplied to this method is not an <code>int</code> array
     *            whose elements are valid column indexes
     * @since 1.4
     */
    @Override
    public int executeUpdate(String sql, int[] columnIndexes) throws SQLException {
        return 1;
    }

    /**
     * Executes the given SQL statement and signals the driver that the
     * auto-generated keys indicated in the given array should be made available
     * for retrieval.  The driver will ignore the array if the SQL statement
     * is not an <code>INSERT</code> statement.
     *
     * @param sql an SQL <code>INSERT</code>, <code>UPDATE</code> or
     *        <code>DELETE</code> statement or an SQL statement that returns nothing
     * @param columnNames an array of the names of the columns that should be
     *        returned from the inserted row
     * @return either the row count for <code>INSERT</code>, <code>UPDATE</code>,
     *         or <code>DELETE</code> statements, or 0 for SQL statements
     *         that return nothing
     * @exception SQLException if a database access error occurs, the SQL
     *            statement returns a <code>ResultSet</code> object, or the
     *            second argument supplied to this method is not a <code>String</code> array
     *            whose elements are valid column names
     *
     * @since 1.4
     */
    @Override
    public int executeUpdate(String sql, String[] columnNames) throws SQLException {
        return 1;
    }

    /**
     * Executes the given SQL statement, which may return multiple results,
     * and signals the driver that any
     * auto-generated keys should be made available
     * for retrieval.  The driver will ignore this signal if the SQL statement
     * is not an <code>INSERT</code> statement.
     * <P>
     * In some (uncommon) situations, a single SQL statement may return
     * multiple result sets and/or update counts.  Normally you can ignore
     * this unless you are (1) executing a stored procedure that you know may
     * return multiple results or (2) you are dynamically executing an
     * unknown SQL string.
     * <P>
     * The <code>execute</code> method executes an SQL statement and indicates the
     * form of the first result.  You must then use the methods
     * <code>getResultSet</code> or <code>getUpdateCount</code>
     * to retrieve the result, and <code>getMoreResults</code> to
     * move to any subsequent result(s).
     *
     * @param sql any SQL statement
     * @param autoGeneratedKeys a constant indicating whether auto-generated
     *        keys should be made available for retrieval using the method
     *        <code>getGeneratedKeys</code>; one of the following constants:
     *        <code>Statement.RETURN_GENERATED_KEYS</code> or
     *          <code>Statement.NO_GENERATED_KEYS</code>
     * @return <code>true</code> if the first result is a <code>ResultSet</code>
     *         object; <code>false</code> if it is an update count or there are
     *         no results
     * @exception SQLException if a database access error occurs or the second
     *         parameter supplied to this method is not
     *         <code>Statement.RETURN_GENERATED_KEYS</code> or
     *         <code>Statement.NO_GENERATED_KEYS</code>.
     * @see #getResultSet
     * @see #getUpdateCount
     * @see #getMoreResults
     * @see #getGeneratedKeys
     *
     * @since 1.4
     */
    @Override
    public boolean execute(String sql, int autoGeneratedKeys) throws SQLException {
        return true;
    }

    /**
     * Executes the given SQL statement, which may return multiple results,
     * and signals the driver that the
     * auto-generated keys indicated in the given array should be made available
     * for retrieval.  This array contains the indexes of the columns in the
     * target table that contain the auto-generated keys that should be made
     * available. The driver will ignore the array if the given SQL statement
     * is not an <code>INSERT</code> statement.
     * <P>
     * Under some (uncommon) situations, a single SQL statement may return
     * multiple result sets and/or update counts.  Normally you can ignore
     * this unless you are (1) executing a stored procedure that you know may
     * return multiple results or (2) you are dynamically executing an
     * unknown SQL string.
     * <P>
     * The <code>execute</code> method executes an SQL statement and indicates the
     * form of the first result.  You must then use the methods
     * <code>getResultSet</code> or <code>getUpdateCount</code>
     * to retrieve the result, and <code>getMoreResults</code> to
     * move to any subsequent result(s).
     *
     * @param sql any SQL statement
     * @param columnIndexes an array of the indexes of the columns in the
     *        inserted row that should be  made available for retrieval by a
     *        call to the method <code>getGeneratedKeys</code>
     * @return <code>true</code> if the first result is a <code>ResultSet</code>
     *         object; <code>false</code> if it is an update count or there
     *         are no results
     * @exception SQLException if a database access error occurs or the
     *            elements in the <code>int</code> array passed to this method
     *            are not valid column indexes
     * @see #getResultSet
     * @see #getUpdateCount
     * @see #getMoreResults
     *
     * @since 1.4
     */
    @Override
    public boolean execute(String sql, int[] columnIndexes) throws SQLException {
        return true;
    }

    /**
     * Executes the given SQL statement, which may return multiple results,
     * and signals the driver that the
     * auto-generated keys indicated in the given array should be made available
     * for retrieval. This array contains the names of the columns in the
     * target table that contain the auto-generated keys that should be made
     * available. The driver will ignore the array if the given SQL statement
     * is not an <code>INSERT</code> statement.
     * <P>
     * In some (uncommon) situations, a single SQL statement may return
     * multiple result sets and/or update counts.  Normally you can ignore
     * this unless you are (1) executing a stored procedure that you know may
     * return multiple results or (2) you are dynamically executing an
     * unknown SQL string.
     * <P>
     * The <code>execute</code> method executes an SQL statement and indicates the
     * form of the first result.  You must then use the methods
     * <code>getResultSet</code> or <code>getUpdateCount</code>
     * to retrieve the result, and <code>getMoreResults</code> to
     * move to any subsequent result(s).
     *
     * @param sql any SQL statement
     * @param columnNames an array of the names of the columns in the inserted
     *        row that should be made available for retrieval by a call to the
     *        method <code>getGeneratedKeys</code>
     * @return <code>true</code> if the next result is a <code>ResultSet</code>
     *         object; <code>false</code> if it is an update count or there
     *         are no more results
     * @exception SQLException if a database access error occurs or the
     *          elements of the <code>String</code> array passed to this
     *          method are not valid column names
     * @see #getResultSet
     * @see #getUpdateCount
     * @see #getMoreResults
     * @see #getGeneratedKeys
     *
     * @since 1.4
     */
    @Override
    public boolean execute(String sql, String[] columnNames) throws SQLException {
        return true;
    }

    /**
     * Retrieves the result set holdability for <code>ResultSet</code> objects
     * generated by this <code>Statement</code> object.
     *
     * @return either <code>ResultSet.HOLD_CURSORS_OVER_COMMIT</code> or
     *         <code>ResultSet.CLOSE_CURSORS_AT_COMMIT</code>
     * @exception SQLException if a database access error occurs
     *
     * @since 1.4
     */
    @Override
    public int getResultSetHoldability() throws SQLException {
        return 0;
    }

    // 236070: Methods introduced in JDK 1.6

    @Override
    public void setAsciiStream(int columnIndex, InputStream stream, long length)  throws SQLException {
    }

    @Override
    public void setAsciiStream(int columnIndex, InputStream stream)  throws SQLException {
    }

    public void setAsciiStream(String columnLabel, InputStream stream, long length)  throws SQLException {
    }

    public void setAsciiStream(String columnLabel, InputStream stream)  throws SQLException {
    }

    @Override
    public void setBlob(int columnIndex, InputStream stream, long length)  throws SQLException {
    }

    @Override
    public void setBlob(int columnIndex, InputStream stream)  throws SQLException {
    }

    public void setBlob(String columnLabel, InputStream stream, long length)  throws SQLException {
    }

    public void setBlob(String columnLabel, InputStream stream)  throws SQLException {
    }

    @Override
    public void setBinaryStream(int columnIndex, InputStream stream, long length)  throws SQLException {
    }

    @Override
    public void setBinaryStream(int columnIndex, InputStream stream)  throws SQLException {
    }

    public void setBinaryStream(String columnLabel, InputStream stream, long length)  throws SQLException {
    }

    public void setBinaryStream(String columnLabel, InputStream stream)  throws SQLException {
    }

    @Override
    public void setCharacterStream(int columnIndex, Reader reader, long length)  throws SQLException {
    }

    @Override
    public void setCharacterStream(int columnIndex, Reader reader)  throws SQLException {
    }

    public void setCharacterStream(String columnLabel, Reader reader, long length)  throws SQLException {
    }

    public void setCharacterStream(String columnLabel, Reader reader)  throws SQLException {
    }

    @Override
    public void setClob(int columnIndex, Reader reader, long length)  throws SQLException {
    }

    @Override
    public void setClob(int columnIndex, Reader reader)  throws SQLException {
    }

    public void setClob(String columnLabel, Reader reader, long length)  throws SQLException {
    }

    public void setClob(String columnLabel, Reader reader)  throws SQLException {
    }

    @Override
    public void setNCharacterStream(int columnIndex, Reader reader, long length)  throws SQLException {
    }

    @Override
    public void setNCharacterStream(int columnIndex, Reader reader)  throws SQLException {
    }

    public void setNCharacterStream(String columnLabel, Reader reader, long length)  throws SQLException {
    }

    public void setNCharacterStream(String columnLabel, Reader reader)  throws SQLException {
    }

    @Override
    public void setNClob(int columnIndex, Reader reader, long length)  throws SQLException {
    }

    @Override
    public void setNClob(int columnIndex, Reader reader)  throws SQLException {
    }

    public void setNClob(String columnLabel, Reader reader, long length)  throws SQLException {
    }

    public void setNClob(String columnLabel, Reader reader)  throws SQLException {
    }

    @Override
    public void setNClob(int columnIndex, NClob nclob)  throws SQLException {
    }

    public void setNClob(String columnLabel, NClob nclob)  throws SQLException {
    }

    @Override
    public void setNString(int columnIndex, String nString)  throws SQLException {
    }

    public void setNString(String columnLabel, String nString)  throws SQLException {
    }

    public void setSQLXML(String columnLabel, SQLXML sqlxml)  throws SQLException {
    }

    @Override
    public void setSQLXML(int columnIndex, SQLXML sqlxml)  throws SQLException {
    }

    @Override
    public void setRowId(int columnIndex, RowId rowid)  throws SQLException {
    }

    public void setRowId(String columnLabel, RowId rowid)  throws SQLException {
    }

    @Override
    public boolean isClosed()  throws SQLException {
        return false;
    }

    @Override
    public boolean isPoolable()  throws SQLException {
        return false;
    }

    @Override
    public void setPoolable(boolean poolable)  throws SQLException {
    }

    // From java.sql.Wrapper
    @Override
    public boolean isWrapperFor(Class<?> iFace) throws SQLException{
        return false;
    }

    @Override
    public <T>T unwrap(Class<T> iFace)  throws SQLException {
        return iFace.cast(this);
    }

    @Override
    public boolean isCloseOnCompletion(){return false;}

    @Override
    public void closeOnCompletion(){}
}