| /* | |
| * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved. | |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| * | |
| * This code is free software; you can redistribute it and/or modify it | |
| * under the terms of the GNU General Public License version 2 only, as | |
| * published by the Free Software Foundation. Oracle designates this | |
| * particular file as subject to the "Classpath" exception as provided | |
| * by Oracle in the LICENSE file that accompanied this code. | |
| * | |
| * This code is distributed in the hope that it will be useful, but WITHOUT | |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| * version 2 for more details (a copy is included in the LICENSE file that | |
| * accompanied this code). | |
| * | |
| * You should have received a copy of the GNU General Public License version | |
| * 2 along with this work; if not, write to the Free Software Foundation, | |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| * | |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| * or visit www.oracle.com if you need additional information or have any | |
| * questions. | |
| */ | |
| package javax.sql.rowset.serial; | |
| import java.sql.*; | |
| import java.io.*; | |
| import java.util.Arrays; | |
| /** | |
| * A serialized mapping in the Java programming language of an SQL | |
| * <code>CLOB</code> value. | |
| * <P> | |
| * The <code>SerialClob</code> class provides a constructor for creating | |
| * an instance from a <code>Clob</code> object. Note that the <code>Clob</code> | |
| * object should have brought the SQL <code>CLOB</code> value's data over | |
| * to the client before a <code>SerialClob</code> object | |
| * is constructed from it. The data of an SQL <code>CLOB</code> value can | |
| * be materialized on the client as a stream of Unicode characters. | |
| * <P> | |
| * <code>SerialClob</code> methods make it possible to get a substring | |
| * from a <code>SerialClob</code> object or to locate the start of | |
| * a pattern of characters. | |
| * | |
| * <h2> Thread safety </h2> | |
| * | |
| * <p> A SerialClob is not safe for use by multiple concurrent threads. If a | |
| * SerialClob is to be used by more than one thread then access to the SerialClob | |
| * should be controlled by appropriate synchronization. | |
| * | |
| * @author Jonathan Bruce | |
| * @since 1.5 | |
| */ | |
| public class SerialClob implements Clob, Serializable, Cloneable { | |
| /** | |
| * A serialized array of characters containing the data of the SQL | |
| * <code>CLOB</code> value that this <code>SerialClob</code> object | |
| * represents. | |
| * | |
| * @serial | |
| */ | |
| private char buf[]; | |
| /** | |
| * @serial Internal Clob representation if SerialClob is initialized with a | |
| * Clob. Null if SerialClob is initialized with a char[]. | |
| */ | |
| @SuppressWarnings("serial") // Not statically typed as Serializable; checked in writeObject | |
| private Clob clob; | |
| /** | |
| * The length in characters of this <code>SerialClob</code> object's | |
| * internal array of characters. | |
| * | |
| * @serial | |
| */ | |
| private long len; | |
| /** | |
| * The original length in characters of this <code>SerialClob</code> | |
| * object's internal array of characters. | |
| * | |
| * @serial | |
| */ | |
| private long origLen; | |
| /** | |
| * Constructs a <code>SerialClob</code> object that is a serialized version of | |
| * the given <code>char</code> array. | |
| * <p> | |
| * The new <code>SerialClob</code> object is initialized with the data from the | |
| * <code>char</code> array, thus allowing disconnected <code>RowSet</code> | |
| * objects to establish a serialized <code>Clob</code> object without touching | |
| * the data source. | |
| * | |
| * @param ch the char array representing the <code>Clob</code> object to be | |
| * serialized | |
| * @throws SerialException if an error occurs during serialization | |
| * @throws SQLException if a SQL error occurs | |
| */ | |
| public SerialClob(char ch[]) throws SerialException, SQLException { | |
| // %%% JMB. Agreed. Add code here to throw a SQLException if no | |
| // support is available for locatorsUpdateCopy=false | |
| // Serializing locators is not supported. | |
| len = ch.length; | |
| buf = new char[(int)len]; | |
| for (int i = 0; i < len ; i++){ | |
| buf[i] = ch[i]; | |
| } | |
| origLen = len; | |
| clob = null; | |
| } | |
| /** | |
| * Constructs a <code>SerialClob</code> object that is a serialized | |
| * version of the given <code>Clob</code> object. | |
| * <P> | |
| * The new <code>SerialClob</code> object is initialized with the | |
| * data from the <code>Clob</code> object; therefore, the | |
| * <code>Clob</code> object should have previously brought the | |
| * SQL <code>CLOB</code> value's data over to the client from | |
| * the database. Otherwise, the new <code>SerialClob</code> object | |
| * object will contain no data. | |
| * <p> | |
| * Note: The <code>Clob</code> object supplied to this constructor must | |
| * return non-null for both the <code>Clob.getCharacterStream()</code> | |
| * and <code>Clob.getAsciiStream</code> methods. This <code>SerialClob</code> | |
| * constructor cannot serialize a <code>Clob</code> object in this instance | |
| * and will throw an <code>SQLException</code> object. | |
| * | |
| * @param clob the <code>Clob</code> object from which this | |
| * <code>SerialClob</code> object is to be constructed; cannot be null | |
| * @throws SerialException if an error occurs during serialization | |
| * @throws SQLException if a SQL error occurs in capturing the CLOB; | |
| * if the <code>Clob</code> object is a null; or if either of the | |
| * <code>Clob.getCharacterStream()</code> and <code>Clob.getAsciiStream()</code> | |
| * methods on the <code>Clob</code> returns a null | |
| * @see java.sql.Clob | |
| */ | |
| public SerialClob(Clob clob) throws SerialException, SQLException { | |
| if (clob == null) { | |
| throw new SQLException("Cannot instantiate a SerialClob " + | |
| "object with a null Clob object"); | |
| } | |
| len = clob.length(); | |
| this.clob = clob; | |
| buf = new char[(int)len]; | |
| int read = 0; | |
| int offset = 0; | |
| try (Reader charStream = clob.getCharacterStream()) { | |
| if (charStream == null) { | |
| throw new SQLException("Invalid Clob object. The call to getCharacterStream " + | |
| "returned null which cannot be serialized."); | |
| } | |
| // Note: get an ASCII stream in order to null-check it, | |
| // even though we don't do anything with it. | |
| try (InputStream asciiStream = clob.getAsciiStream()) { | |
| if (asciiStream == null) { | |
| throw new SQLException("Invalid Clob object. The call to getAsciiStream " + | |
| "returned null which cannot be serialized."); | |
| } | |
| } | |
| try (Reader reader = new BufferedReader(charStream)) { | |
| do { | |
| read = reader.read(buf, offset, (int)(len - offset)); | |
| offset += read; | |
| } while (read > 0); | |
| } | |
| } catch (java.io.IOException ex) { | |
| throw new SerialException("SerialClob: " + ex.getMessage()); | |
| } | |
| origLen = len; | |
| } | |
| /** | |
| * Retrieves the number of characters in this <code>SerialClob</code> | |
| * object's array of characters. | |
| * | |
| * @return a <code>long</code> indicating the length in characters of this | |
| * <code>SerialClob</code> object's array of character | |
| * @throws SerialException if an error occurs; | |
| * if {@code free} had previously been called on this object | |
| */ | |
| public long length() throws SerialException { | |
| isValid(); | |
| return len; | |
| } | |
| /** | |
| * Returns this <code>SerialClob</code> object's data as a stream | |
| * of Unicode characters. Unlike the related method, <code>getAsciiStream</code>, | |
| * a stream is produced regardless of whether the <code>SerialClob</code> object | |
| * was created with a <code>Clob</code> object or a <code>char</code> array. | |
| * | |
| * @return a <code>java.io.Reader</code> object containing this | |
| * <code>SerialClob</code> object's data | |
| * @throws SerialException if an error occurs; | |
| * if {@code free} had previously been called on this object | |
| */ | |
| public java.io.Reader getCharacterStream() throws SerialException { | |
| isValid(); | |
| return (java.io.Reader) new CharArrayReader(buf); | |
| } | |
| /** | |
| * Retrieves the <code>CLOB</code> value designated by this <code>SerialClob</code> | |
| * object as an ascii stream. This method forwards the <code>getAsciiStream</code> | |
| * call to the underlying <code>Clob</code> object in the event that this | |
| * <code>SerialClob</code> object is instantiated with a <code>Clob</code> | |
| * object. If this <code>SerialClob</code> object is instantiated with | |
| * a <code>char</code> array, a <code>SerialException</code> object is thrown. | |
| * | |
| * @return a <code>java.io.InputStream</code> object containing | |
| * this <code>SerialClob</code> object's data | |
| * @throws SerialException if this {@code SerialClob} object was not | |
| * instantiated with a <code>Clob</code> object; | |
| * if {@code free} had previously been called on this object | |
| * @throws SQLException if there is an error accessing the | |
| * <code>CLOB</code> value represented by the <code>Clob</code> object | |
| * that was used to create this <code>SerialClob</code> object | |
| */ | |
| public java.io.InputStream getAsciiStream() throws SerialException, SQLException { | |
| isValid(); | |
| if (this.clob != null) { | |
| return this.clob.getAsciiStream(); | |
| } else { | |
| throw new SerialException("Unsupported operation. SerialClob cannot " + | |
| "return the CLOB value as an ascii stream, unless instantiated " + | |
| "with a fully implemented Clob object."); | |
| } | |
| } | |
| /** | |
| * Returns a copy of the substring contained in this | |
| * <code>SerialClob</code> object, starting at the given position | |
| * and continuing for the specified number or characters. | |
| * | |
| * @param pos the position of the first character in the substring | |
| * to be copied; the first character of the | |
| * <code>SerialClob</code> object is at position | |
| * <code>1</code>; must not be less than <code>1</code>, | |
| * and the sum of the starting position and the length | |
| * of the substring must be less than the length of this | |
| * <code>SerialClob</code> object | |
| * @param length the number of characters in the substring to be | |
| * returned; must not be greater than the length of | |
| * this <code>SerialClob</code> object, and the | |
| * sum of the starting position and the length | |
| * of the substring must be less than the length of this | |
| * <code>SerialClob</code> object | |
| * @return a <code>String</code> object containing a substring of | |
| * this <code>SerialClob</code> object beginning at the | |
| * given position and containing the specified number of | |
| * consecutive characters | |
| * @throws SerialException if either of the arguments is out of bounds; | |
| * if {@code free} had previously been called on this object | |
| */ | |
| public String getSubString(long pos, int length) throws SerialException { | |
| isValid(); | |
| if (pos < 1 || pos > this.length()) { | |
| throw new SerialException("Invalid position in SerialClob object set"); | |
| } | |
| if ((pos-1) + length > this.length()) { | |
| throw new SerialException("Invalid position and substring length"); | |
| } | |
| try { | |
| return new String(buf, (int)pos - 1, length); | |
| } catch (StringIndexOutOfBoundsException e) { | |
| throw new SerialException("StringIndexOutOfBoundsException: " + | |
| e.getMessage()); | |
| } | |
| } | |
| /** | |
| * Returns the position in this <code>SerialClob</code> object | |
| * where the given <code>String</code> object begins, starting | |
| * the search at the specified position. This method returns | |
| * <code>-1</code> if the pattern is not found. | |
| * | |
| * @param searchStr the <code>String</code> object for which to | |
| * search | |
| * @param start the position in this <code>SerialClob</code> object | |
| * at which to start the search; the first position is | |
| * <code>1</code>; must not be less than <code>1</code> nor | |
| * greater than the length of this <code>SerialClob</code> object | |
| * @return the position at which the given <code>String</code> object | |
| * begins, starting the search at the specified position; | |
| * <code>-1</code> if the given <code>String</code> object is | |
| * not found or the starting position is out of bounds; position | |
| * numbering for the return value starts at <code>1</code> | |
| * @throws SerialException if the {@code free} method had been | |
| * previously called on this object | |
| * @throws SQLException if there is an error accessing the Clob value | |
| * from the database. | |
| */ | |
| public long position(String searchStr, long start) | |
| throws SerialException, SQLException { | |
| isValid(); | |
| if (start < 1 || start > len) { | |
| return -1; | |
| } | |
| char pattern[] = searchStr.toCharArray(); | |
| int pos = (int)start-1; | |
| int i = 0; | |
| long patlen = pattern.length; | |
| while (pos < len) { | |
| if (pattern[i] == buf[pos]) { | |
| if (i + 1 == patlen) { | |
| return (pos + 1) - (patlen - 1); | |
| } | |
| i++; pos++; // increment pos, and i | |
| } else if (pattern[i] != buf[pos]) { | |
| pos++; // increment pos only | |
| } | |
| } | |
| return -1; // not found | |
| } | |
| /** | |
| * Returns the position in this <code>SerialClob</code> object | |
| * where the given <code>Clob</code> signature begins, starting | |
| * the search at the specified position. This method returns | |
| * <code>-1</code> if the pattern is not found. | |
| * | |
| * @param searchStr the <code>Clob</code> object for which to search | |
| * @param start the position in this <code>SerialClob</code> object | |
| * at which to begin the search; the first position is | |
| * <code>1</code>; must not be less than <code>1</code> nor | |
| * greater than the length of this <code>SerialClob</code> object | |
| * @return the position at which the given <code>Clob</code> | |
| * object begins in this <code>SerialClob</code> object, | |
| * at or after the specified starting position | |
| * @throws SerialException if an error occurs locating the Clob signature; | |
| * if the {@code free} method had been previously called on this object | |
| * @throws SQLException if there is an error accessing the Clob value | |
| * from the database | |
| */ | |
| public long position(Clob searchStr, long start) | |
| throws SerialException, SQLException { | |
| isValid(); | |
| return position(searchStr.getSubString(1,(int)searchStr.length()), start); | |
| } | |
| /** | |
| * Writes the given Java {@code String} to the {@code CLOB} | |
| * value that this {@code SerialClob} object represents, at the position | |
| * {@code pos}. | |
| * | |
| * @param pos the position at which to start writing to the {@code CLOB} | |
| * value that this {@code SerialClob} object represents; the first | |
| * position is {@code 1}; must not be less than {@code 1} nor | |
| * greater than the length+1 of this {@code SerialClob} object | |
| * @param str the string to be written to the {@code CLOB} | |
| * value that this {@code SerialClob} object represents | |
| * @return the number of characters written | |
| * @throws SerialException if there is an error accessing the | |
| * {@code CLOB} value; if an invalid position is set; | |
| * if the {@code free} method had been previously called on this object | |
| */ | |
| public int setString(long pos, String str) throws SerialException { | |
| return (setString(pos, str, 0, str.length())); | |
| } | |
| /** | |
| * Writes {@code len} characters of {@code str}, starting | |
| * at character {@code offset}, to the {@code CLOB} value | |
| * that this {@code Clob} represents. | |
| * | |
| * @param pos the position at which to start writing to the {@code CLOB} | |
| * value that this {@code SerialClob} object represents; the first | |
| * position is {@code 1}; must not be less than {@code 1} nor | |
| * greater than the length+1 of this {@code SerialClob} object | |
| * @param str the string to be written to the {@code CLOB} | |
| * value that this {@code Clob} object represents | |
| * @param offset the offset into {@code str} to start reading | |
| * the characters to be written | |
| * @param length the number of characters to be written | |
| * @return the number of characters written | |
| * @throws SerialException if there is an error accessing the | |
| * {@code CLOB} value; if an invalid position is set; if an | |
| * invalid offset value is set; or the combined values of the | |
| * {@code length} and {@code offset} is greater than the length of | |
| * {@code str}; | |
| * if the {@code free} method had been previously called on this object | |
| */ | |
| public int setString(long pos, String str, int offset, int length) | |
| throws SerialException { | |
| isValid(); | |
| if (offset < 0 || offset > str.length()) { | |
| throw new SerialException("Invalid offset in String object set"); | |
| } | |
| if (length < 0) { | |
| throw new SerialException("Invalid arguments: length cannot be " | |
| + "negative"); | |
| } | |
| if (pos < 1 || pos > len + 1) { | |
| throw new SerialException("Invalid position in Clob object set"); | |
| } | |
| if (length > str.length() - offset) { | |
| // need check to ensure length + offset !> str.length | |
| throw new SerialException("Invalid OffSet. Cannot have combined offset " + | |
| " and length that is greater than the length of str"); | |
| } | |
| if (pos - 1 + length > Integer.MAX_VALUE) { | |
| throw new SerialException("Invalid length. Cannot have combined pos " + | |
| "and length that is greater than Integer.MAX_VALUE"); | |
| } | |
| pos--; //values in the array are at position one less | |
| if (pos + length > len) { | |
| len = pos + length; | |
| char[] newbuf = new char[(int)len]; | |
| System.arraycopy(buf, 0, newbuf, 0, (int)pos); | |
| buf = newbuf; | |
| } | |
| String temp = str.substring(offset, offset + length); | |
| char cPattern[] = temp.toCharArray(); | |
| System.arraycopy(cPattern, 0, buf, (int)pos, length); | |
| return length; | |
| } | |
| /** | |
| * Retrieves a stream to be used to write Ascii characters to the | |
| * <code>CLOB</code> value that this <code>SerialClob</code> object represents, | |
| * starting at position <code>pos</code>. This method forwards the | |
| * <code>setAsciiStream()</code> call to the underlying <code>Clob</code> object in | |
| * the event that this <code>SerialClob</code> object is instantiated with a | |
| * <code>Clob</code> object. If this <code>SerialClob</code> object is instantiated | |
| * with a <code>char</code> array, a <code>SerialException</code> object is thrown. | |
| * | |
| * @param pos the position at which to start writing to the | |
| * <code>CLOB</code> object | |
| * @return the stream to which ASCII encoded characters can be written | |
| * @throws SerialException if SerialClob is not instantiated with a | |
| * Clob object; | |
| * if the {@code free} method had been previously called on this object | |
| * @throws SQLException if there is an error accessing the | |
| * <code>CLOB</code> value | |
| * @see #getAsciiStream | |
| */ | |
| public java.io.OutputStream setAsciiStream(long pos) | |
| throws SerialException, SQLException { | |
| isValid(); | |
| if (this.clob != null) { | |
| return this.clob.setAsciiStream(pos); | |
| } else { | |
| throw new SerialException("Unsupported operation. SerialClob cannot " + | |
| "return a writable ascii stream\n unless instantiated with a Clob object " + | |
| "that has a setAsciiStream() implementation"); | |
| } | |
| } | |
| /** | |
| * Retrieves a stream to be used to write a stream of Unicode characters | |
| * to the <code>CLOB</code> value that this <code>SerialClob</code> object | |
| * represents, at position <code>pos</code>. This method forwards the | |
| * <code>setCharacterStream()</code> call to the underlying <code>Clob</code> | |
| * object in the event that this <code>SerialClob</code> object is instantiated with a | |
| * <code>Clob</code> object. If this <code>SerialClob</code> object is instantiated with | |
| * a <code>char</code> array, a <code>SerialException</code> is thrown. | |
| * | |
| * @param pos the position at which to start writing to the | |
| * <code>CLOB</code> value | |
| * | |
| * @return a stream to which Unicode encoded characters can be written | |
| * @throws SerialException if the SerialClob is not instantiated with | |
| * a Clob object; | |
| * if the {@code free} method had been previously called on this object | |
| * @throws SQLException if there is an error accessing the | |
| * <code>CLOB</code> value | |
| * @see #getCharacterStream | |
| */ | |
| public java.io.Writer setCharacterStream(long pos) | |
| throws SerialException, SQLException { | |
| isValid(); | |
| if (this.clob != null) { | |
| return this.clob.setCharacterStream(pos); | |
| } else { | |
| throw new SerialException("Unsupported operation. SerialClob cannot " + | |
| "return a writable character stream\n unless instantiated with a Clob object " + | |
| "that has a setCharacterStream implementation"); | |
| } | |
| } | |
| /** | |
| * Truncates the <code>CLOB</code> value that this <code>SerialClob</code> | |
| * object represents so that it has a length of <code>len</code> | |
| * characters. | |
| * <p> | |
| * Truncating a <code>SerialClob</code> object to length 0 has the effect of | |
| * clearing its contents. | |
| * | |
| * @param length the length, in bytes, to which the <code>CLOB</code> | |
| * value should be truncated | |
| * @throws SerialException if there is an error accessing the | |
| * <code>CLOB</code> value; | |
| * if the {@code free} method had been previously called on this object | |
| */ | |
| public void truncate(long length) throws SerialException { | |
| isValid(); | |
| if (length > len) { | |
| throw new SerialException | |
| ("Length more than what can be truncated"); | |
| } else { | |
| len = length; | |
| // re-size the buffer | |
| if (len == 0) { | |
| buf = new char[] {}; | |
| } else { | |
| buf = (this.getSubString(1, (int)len)).toCharArray(); | |
| } | |
| } | |
| } | |
| /** | |
| * Returns a {@code Reader} object that contains a partial | |
| * {@code SerialClob} value, starting | |
| * with the character specified by pos, which is length characters in length. | |
| * | |
| * @param pos the offset to the first character of the partial value to | |
| * be retrieved. The first character in the {@code SerialClob} is at position 1. | |
| * @param length the length in characters of the partial value to be retrieved. | |
| * @return {@code Reader} through which the partial {@code SerialClob} | |
| * value can be read. | |
| * @throws SQLException if pos is less than 1 or if pos is greater than the | |
| * number of characters in the {@code SerialClob} or if pos + length | |
| * is greater than the number of characters in the {@code SerialClob}; | |
| * @throws SerialException if the {@code free} method had been previously | |
| * called on this object | |
| * @since 1.6 | |
| */ | |
| public Reader getCharacterStream(long pos, long length) throws SQLException { | |
| isValid(); | |
| if (pos < 1 || pos > len) { | |
| throw new SerialException("Invalid position in Clob object set"); | |
| } | |
| if ((pos-1) + length > len) { | |
| throw new SerialException("Invalid position and substring length"); | |
| } | |
| if (length <= 0) { | |
| throw new SerialException("Invalid length specified"); | |
| } | |
| return new CharArrayReader(buf, (int)pos, (int)length); | |
| } | |
| /** | |
| * This method frees the {@code SerialClob} object and releases the | |
| * resources that it holds. | |
| * The object is invalid once the {@code free} method is called. | |
| * <p> | |
| * If {@code free} is called multiple times, the subsequent | |
| * calls to {@code free} are treated as a no-op. | |
| * </P> | |
| * @throws SQLException if an error occurs releasing | |
| * the Clob's resources | |
| * @since 1.6 | |
| */ | |
| public void free() throws SQLException { | |
| if (buf != null) { | |
| buf = null; | |
| if (clob != null) { | |
| clob.free(); | |
| } | |
| clob = null; | |
| } | |
| } | |
| /** | |
| * Compares this SerialClob to the specified object. The result is {@code | |
| * true} if and only if the argument is not {@code null} and is a {@code | |
| * SerialClob} object that represents the same sequence of characters as this | |
| * object. | |
| * | |
| * @param obj The object to compare this {@code SerialClob} against | |
| * | |
| * @return {@code true} if the given object represents a {@code SerialClob} | |
| * equivalent to this SerialClob, {@code false} otherwise | |
| * | |
| */ | |
| public boolean equals(Object obj) { | |
| if (this == obj) { | |
| return true; | |
| } | |
| if (obj instanceof SerialClob) { | |
| SerialClob sc = (SerialClob)obj; | |
| if (this.len == sc.len) { | |
| return Arrays.equals(buf, sc.buf); | |
| } | |
| } | |
| return false; | |
| } | |
| /** | |
| * Returns a hash code for this {@code SerialClob}. | |
| * @return a hash code value for this object. | |
| */ | |
| public int hashCode() { | |
| return ((31 + Arrays.hashCode(buf)) * 31 + (int)len) * 31 + (int)origLen; | |
| } | |
| /** | |
| * Returns a clone of this {@code SerialClob}. The copy will contain a | |
| * reference to a clone of the internal character array, not a reference | |
| * to the original internal character array of this {@code SerialClob} object. | |
| * The underlying {@code Clob} object will be set to null. | |
| * | |
| * @return a clone of this SerialClob | |
| */ | |
| public Object clone() { | |
| try { | |
| SerialClob sc = (SerialClob) super.clone(); | |
| sc.buf = (buf != null) ? Arrays.copyOf(buf, (int)len) : null; | |
| sc.clob = null; | |
| return sc; | |
| } catch (CloneNotSupportedException ex) { | |
| // this shouldn't happen, since we are Cloneable | |
| throw new InternalError(); | |
| } | |
| } | |
| /** | |
| * readObject is called to restore the state of the SerialClob from | |
| * a stream. | |
| * @param s the {@code ObjectInputStream} to read from. | |
| * | |
| * @throws ClassNotFoundException if the class of a serialized object | |
| * could not be found. | |
| * @throws IOException if an I/O error occurs. | |
| */ | |
| private void readObject(ObjectInputStream s) | |
| throws IOException, ClassNotFoundException { | |
| ObjectInputStream.GetField fields = s.readFields(); | |
| char[] tmp = (char[])fields.get("buf", null); | |
| if (tmp == null) | |
| throw new InvalidObjectException("buf is null and should not be!"); | |
| buf = tmp.clone(); | |
| len = fields.get("len", 0L); | |
| if (buf.length != len) | |
| throw new InvalidObjectException("buf is not the expected size"); | |
| origLen = fields.get("origLen", 0L); | |
| clob = (Clob) fields.get("clob", null); | |
| } | |
| /** | |
| * writeObject is called to save the state of the SerialClob | |
| * to a stream. | |
| * @param s the {@code ObjectOutputStream} to write to. | |
| * @throws IOException if an I/O error occurs. | |
| */ | |
| private void writeObject(ObjectOutputStream s) | |
| throws IOException { | |
| ObjectOutputStream.PutField fields = s.putFields(); | |
| fields.put("buf", buf); | |
| fields.put("len", len); | |
| fields.put("origLen", origLen); | |
| // Note: this check to see if it is an instance of Serializable | |
| // is for backwards compatibility | |
| fields.put("clob", clob instanceof Serializable ? clob : null); | |
| s.writeFields(); | |
| } | |
| /** | |
| * Check to see if this object had previously had its {@code free} method | |
| * called | |
| * | |
| * @throws SerialException | |
| */ | |
| private void isValid() throws SerialException { | |
| if (buf == null) { | |
| throw new SerialException("Error: You cannot call a method on a " | |
| + "SerialClob instance once free() has been called."); | |
| } | |
| } | |
| /** | |
| * The identifier that assists in the serialization of this {@code SerialClob} | |
| * object. | |
| */ | |
| static final long serialVersionUID = -1662519690087375313L; | |
| } |