/******************************************************************************* | |
* Copyright (c) 1998, 2013 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 v1.0 and Eclipse Distribution License v. 1.0 | |
* which accompanies this distribution. | |
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html | |
* and the Eclipse Distribution License is available at | |
* http://www.eclipse.org/org/documents/edl-v10.php. | |
* | |
* Contributors: | |
* Oracle - initial API and implementation from Oracle TopLink | |
******************************************************************************/ | |
package org.eclipse.persistence.internal.expressions; | |
import java.io.*; | |
import java.util.*; | |
import org.eclipse.persistence.exceptions.*; | |
import org.eclipse.persistence.expressions.Expression; | |
import org.eclipse.persistence.internal.helper.*; | |
import org.eclipse.persistence.queries.*; | |
import org.eclipse.persistence.internal.sessions.AbstractSession; | |
/** | |
* <p><b>Purpose</b>: Print UPDATE statement. | |
* <p><b>Responsibilities</b>:<ul> | |
* <li> Print UPDATE statement. | |
* </ul> | |
* @author Dorin Sandu | |
* @since TOPLink/Java 1.0 | |
*/ | |
public class SQLUpdateStatement extends SQLModifyStatement { | |
/** | |
* Append the string containing the SQL insert string for the given table. | |
*/ | |
protected SQLCall buildCallWithoutReturning(AbstractSession session) { | |
SQLCall call = new SQLCall(); | |
call.returnNothing(); | |
Writer writer = new CharArrayWriter(100); | |
try { | |
writer.write("UPDATE "); | |
if (getHintString() != null) { | |
writer.write(getHintString()); | |
writer.write(" "); | |
} | |
writer.write(getTable().getQualifiedNameDelimited(session.getPlatform())); | |
writer.write(" SET "); | |
ExpressionSQLPrinter printer = null; | |
Vector fieldsForTable = new Vector(); | |
Enumeration valuesEnum = getModifyRow().getValues().elements(); | |
Vector values = new Vector(); | |
for (Enumeration fieldsEnum = getModifyRow().keys(); fieldsEnum.hasMoreElements();) { | |
DatabaseField field = (DatabaseField)fieldsEnum.nextElement(); | |
Object value = valuesEnum.nextElement(); | |
if (field.getTable().equals(getTable()) || (!field.hasTableName())) { | |
fieldsForTable.addElement(field); | |
values.addElement(value); | |
} | |
} | |
if (fieldsForTable.isEmpty()) { | |
return null; | |
} | |
for (int i = 0; i < fieldsForTable.size(); i++) { | |
DatabaseField field = (DatabaseField)fieldsForTable.elementAt(i); | |
writer.write(field.getNameDelimited(session.getPlatform())); | |
writer.write(" = "); | |
if(values.elementAt(i) instanceof Expression) { | |
// the value in the modify row is an expression - assign it. | |
Expression exp = (Expression)values.elementAt(i); | |
if(printer == null) { | |
printer = new ExpressionSQLPrinter(session, getTranslationRow(), call, false, getBuilder()); | |
printer.setWriter(writer); | |
} | |
printer.printExpression(exp); | |
} else { | |
// the value in the modify row is ignored, the parameter corresponding to the key field will be assigned. | |
call.appendModify(writer, field); | |
} | |
if ((i + 1) < fieldsForTable.size()) { | |
writer.write(", "); | |
} | |
} | |
if (!(getWhereClause() == null)) { | |
writer.write(" WHERE "); | |
if(printer == null) { | |
printer = new ExpressionSQLPrinter(session, getTranslationRow(), call, false, getBuilder()); | |
printer.setWriter(writer); | |
} | |
printer.printExpression(getWhereClause()); | |
} | |
call.setSQLString(writer.toString()); | |
return call; | |
} catch (IOException exception) { | |
throw ValidationException.fileError(exception); | |
} | |
} | |
} |