/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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 Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.designer.core.util.undo;
import org.pentaho.reporting.designer.core.editor.ReportDocumentContext;
import org.pentaho.reporting.designer.core.model.ModelUtility;
import org.pentaho.reporting.engine.classic.core.ReportElement;
import org.pentaho.reporting.engine.classic.core.function.Expression;
import org.pentaho.reporting.engine.classic.core.util.InstanceID;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;
/**
* Todo: Document Me
*
* @author Thomas Morgner
*/
public class AttributeExpressionEditUndoEntry implements UndoEntry
{
private InstanceID target;
private String attributeNamespace;
private String attributeName;
private Expression newValue;
private Expression oldValue;
public AttributeExpressionEditUndoEntry(final InstanceID target,
final String attributeNamespace,
final String attributeName,
final Expression oldValue,
final Expression newValue)
{
this.target = target;
this.attributeNamespace = attributeNamespace;
this.attributeName = attributeName;
this.newValue = newValue;
this.oldValue = oldValue;
}
public void undo(final ReportDocumentContext renderContext)
{
final ReportElement elementById = ModelUtility.findElementById(renderContext.getReportDefinition(), target);
elementById.setAttributeExpression(attributeNamespace, attributeName, oldValue);
}
public void redo(final ReportDocumentContext renderContext)
{
final ReportElement elementById = ModelUtility.findElementById(renderContext.getReportDefinition(), target);
elementById.setAttributeExpression(attributeNamespace, attributeName, newValue);
}
public UndoEntry merge(final UndoEntry newEntry)
{
if (newEntry instanceof AttributeExpressionEditUndoEntry == false)
{
return null;
}
final AttributeExpressionEditUndoEntry entry = (AttributeExpressionEditUndoEntry) newEntry;
if (entry.target == target &&
ObjectUtilities.equal(entry.attributeNamespace, attributeNamespace) &&
ObjectUtilities.equal(entry.attributeName, attributeName))
{
return newEntry;
}
return null;
}
}