/*
* 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) 2001 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.modules.parser.ext.readhandlers;
import java.util.ArrayList;
import org.pentaho.reporting.engine.classic.core.AttributeNames;
import org.pentaho.reporting.engine.classic.core.Element;
import org.pentaho.reporting.engine.classic.core.filter.DataSource;
import org.pentaho.reporting.engine.classic.core.function.Expression;
import org.pentaho.reporting.engine.classic.core.modules.parser.base.PropertyAttributes;
import org.pentaho.reporting.engine.classic.core.modules.parser.base.common.AbstractPropertyXmlReadHandler;
import org.pentaho.reporting.engine.classic.core.modules.parser.base.common.StyleExpressionHandler;
import org.pentaho.reporting.engine.classic.core.style.StyleKey;
import org.pentaho.reporting.libraries.xmlns.parser.XmlReadHandler;
import org.xml.sax.SAXException;
public class ElementReadHandler extends AbstractPropertyXmlReadHandler
{
private ArrayList styleExpressionHandlers;
private XmlReadHandler dataSourceHandler;
private Element element;
public ElementReadHandler(final Element element)
{
if (element == null)
{
throw new NullPointerException("Element given must not be null.");
}
this.element = element;
this.styleExpressionHandlers = new ArrayList();
}
protected Element getElement()
{
return element;
}
/**
* Starts parsing.
*
* @param attrs the attributes.
* @throws org.xml.sax.SAXException if there is a parsing error.
*/
protected void startParsing(final PropertyAttributes attrs)
throws SAXException
{
final String name = attrs.getValue(getUri(), "name");
if (name != null)
{
element.setName(name);
}
}
/**
* Returns the handler for a child element.
*
* @param tagName the tag name.
* @param atts the attributes.
* @return the handler or null, if the tagname is invalid.
* @throws org.xml.sax.SAXException if there is a parsing error.
*/
protected XmlReadHandler getHandlerForChild(final String uri,
final String tagName,
final PropertyAttributes atts)
throws SAXException
{
if (isSameNamespace(uri) == false)
{
return null;
}
if ("style".equals(tagName))
{
return new StyleReadHandler(element.getStyle());
}
if ("style-expression".equals(tagName))
{
final StyleExpressionHandler styleExpressionHandler = new StyleExpressionHandler();
styleExpressionHandlers.add(styleExpressionHandler);
return styleExpressionHandler;
}
else if ("datasource".equals(tagName))
{
dataSourceHandler = new DataSourceReadHandler();
return dataSourceHandler;
}
else if ("template".equals(tagName))
{
dataSourceHandler = new TemplateReadHandler(false);
return dataSourceHandler;
}
return null;
}
/**
* Done parsing.
*
* @throws org.xml.sax.SAXException if there is a parsing error.
*/
protected void doneParsing()
throws SAXException
{
if (dataSourceHandler != null)
{
element.setDataSource((DataSource) dataSourceHandler.getObject());
}
for (int i = 0; i < styleExpressionHandlers.size(); i++)
{
final StyleExpressionHandler handler =
(StyleExpressionHandler) styleExpressionHandlers.get(i);
final StyleKey key = handler.getKey();
if (handler.getKey() != null)
{
final Expression expression = handler.getExpression();
element.setStyleExpression(key, expression);
}
}
element.setAttribute(AttributeNames.Core.NAMESPACE, AttributeNames.Core.SOURCE, getRootHandler().getSource());
}
/**
* Returns the object for this element or null, if this element does not create an object.
*
* @return the object.
*/
public Object getObject()
{
return element;
}
}