/*
* 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.bundle.layout;
import org.pentaho.reporting.engine.classic.core.ReportDefinition;
import org.pentaho.reporting.engine.classic.core.modules.parser.base.ReportParserUtil;
import org.pentaho.reporting.engine.classic.core.style.ElementStyleSheet;
import org.pentaho.reporting.engine.classic.core.style.StyleSheetCollection;
import org.pentaho.reporting.libraries.base.util.StringUtils;
import org.pentaho.reporting.libraries.xmlns.parser.AbstractXmlReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.ParseException;
import org.pentaho.reporting.libraries.xmlns.parser.XmlReadHandler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
/**
* Todo: Document Me
*
* @author Thomas Morgner
*/
public class StyleRuleReadHandler extends AbstractXmlReadHandler
{
private ElementStyleSheet styleSheet;
public StyleRuleReadHandler()
{
}
/**
* Starts parsing.
*
* @param attrs the attributes.
* @throws SAXException if there is a parsing error.
*/
protected void startParsing(final Attributes attrs) throws SAXException
{
final Object maybeReport = getRootHandler().getHelperObject
(ReportParserUtil.HELPER_OBJ_REPORT_NAME);
if (maybeReport instanceof ReportDefinition == false)
{
throw new ParseException("Invalid internal configuration for 'report-obj'", getLocator());
}
final ReportDefinition def = (ReportDefinition) maybeReport;
final StyleSheetCollection styleSheetCollection = def.getStyleSheetCollection();
final String name = attrs.getValue(getUri(), "name");
if (name == null)
{
throw new ParseException("Required attribute 'name' is not defined.", getLocator());
}
styleSheet = styleSheetCollection.createStyleSheet(name);
final String parent = attrs.getValue(getUri(), "parent");
if (parent != null)
{
final String[] classes = StringUtils.split(parent, " ", "'");
for (int i = 0; i < classes.length; i++)
{
final String aClass = classes[i];
final ElementStyleSheet parentStyleSheet = styleSheetCollection.createStyleSheet(aClass);
try
{
styleSheet.addParent(parentStyleSheet);
}
catch (IllegalArgumentException e)
{
throw new ParseException("Loop detected: Specified parent style-sheet is invalid here.", e, getLocator());
}
}
}
}
/**
* Returns the handler for a child element.
*
* @param uri the URI of the namespace of the current element.
* @param tagName the tag name.
* @param atts the attributes.
* @return the handler or null, if the tagname is invalid.
* @throws SAXException if there is a parsing error.
*/
protected XmlReadHandler getHandlerForChild(final String uri,
final String tagName,
final Attributes atts) throws SAXException
{
final StyleReadHandler readHandler = (StyleReadHandler)
StyleReadHandlerFactory.getInstance().getHandler(uri, tagName);
if (readHandler == null)
{
throw new ParseException("Unable to locate style-handler for <" + uri + '|' + tagName + '>', getLocator());
}
readHandler.setStyleSheet(styleSheet);
return readHandler;
}
/**
* Returns the object for this element or null, if this element does not create an object.
*
* @return the object.
* @throws SAXException if an parser error occured.
*/
public Object getObject() throws SAXException
{
return styleSheet;
}
}