001 /** 002 * ======================================== 003 * JFreeReport : a free Java report library 004 * ======================================== 005 * 006 * Project Info: http://reporting.pentaho.org/ 007 * 008 * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors. 009 * 010 * This library is free software; you can redistribute it and/or modify it under the terms 011 * of the GNU Lesser General Public License as published by the Free Software Foundation; 012 * either version 2.1 of the License, or (at your option) any later version. 013 * 014 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 015 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 016 * See the GNU Lesser General Public License for more details. 017 * 018 * You should have received a copy of the GNU Lesser General Public License along with this 019 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, 020 * Boston, MA 02111-1307, USA. 021 * 022 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 023 * in the United States and other countries.] 024 * 025 * ------------ 026 * $Id: GroupReadHandler.java 3525 2007-10-16 11:43:48Z tmorgner $ 027 * ------------ 028 * (C) Copyright 2000-2005, by Object Refinery Limited. 029 * (C) Copyright 2005-2007, by Pentaho Corporation. 030 */ 031 package org.jfree.report.modules.factories.report.flow; 032 033 import org.jfree.report.structure.Element; 034 import org.jfree.report.structure.Group; 035 import org.jfree.xmlns.parser.XmlReadHandler; 036 import org.jfree.xmlns.parser.ParseException; 037 import org.xml.sax.Attributes; 038 import org.xml.sax.SAXException; 039 040 /** 041 * Creation-Date: 09.04.2006, 15:37:31 042 * 043 * @author Thomas Morgner 044 */ 045 public class GroupReadHandler extends SectionReadHandler 046 { 047 private Group group; 048 private GroupingExpressionReadHandler groupingExpressionReadHandler; 049 050 public GroupReadHandler() 051 { 052 group = new Group(); 053 } 054 055 /** 056 * Returns the handler for a child element. 057 * 058 * @param tagName the tag name. 059 * @param atts the attributes. 060 * @return the handler or null, if the tagname is invalid. 061 * @throws SAXException if there is a parsing error. 062 */ 063 protected XmlReadHandler getHandlerForChild(final String uri, 064 final String tagName, 065 final Attributes atts) 066 throws SAXException 067 { 068 final XmlReadHandler base = super.getHandlerForChild(uri, tagName, atts); 069 if (base != null) 070 { 071 return base; 072 } 073 if (FlowReportFactoryModule.NAMESPACE.equals(uri)) 074 { 075 if ("grouping-expression".equals(tagName)) 076 { 077 groupingExpressionReadHandler = new GroupingExpressionReadHandler(); 078 return groupingExpressionReadHandler; 079 } 080 } 081 return null; 082 } 083 084 /** 085 * Done parsing. 086 * 087 * @throws SAXException if there is a parsing error. 088 */ 089 protected void doneParsing() throws SAXException 090 { 091 if (groupingExpressionReadHandler == null) 092 { 093 throw new ParseException 094 ("Required element 'grouping-expression' is missing.", getLocator()); 095 } 096 097 super.doneParsing(); 098 final Group group = (Group) getElement(); 099 group.setGroupingExpression(groupingExpressionReadHandler.getExpression()); 100 } 101 102 protected Element getElement() 103 { 104 return group; 105 } 106 }