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1: /** 2: * ======================================== 3: * JFreeReport : a free Java report library 4: * ======================================== 5: * 6: * Project Info: http://reporting.pentaho.org/ 7: * 8: * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors. 9: * 10: * This library is free software; you can redistribute it and/or modify it under the terms 11: * of the GNU Lesser General Public License as published by the Free Software Foundation; 12: * either version 2.1 of the License, or (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 15: * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 16: * See the GNU Lesser General Public License for more details. 17: * 18: * You should have received a copy of the GNU Lesser General Public License along with this 19: * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, 20: * Boston, MA 02111-1307, USA. 21: * 22: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 23: * in the United States and other countries.] 24: * 25: * ------------ 26: * $Id: GroupReadHandler.java 3525 2007-10-16 11:43:48Z tmorgner $ 27: * ------------ 28: * (C) Copyright 2000-2005, by Object Refinery Limited. 29: * (C) Copyright 2005-2007, by Pentaho Corporation. 30: */ 31: package org.jfree.report.modules.factories.report.flow; 32: 33: import org.jfree.report.structure.Element; 34: import org.jfree.report.structure.Group; 35: import org.jfree.xmlns.parser.XmlReadHandler; 36: import org.jfree.xmlns.parser.ParseException; 37: import org.xml.sax.Attributes; 38: import org.xml.sax.SAXException; 39: 40: /** 41: * Creation-Date: 09.04.2006, 15:37:31 42: * 43: * @author Thomas Morgner 44: */ 45: public class GroupReadHandler extends SectionReadHandler 46: { 47: private Group group; 48: private GroupingExpressionReadHandler groupingExpressionReadHandler; 49: 50: public GroupReadHandler() 51: { 52: group = new Group(); 53: } 54: 55: /** 56: * Returns the handler for a child element. 57: * 58: * @param tagName the tag name. 59: * @param atts the attributes. 60: * @return the handler or null, if the tagname is invalid. 61: * @throws SAXException if there is a parsing error. 62: */ 63: protected XmlReadHandler getHandlerForChild(final String uri, 64: final String tagName, 65: final Attributes atts) 66: throws SAXException 67: { 68: final XmlReadHandler base = super.getHandlerForChild(uri, tagName, atts); 69: if (base != null) 70: { 71: return base; 72: } 73: if (FlowReportFactoryModule.NAMESPACE.equals(uri)) 74: { 75: if ("grouping-expression".equals(tagName)) 76: { 77: groupingExpressionReadHandler = new GroupingExpressionReadHandler(); 78: return groupingExpressionReadHandler; 79: } 80: } 81: return null; 82: } 83: 84: /** 85: * Done parsing. 86: * 87: * @throws SAXException if there is a parsing error. 88: */ 89: protected void doneParsing() throws SAXException 90: { 91: if (groupingExpressionReadHandler == null) 92: { 93: throw new ParseException 94: ("Required element 'grouping-expression' is missing.", getLocator()); 95: } 96: 97: super.doneParsing(); 98: final Group group = (Group) getElement(); 99: group.setGroupingExpression(groupingExpressionReadHandler.getExpression()); 100: } 101: 102: protected Element getElement() 103: { 104: return group; 105: } 106: }