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: ContentElementReadHandler.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.ContentElement; 034 import org.jfree.report.structure.Element; 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, 14:38:32 042 * 043 * @author Thomas Morgner 044 */ 045 public class ContentElementReadHandler extends AbstractElementReadHandler 046 { 047 private ValueExpressionReadHandler valueExpressionReadHandler; 048 private ContentElement ce; 049 050 public ContentElementReadHandler() 051 { 052 ce = new ContentElement(); 053 } 054 055 /** 056 * Starts parsing. 057 * 058 * @param attrs the attributes. 059 * @throws org.xml.sax.SAXException if there is a parsing error. 060 */ 061 protected void startParsing(final Attributes attrs) throws SAXException 062 { 063 super.startParsing(attrs); 064 final String format = attrs.getValue(FlowReportFactoryModule.NAMESPACE, "format"); 065 ce.setAttribute(FlowReportFactoryModule.NAMESPACE, "format", format); 066 } 067 068 /** 069 * Returns the handler for a child element. 070 * 071 * @param tagName the tag name. 072 * @param atts the attributes. 073 * @return the handler or null, if the tagname is invalid. 074 * @throws SAXException if there is a parsing error. 075 */ 076 protected XmlReadHandler getHandlerForChild(final String uri, 077 final String tagName, 078 final Attributes atts) 079 throws SAXException 080 { 081 if (isSameNamespace(uri) == false) 082 { 083 return null; 084 } 085 if ("value-expression".equals(tagName)) 086 { 087 valueExpressionReadHandler = new ValueExpressionReadHandler(); 088 return valueExpressionReadHandler; 089 } 090 return super.getHandlerForChild(uri, tagName, atts); 091 } 092 093 /** 094 * Done parsing. 095 * 096 * @throws SAXException if there is a parsing error. 097 */ 098 protected void doneParsing() throws SAXException 099 { 100 if (valueExpressionReadHandler == null) 101 { 102 throw new ParseException("No valid value expression.", getLocator()); 103 } 104 105 super.doneParsing(); 106 configureElement(ce); 107 ce.setValueExpression(valueExpressionReadHandler.getExpression()); 108 } 109 110 /** 111 * Returns the object for this element or null, if this element does not 112 * create an object. 113 * 114 * @return the object. 115 * @throws SAXException if there's a parsing error 116 */ 117 public Object getObject() throws SAXException 118 { 119 return ce; 120 } 121 122 protected Element getElement() 123 { 124 return ce; 125 } 126 }