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,v 1.8 2007/04/01 18:49:27 taqua Exp $
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 (tagName.equals("value-expression"))
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 }