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: AttributeExpressionReadHandler.java,v 1.6 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.xmlns.parser.ParseException;
034 import org.jfree.xmlns.parser.StringReadHandler;
035 import org.jfree.xmlns.parser.XmlReadHandler;
036 import org.xml.sax.Attributes;
037 import org.xml.sax.SAXException;
038
039 /**
040 * Creation-Date: 09.04.2006, 13:40:08
041 *
042 * @author Thomas Morgner
043 */
044 public class AttributeExpressionReadHandler
045 extends AbstractExpressionReadHandler
046 {
047 private StringReadHandler nameReadHandler;
048 private StringReadHandler namespaceUriReadHandler;
049 private String attributeName;
050 private String namespace;
051
052 public AttributeExpressionReadHandler()
053 {
054 }
055
056 /**
057 * Returns the handler for a child element.
058 *
059 * @param tagName the tag name.
060 * @param atts the attributes.
061 * @return the handler or null, if the tagname is invalid.
062 * @throws SAXException if there is a parsing error.
063 */
064 protected XmlReadHandler getHandlerForChild(final String uri,
065 final String tagName,
066 final Attributes atts)
067 throws SAXException
068 {
069 if (isSameNamespace(uri) == false)
070 {
071 return null;
072 }
073 if (tagName.equals("attribute-name"))
074 {
075 nameReadHandler = new StringReadHandler();
076 return nameReadHandler;
077 }
078 if (tagName.equals("attribute-namespace-uri"))
079 {
080 namespaceUriReadHandler = new StringReadHandler();
081 return namespaceUriReadHandler;
082 }
083 return super.getHandlerForChild(uri, tagName, atts);
084 }
085
086 /**
087 * Done parsing.
088 *
089 * @throws SAXException if there is a parsing error.
090 */
091 protected void doneParsing() throws SAXException
092 {
093 super.doneParsing();
094 if (nameReadHandler == null)
095 {
096 throw new ParseException
097 ("Required element 'attribute-name' is missing.", getLocator());
098 }
099
100 attributeName = nameReadHandler.getResult();
101
102 if (namespaceUriReadHandler != null)
103 {
104 namespace = namespaceUriReadHandler.getResult();
105 }
106 if (namespace == null)
107 {
108 namespace = getNamespace();
109 }
110
111 }
112
113 public String getNamespace()
114 {
115 return namespace;
116 }
117
118 public String getAttributeName()
119 {
120 return attributeName;
121 }
122 }