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 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.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 ("attribute-name".equals(tagName)) 074 { 075 nameReadHandler = new StringReadHandler(); 076 return nameReadHandler; 077 } 078 if ("attribute-namespace-uri".equals(tagName)) 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 }