001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018 /*
019 * $Id: ProcessorNamespaceAlias.java 468640 2006-10-28 06:53:53Z minchau $
020 */
021 package org.apache.xalan.processor;
022
023 import org.apache.xalan.res.XSLTErrorResources;
024 import org.apache.xalan.templates.NamespaceAlias;
025 import org.xml.sax.Attributes;
026
027 /**
028 * TransformerFactory for xsl:namespace-alias markup.
029 * A stylesheet can use the xsl:namespace-alias element to
030 * declare that one namespace URI is an alias for another namespace URI.
031 * <pre>
032 * <!ELEMENT xsl:namespace-alias EMPTY>
033 * <!ATTLIST xsl:namespace-alias
034 * stylesheet-prefix CDATA #REQUIRED
035 * result-prefix CDATA #REQUIRED
036 * >
037 * </pre>
038 * @see <a href="http://www.w3.org/TR/xslt#dtd">XSLT DTD</a>
039 * @see <a href="http://www.w3.org/TR/xslt#literal-result-element">literal-result-element in XSLT Specification</a>
040 */
041 class ProcessorNamespaceAlias extends XSLTElementProcessor
042 {
043 static final long serialVersionUID = -6309867839007018964L;
044
045 /**
046 * Receive notification of the start of an xsl:namespace-alias element.
047 *
048 * @param handler The calling StylesheetHandler/TemplatesBuilder.
049 * @param uri The Namespace URI, or the empty string if the
050 * element has no Namespace URI or if Namespace
051 * processing is not being performed.
052 * @param localName The local name (without prefix), or the
053 * empty string if Namespace processing is not being
054 * performed.
055 * @param rawName The raw XML 1.0 name (with prefix), or the
056 * empty string if raw names are not available.
057 * @param attributes The attributes attached to the element. If
058 * there are no attributes, it shall be an empty
059 * Attributes object.
060 */
061 public void startElement(
062 StylesheetHandler handler, String uri, String localName, String rawName, Attributes attributes)
063 throws org.xml.sax.SAXException
064 {
065 final String resultNS;
066 NamespaceAlias na = new NamespaceAlias(handler.nextUid());
067
068 setPropertiesFromAttributes(handler, rawName, attributes, na);
069 String prefix = na.getStylesheetPrefix();
070 if(prefix.equals("#default"))
071 {
072 prefix = "";
073 na.setStylesheetPrefix(prefix);
074 }
075 String stylesheetNS = handler.getNamespaceForPrefix(prefix);
076 na.setStylesheetNamespace(stylesheetNS);
077 prefix = na.getResultPrefix();
078 if(prefix.equals("#default"))
079 {
080 prefix = "";
081 na.setResultPrefix(prefix);
082 resultNS = handler.getNamespaceForPrefix(prefix);
083 if(null == resultNS)
084 handler.error(XSLTErrorResources.ER_INVALID_NAMESPACE_URI_VALUE_FOR_RESULT_PREFIX_FOR_DEFAULT, null, null);
085 }
086 else
087 {
088 resultNS = handler.getNamespaceForPrefix(prefix);
089 if(null == resultNS)
090 handler.error(XSLTErrorResources.ER_INVALID_NAMESPACE_URI_VALUE_FOR_RESULT_PREFIX, new Object[] {prefix}, null);
091 }
092
093 na.setResultNamespace(resultNS);
094 handler.getStylesheet().setNamespaceAlias(na);
095 handler.getStylesheet().appendChild(na);
096 }
097 }