1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 /* 19 * $Id: ProcessorNamespaceAlias.java 468640 2006-10-28 06:53:53Z minchau $ 20 */ 21 package org.apache.xalan.processor; 22 23 import org.apache.xalan.res.XSLTErrorResources; 24 import org.apache.xalan.templates.NamespaceAlias; 25 import org.xml.sax.Attributes; 26 27 /** 28 * TransformerFactory for xsl:namespace-alias markup. 29 * A stylesheet can use the xsl:namespace-alias element to 30 * declare that one namespace URI is an alias for another namespace URI. 31 * <pre> 32 * <!ELEMENT xsl:namespace-alias EMPTY> 33 * <!ATTLIST xsl:namespace-alias 34 * stylesheet-prefix CDATA #REQUIRED 35 * result-prefix CDATA #REQUIRED 36 * > 37 * </pre> 38 * @see <a href="http://www.w3.org/TR/xslt#dtd">XSLT DTD</a> 39 * @see <a href="http://www.w3.org/TR/xslt#literal-result-element">literal-result-element in XSLT Specification</a> 40 */ 41 class ProcessorNamespaceAlias extends XSLTElementProcessor 42 { 43 static final long serialVersionUID = -6309867839007018964L; 44 45 /** 46 * Receive notification of the start of an xsl:namespace-alias element. 47 * 48 * @param handler The calling StylesheetHandler/TemplatesBuilder. 49 * @param uri The Namespace URI, or the empty string if the 50 * element has no Namespace URI or if Namespace 51 * processing is not being performed. 52 * @param localName The local name (without prefix), or the 53 * empty string if Namespace processing is not being 54 * performed. 55 * @param rawName The raw XML 1.0 name (with prefix), or the 56 * empty string if raw names are not available. 57 * @param attributes The attributes attached to the element. If 58 * there are no attributes, it shall be an empty 59 * Attributes object. 60 */ 61 public void startElement( 62 StylesheetHandler handler, String uri, String localName, String rawName, Attributes attributes) 63 throws org.xml.sax.SAXException 64 { 65 final String resultNS; 66 NamespaceAlias na = new NamespaceAlias(handler.nextUid()); 67 68 setPropertiesFromAttributes(handler, rawName, attributes, na); 69 String prefix = na.getStylesheetPrefix(); 70 if(prefix.equals("#default")) 71 { 72 prefix = ""; 73 na.setStylesheetPrefix(prefix); 74 } 75 String stylesheetNS = handler.getNamespaceForPrefix(prefix); 76 na.setStylesheetNamespace(stylesheetNS); 77 prefix = na.getResultPrefix(); 78 if(prefix.equals("#default")) 79 { 80 prefix = ""; 81 na.setResultPrefix(prefix); 82 resultNS = handler.getNamespaceForPrefix(prefix); 83 if(null == resultNS) 84 handler.error(XSLTErrorResources.ER_INVALID_NAMESPACE_URI_VALUE_FOR_RESULT_PREFIX_FOR_DEFAULT, null, null); 85 } 86 else 87 { 88 resultNS = handler.getNamespaceForPrefix(prefix); 89 if(null == resultNS) 90 handler.error(XSLTErrorResources.ER_INVALID_NAMESPACE_URI_VALUE_FOR_RESULT_PREFIX, new Object[] {prefix}, null); 91 } 92 93 na.setResultNamespace(resultNS); 94 handler.getStylesheet().setNamespaceAlias(na); 95 handler.getStylesheet().appendChild(na); 96 } 97 } 98
