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: ElemWhen.java 468643 2006-10-28 06:56:03Z minchau $ 20 */ 21 package org.apache.xalan.templates; 22 23 import org.apache.xpath.XPath; 24 25 /** 26 * Implement xsl:when. 27 * <pre> 28 * <!ELEMENT xsl:when %template;> 29 * <!ATTLIST xsl:when 30 * test %expr; #REQUIRED 31 * %space-att; 32 * > 33 * </pre> 34 * @see <a href="http://www.w3.org/TR/xslt#section-Conditional-Processing-with-xsl:choose">XXX in XSLT Specification</a> 35 * @xsl.usage advanced 36 */ 37 public class ElemWhen extends ElemTemplateElement 38 { 39 static final long serialVersionUID = 5984065730262071360L; 40 41 /** 42 * Each xsl:when element has a single attribute, test, 43 * which specifies an expression. 44 * @serial 45 */ 46 private XPath m_test; 47 48 /** 49 * Set the "test" attribute. 50 * Each xsl:when element has a single attribute, test, 51 * which specifies an expression. 52 * 53 * @param v Value to set for the "test" attribute. 54 */ setTest(XPath v)55 public void setTest(XPath v) 56 { 57 m_test = v; 58 } 59 60 /** 61 * Get the "test" attribute. 62 * Each xsl:when element has a single attribute, test, 63 * which specifies an expression. 64 * 65 * @return Value of the "test" attribute. 66 */ getTest()67 public XPath getTest() 68 { 69 return m_test; 70 } 71 72 /** 73 * Get an integer representation of the element type. 74 * 75 * @return An integer representation of the element, defined in the 76 * Constants class. 77 * @see org.apache.xalan.templates.Constants 78 */ getXSLToken()79 public int getXSLToken() 80 { 81 return Constants.ELEMNAME_WHEN; 82 } 83 84 /** 85 * This function is called after everything else has been 86 * recomposed, and allows the template to set remaining 87 * values that may be based on some other property that 88 * depends on recomposition. 89 */ compose(StylesheetRoot sroot)90 public void compose(StylesheetRoot sroot) 91 throws javax.xml.transform.TransformerException 92 { 93 super.compose(sroot); 94 java.util.Vector vnames = sroot.getComposeState().getVariableNames(); 95 if(null != m_test) 96 m_test.fixupVariables(vnames, sroot.getComposeState().getGlobalsSize()); 97 } 98 99 /** 100 * Return the node name. 101 * 102 * @return The node name 103 */ getNodeName()104 public String getNodeName() 105 { 106 return Constants.ELEMNAME_WHEN_STRING; 107 } 108 109 /** 110 * Constructor ElemWhen 111 * 112 */ ElemWhen()113 public ElemWhen(){} 114 115 /** 116 * Call the children visitors. 117 * @param visitor The visitor whose appropriate method will be called. 118 */ callChildVisitors(XSLTVisitor visitor, boolean callAttrs)119 protected void callChildVisitors(XSLTVisitor visitor, boolean callAttrs) 120 { 121 if(callAttrs) 122 m_test.getExpression().callVisitors(m_test, visitor); 123 super.callChildVisitors(visitor, callAttrs); 124 } 125 126 } 127