19f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/* 29f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Licensed to the Apache Software Foundation (ASF) under one 39f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * or more contributor license agreements. See the NOTICE file 49f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * distributed with this work for additional information 59f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * regarding copyright ownership. The ASF licenses this file 69f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * to you under the Apache License, Version 2.0 (the "License"); 79f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * you may not use this file except in compliance with the License. 89f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * You may obtain a copy of the License at 99f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 109f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * http://www.apache.org/licenses/LICENSE-2.0 119f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 129f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Unless required by applicable law or agreed to in writing, software 139f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * distributed under the License is distributed on an "AS IS" BASIS, 149f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 159f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * See the License for the specific language governing permissions and 169f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * limitations under the License. 179f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 189f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/* 199f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * $Id: ElemIf.java 468643 2006-10-28 06:56:03Z minchau $ 209f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 219f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpackage org.apache.xalan.templates; 229f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 239f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport javax.xml.transform.TransformerException; 249f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 259f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xalan.transformer.TransformerImpl; 269f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.XPath; 279f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.XPathContext; 289f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonimport org.apache.xpath.objects.XObject; 299f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 309f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson/** 319f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Implement xsl:if. 329f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * <pre> 339f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * <!ELEMENT xsl:if %template;> 349f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * <!ATTLIST xsl:if 359f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * test %expr; #REQUIRED 369f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * %space-att; 379f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * > 389f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * </pre> 399f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @see <a href="http://www.w3.org/TR/xslt#section-Conditional-Processing-with-xsl:if">XXX in XSLT Specification</a> 409f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @xsl.usage advanced 419f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 429f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilsonpublic class ElemIf extends ElemTemplateElement 439f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson{ 449f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson static final long serialVersionUID = 2158774632427453022L; 459f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 469f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 479f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * The xsl:if element must have a test attribute, which specifies an expression. 489f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @serial 499f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 509f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson private XPath m_test = null; 519f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 529f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 539f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Set the "test" attribute. 549f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * The xsl:if element must have a test attribute, which specifies an expression. 559f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 569f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param v test attribute to set 579f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 589f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void setTest(XPath v) 599f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 609f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_test = v; 619f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 629f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 639f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 649f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Get the "test" attribute. 659f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * The xsl:if element must have a test attribute, which specifies an expression. 669f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 679f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return the "test" attribute for this element. 689f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 699f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public XPath getTest() 709f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 719f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return m_test; 729f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 739f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 749f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 759f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * This function is called after everything else has been 769f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * recomposed, and allows the template to set remaining 779f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * values that may be based on some other property that 789f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * depends on recomposition. 799f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 809f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param sroot The root stylesheet. 819f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 829f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @throws TransformerException 839f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 849f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void compose(StylesheetRoot sroot) throws TransformerException 859f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 869f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 879f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson super.compose(sroot); 889f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 899f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson java.util.Vector vnames = sroot.getComposeState().getVariableNames(); 909f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 919f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (null != m_test) 929f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_test.fixupVariables(vnames, sroot.getComposeState().getGlobalsSize()); 939f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 949f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 959f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 969f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Get an int constant identifying the type of element. 979f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @see org.apache.xalan.templates.Constants 989f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 999f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return The token ID for this element 1009f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 1019f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public int getXSLToken() 1029f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1039f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return Constants.ELEMNAME_IF; 1049f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1059f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1069f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 1079f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Return the node name. 1089f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 1099f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @return the element's name 1109f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 1119f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public String getNodeName() 1129f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1139f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson return Constants.ELEMNAME_IF_STRING; 1149f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1159f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1169f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 1179f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Conditionally execute a sub-template. 1189f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * The expression is evaluated and the resulting object is converted 1199f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * to a boolean as if by a call to the boolean function. If the result 1209f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * is true, then the content template is instantiated; otherwise, nothing 1219f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * is created. 1229f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 1239f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param transformer non-null reference to the the current transform-time state. 1249f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * 1259f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @throws TransformerException 1269f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 1279f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson public void execute(TransformerImpl transformer) throws TransformerException 1289f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1299f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1309f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson XPathContext xctxt = transformer.getXPathContext(); 1319f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson int sourceNode = xctxt.getCurrentNode(); 1329f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1339f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if (m_test.bool(xctxt, sourceNode, this)) { 1349f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson transformer.executeChildTemplates(this, true); 1359f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1369f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1379f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1389f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1399f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson /** 1409f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * Call the children visitors. 1419f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson * @param visitor The visitor whose appropriate method will be called. 1429f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson */ 1439f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson protected void callChildVisitors(XSLTVisitor visitor, boolean callAttrs) 1449f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson { 1459f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson if(callAttrs) 1469f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson m_test.getExpression().callVisitors(m_test, visitor); 1479f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson super.callChildVisitors(visitor, callAttrs); 1489f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson } 1499f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson 1509f8118474e9513f7a5b7d2a05e4a0fb15d1a6569Jesse Wilson} 151