/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /* * $Id: ElemIf.java 468643 2006-10-28 06:56:03Z minchau $ */ package org.apache.xalan.templates; import javax.xml.transform.TransformerException; import org.apache.xalan.transformer.TransformerImpl; import org.apache.xpath.XPath; import org.apache.xpath.XPathContext; import org.apache.xpath.objects.XObject; /** * Implement xsl:if. *
 * 
 * 
 * 
* @see XXX in XSLT Specification * @xsl.usage advanced */ public class ElemIf extends ElemTemplateElement { static final long serialVersionUID = 2158774632427453022L; /** * The xsl:if element must have a test attribute, which specifies an expression. * @serial */ private XPath m_test = null; /** * Set the "test" attribute. * The xsl:if element must have a test attribute, which specifies an expression. * * @param v test attribute to set */ public void setTest(XPath v) { m_test = v; } /** * Get the "test" attribute. * The xsl:if element must have a test attribute, which specifies an expression. * * @return the "test" attribute for this element. */ public XPath getTest() { return m_test; } /** * This function is called after everything else has been * recomposed, and allows the template to set remaining * values that may be based on some other property that * depends on recomposition. * * @param sroot The root stylesheet. * * @throws TransformerException */ public void compose(StylesheetRoot sroot) throws TransformerException { super.compose(sroot); java.util.Vector vnames = sroot.getComposeState().getVariableNames(); if (null != m_test) m_test.fixupVariables(vnames, sroot.getComposeState().getGlobalsSize()); } /** * Get an int constant identifying the type of element. * @see org.apache.xalan.templates.Constants * * @return The token ID for this element */ public int getXSLToken() { return Constants.ELEMNAME_IF; } /** * Return the node name. * * @return the element's name */ public String getNodeName() { return Constants.ELEMNAME_IF_STRING; } /** * Conditionally execute a sub-template. * The expression is evaluated and the resulting object is converted * to a boolean as if by a call to the boolean function. If the result * is true, then the content template is instantiated; otherwise, nothing * is created. * * @param transformer non-null reference to the the current transform-time state. * * @throws TransformerException */ public void execute(TransformerImpl transformer) throws TransformerException { XPathContext xctxt = transformer.getXPathContext(); int sourceNode = xctxt.getCurrentNode(); if (m_test.bool(xctxt, sourceNode, this)) { transformer.executeChildTemplates(this, true); } } /** * Call the children visitors. * @param visitor The visitor whose appropriate method will be called. */ protected void callChildVisitors(XSLTVisitor visitor, boolean callAttrs) { if(callAttrs) m_test.getExpression().callVisitors(m_test, visitor); super.callChildVisitors(visitor, callAttrs); } }