| /* |
| * 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. |
| * <pre> |
| * <!ELEMENT xsl:if %template;> |
| * <!ATTLIST xsl:if |
| * test %expr; #REQUIRED |
| * %space-att; |
| * > |
| * </pre> |
| * @see <a href="http://www.w3.org/TR/xslt#section-Conditional-Processing-with-xsl:if">XXX in XSLT Specification</a> |
| * @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); |
| } |
| |
| } |