| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 1999, Lotus |
| * Development Corporation., http://www.lotus.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package org.apache.xalan.templates; |
| |
| //import org.w3c.dom.*; |
| import org.apache.xml.dtm.DTM; |
| |
| import org.xml.sax.*; |
| |
| import org.apache.xpath.*; |
| import org.apache.xpath.objects.XObject; |
| import org.apache.xalan.trace.SelectionEvent; |
| import org.apache.xml.utils.QName; |
| import org.apache.xalan.res.XSLTErrorResources; |
| import org.apache.xalan.transformer.TransformerImpl; |
| |
| import javax.xml.transform.TransformerException; |
| |
| /** |
| * <meta name="usage" content="advanced"/> |
| * 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> |
| */ |
| public class ElemIf extends ElemTemplateElement |
| { |
| |
| /** |
| * 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. |
| * |
| * NEEDSDOC @param sroot |
| * |
| * @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. |
| * @param sourceNode non-null reference to the <a href="http://www.w3.org/TR/xslt#dt-current-node">current source node</a>. |
| * @param mode reference, which may be null, to the <a href="http://www.w3.org/TR/xslt#modes">current mode</a>. |
| * |
| * @throws TransformerException |
| */ |
| public void execute(TransformerImpl transformer) throws TransformerException |
| { |
| |
| if (TransformerImpl.S_DEBUG) |
| transformer.getTraceManager().fireTraceEvent(this); |
| |
| XPathContext xctxt = transformer.getXPathContext(); |
| int sourceNode = xctxt.getCurrentNode(); |
| |
| if (TransformerImpl.S_DEBUG) |
| { |
| XObject test = m_test.execute(xctxt, sourceNode, this); |
| |
| if (TransformerImpl.S_DEBUG) |
| transformer.getTraceManager().fireSelectedEvent(sourceNode, this, |
| "test", m_test, test); |
| |
| if (test.bool()) |
| { |
| transformer.executeChildTemplates(this, true); |
| } |
| |
| // I don't think we want this. -sb |
| // if (TransformerImpl.S_DEBUG) |
| // transformer.getTraceManager().fireSelectedEvent(sourceNode, this, |
| // "endTest", m_test, test); |
| } |
| else if (m_test.bool(xctxt, sourceNode, this)) |
| { |
| transformer.executeChildTemplates(this, true); |
| } |
| } |
| } |