- /*
- * 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.
- *
- * @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.
- * @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
- {
-
- 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())
- {
- // Note that there was a bad incompatibility with xsl:if...
- // which was called whether the test was successful or not.
- // With the current logic of xsl:for-each,
- // if the node-set is empty trace will not be called at all.
- // So I've changed xsl:if to match the xsl:for-each behavior.
- // -sb
-
- if (TransformerImpl.S_DEBUG)
- transformer.getTraceManager().fireTraceEvent(this);
-
- transformer.executeChildTemplates(this, true);
-
- if (TransformerImpl.S_DEBUG)
- transformer.getTraceManager().fireTraceEndEvent(this);
- }
-
- // 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);
- }
-
- }
-
- /**
- * 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);
- }
-
- }