code: /*
   * 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.
   */
  /*
   * $Id$
   */
  package org.apache.xalan.templates;
  
  import org.apache.xpath.XPath;
  
  /**
   * Implement xsl:when.
   * <pre>
   * <!ELEMENT xsl:when %template;>
   * <!ATTLIST xsl:when
   *   test %expr; #REQUIRED
   *   %space-att;
   * >
   * </pre>
   * @see <a href="http://www.w3.org/TR/xslt#section-Conditional-Processing-with-xsl:choose">XXX in XSLT Specification</a>
   * @xsl.usage advanced
   */
  public class ElemWhen extends ElemTemplateElement
  {
      static final long serialVersionUID = 5984065730262071360L;
  
    /**
     * Each xsl:when element has a single attribute, test,
     * which specifies an expression.
     * @serial
     */
    private XPath m_test;
  
    /**
     * Set the "test" attribute.
     * Each xsl:when element has a single attribute, test,
     * which specifies an expression.
     *
     * @param v Value to set for the "test" attribute.
     */
    public void setTest(XPath v)
    {
      m_test = v;
    }
  
    /**
     * Get the "test" attribute.
     * Each xsl:when element has a single attribute, test,
     * which specifies an expression.
     *
     * @return Value of the "test" attribute.
     */
    public XPath getTest()
    {
      return m_test;
    }
  
    /**
     * Get an integer representation of the element type.
     *
     * @return An integer representation of the element, defined in the
     *     Constants class.
     * @see org.apache.xalan.templates.Constants
     */
    public int getXSLToken()
    {
      return Constants.ELEMNAME_WHEN;
    }
    
    /**
     * 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.
     */
    public void compose(StylesheetRoot sroot) 
      throws javax.xml.transform.TransformerException
    {
      super.compose(sroot);
      java.util.Vector vnames = sroot.getComposeState().getVariableNames();
      if(null != m_test)
        m_test.fixupVariables(vnames, sroot.getComposeState().getGlobalsSize());
    }
  
    /**
     * Return the node name.
     *
     * @return The node name
     */
    public String getNodeName()
    {
      return Constants.ELEMNAME_WHEN_STRING;
    }
  
    /**
     * Constructor ElemWhen
     *
     */
    public ElemWhen(){}
    
    /**
     * 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);
    }
  
  }
  