Home | History | Annotate | Download | only in templates 
      1 /*
      2  * Licensed to the Apache Software Foundation (ASF) under one
      3  * or more contributor license agreements. See the NOTICE file
      4  * distributed with this work for additional information
      5  * regarding copyright ownership. The ASF licenses this file
      6  * to you under the Apache License, Version 2.0 (the  "License");
      7  * you may not use this file except in compliance with the License.
      8  * You may obtain a copy of the License at
      9  *
     10  *     http://www.apache.org/licenses/LICENSE-2.0
     11  *
     12  * Unless required by applicable law or agreed to in writing, software
     13  * distributed under the License is distributed on an "AS IS" BASIS,
     14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     15  * See the License for the specific language governing permissions and
     16  * limitations under the License.
     17  */
     18 /*
     19  * $Id: ElemWhen.java 468643 2006-10-28 06:56:03Z minchau $
     20  */
     21 package org.apache.xalan.templates;
     22 
     23 import org.apache.xpath.XPath;
     24 
     25 /**
     26  * Implement xsl:when.
     27  * <pre>
     28  * <!ELEMENT xsl:when %template;>
     29  * <!ATTLIST xsl:when
     30  *   test %expr; #REQUIRED
     31  *   %space-att;
     32  * >
     33  * </pre>
     34  * @see <a href="http://www.w3.org/TR/xslt#section-Conditional-Processing-with-xsl:choose">XXX in XSLT Specification</a>
     35  * @xsl.usage advanced
     36  */
     37 public class ElemWhen extends ElemTemplateElement
     38 {
     39     static final long serialVersionUID = 5984065730262071360L;
     40 
     41   /**
     42    * Each xsl:when element has a single attribute, test,
     43    * which specifies an expression.
     44    * @serial
     45    */
     46   private XPath m_test;
     47 
     48   /**
     49    * Set the "test" attribute.
     50    * Each xsl:when element has a single attribute, test,
     51    * which specifies an expression.
     52    *
     53    * @param v Value to set for the "test" attribute.
     54    */
     55   public void setTest(XPath v)
     56   {
     57     m_test = v;
     58   }
     59 
     60   /**
     61    * Get the "test" attribute.
     62    * Each xsl:when element has a single attribute, test,
     63    * which specifies an expression.
     64    *
     65    * @return Value of the "test" attribute.
     66    */
     67   public XPath getTest()
     68   {
     69     return m_test;
     70   }
     71 
     72   /**
     73    * Get an integer representation of the element type.
     74    *
     75    * @return An integer representation of the element, defined in the
     76    *     Constants class.
     77    * @see org.apache.xalan.templates.Constants
     78    */
     79   public int getXSLToken()
     80   {
     81     return Constants.ELEMNAME_WHEN;
     82   }
     83 
     84   /**
     85    * This function is called after everything else has been
     86    * recomposed, and allows the template to set remaining
     87    * values that may be based on some other property that
     88    * depends on recomposition.
     89    */
     90   public void compose(StylesheetRoot sroot)
     91     throws javax.xml.transform.TransformerException
     92   {
     93     super.compose(sroot);
     94     java.util.Vector vnames = sroot.getComposeState().getVariableNames();
     95     if(null != m_test)
     96       m_test.fixupVariables(vnames, sroot.getComposeState().getGlobalsSize());
     97   }
     98 
     99   /**
    100    * Return the node name.
    101    *
    102    * @return The node name
    103    */
    104   public String getNodeName()
    105   {
    106     return Constants.ELEMNAME_WHEN_STRING;
    107   }
    108 
    109   /**
    110    * Constructor ElemWhen
    111    *
    112    */
    113   public ElemWhen(){}
    114 
    115   /**
    116    * Call the children visitors.
    117    * @param visitor The visitor whose appropriate method will be called.
    118    */
    119   protected void callChildVisitors(XSLTVisitor visitor, boolean callAttrs)
    120   {
    121   	if(callAttrs)
    122   		m_test.getExpression().callVisitors(m_test, visitor);
    123     super.callChildVisitors(visitor, callAttrs);
    124   }
    125 
    126 }
    127