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 */
21package org.apache.xalan.templates;
22
23import 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 */
37public 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