1/*
2 * reserved comment block
3 * DO NOT REMOVE OR ALTER!
4 */
5/*
6 * Licensed to the Apache Software Foundation (ASF) under one or more
7 * contributor license agreements.  See the NOTICE file distributed with
8 * this work for additional information regarding copyright ownership.
9 * The ASF licenses this file to You under the Apache License, Version 2.0
10 * (the "License"); you may not use this file except in compliance with
11 * the License.  You may obtain a copy of the License at
12 *
13 *      http://www.apache.org/licenses/LICENSE-2.0
14 *
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
20 */
21
22package com.sun.org.apache.xpath.internal.functions;
23
24import com.sun.org.apache.xpath.internal.XPathContext;
25import com.sun.org.apache.xpath.internal.objects.XBoolean;
26import com.sun.org.apache.xpath.internal.objects.XObject;
27
28/**
29 * Execute the Contains() function.
30 * @xsl.usage advanced
31 */
32public class FuncContains extends Function2Args
33{
34    static final long serialVersionUID = 5084753781887919723L;
35
36  /**
37   * Execute the function.  The function must return
38   * a valid object.
39   * @param xctxt The current execution context.
40   * @return A valid XObject.
41   *
42   * @throws javax.xml.transform.TransformerException
43   */
44  public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
45  {
46
47    String s1 = m_arg0.execute(xctxt).str();
48    String s2 = m_arg1.execute(xctxt).str();
49
50    // Add this check for JDK consistency for empty strings.
51    if (s1.length() == 0 && s2.length() == 0)
52      return XBoolean.S_TRUE;
53
54    int index = s1.indexOf(s2);
55
56    return (index > -1) ? XBoolean.S_TRUE : XBoolean.S_FALSE;
57  }
58}
59