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Java > Open Source Codes > org > apache > slide > search > basic > expression > PropContainsExpression


1 /*
2  * $Header: /home/cvs/jakarta-slide/src/share/org/apache/slide/search/basic/expression/PropContainsExpression.java,v 1.4 2004/07/28 09:34:49 ib Exp $
3  * $Revision: 1.4 $
4  * $Date: 2004/07/28 09:34:49 $
5  *
6  * ====================================================================
7  *
8  * Copyright 1999 - 2002 The Apache Software Foundation
9  *
10  * Licensed under the Apache License, Version 2.0 (the "License");
11  * you may not use this file except in compliance with the License.
12  * You may obtain a copy of the License at
13  *
14  * http://www.apache.org/licenses/LICENSE-2.0
15  *
16  * Unless required by applicable law or agreed to in writing, software
17  * distributed under the License is distributed on an "AS IS" BASIS,
18  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19  * See the License for the specific language governing permissions and
20  * limitations under the License.
21  *
22  */
23
24 package org.apache.slide.search.basic.expression;
25
26 import org.apache.slide.search.InvalidQueryException;
27 import org.apache.slide.search.basic.ComparableResource;
28 import org.apache.slide.search.basic.ComparableResourcesPool;
29 import org.apache.slide.search.basic.Literals;
30 import org.jdom.Element;
31
32 /**
33  * Represents an EQUALS expression.
34  *
35  * @version $Revision: 1.4 $
36  */
37 public class PropContainsExpression extends ComparePropertyExpression {
38     
39     /**
40      * Creates an EQ expression according to Element e
41      *
42      * @param e jdom element, that describes the expression
43      * @param requestedResourcesPool the pool of resources to apply the expression to.
44      */
45     public PropContainsExpression (Element e, ComparableResourcesPool requestedResourcesPool) throws InvalidQueryException {
46         super(e, requestedResourcesPool, true);
47     }
48        
49     /**
50      * Checks item for equality against <prop><literal> of this expression.
51      *
52      * @param item a BasicDataItem
53      *
54      * @return a boolean
55      *
56      */
57     protected boolean compare (ComparableResource item) {
58         return item.propContains (
59             comparedProperty.getProperty(),
60             comparedProperty.getPropNamespace(),
61             comparedProperty.getLiteral()) == Literals.TRUE;
62     }
63     
64
65     /**
66      * For debugging purpose.
67      *
68      * @return This expression as string
69      *
70      */
71     public String JavaDoc toString () {
72         return super.toString (Literals.EQ);
73     }
74 }
75
76
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