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Java > Open Source Codes > org > apache > forrest > sourcetype > ProcessingInstructionRule


1 /*
2  * Copyright 2001-2004 The Apache Software Foundation or its licensors,
3  * as applicable.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 package org.apache.forrest.sourcetype;
18
19 import org.apache.avalon.framework.configuration.Configuration;
20 import org.apache.avalon.framework.configuration.ConfigurationException;
21
22 /**
23  * A rule which checks that a processing instruction with certain data is present.
24  */
25 public class ProcessingInstructionRule implements SourceTypeRule
26 {
27     protected String JavaDoc target;
28     protected String JavaDoc data;
29
30     public void configure(Configuration configuration) throws ConfigurationException
31     {
32         target = configuration.getAttribute("target");
33         data = configuration.getAttribute("data", null);
34     }
35
36     public boolean matches(SourceInfo sourceInfo)
37     {
38         if (sourceInfo.hasProcessingInstruction(target))
39         {
40             if (sourceInfo.getProcessingInstructionData(target) == null && data == null)
41                 return true;
42             if (sourceInfo.getProcessingInstructionData(target) != null && sourceInfo.getProcessingInstructionData(target).equals(data))
43                 return true;
44         }
45         return false;
46     }
47
48 }
49
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