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Java > Open Source Codes > org > springframework > beans > factory > parsing > NullSourceExtractor


1 /*
2  * Copyright 2002-2006 the original author or authors.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17 package org.springframework.beans.factory.parsing;
18
19 import org.springframework.core.io.Resource;
20
21 /**
22  * Simple implementation of {@link SourceExtractor} that returns <code>null</code>
23  * as the source metadata.
24  *
25  * <p>This is the default implementation and prevents too much metadata from being
26  * held in memory during normal (non-tooled) runtime usage.
27  *
28  * @author Rob Harrop
29  * @since 2.0
30  */
31 public class NullSourceExtractor implements SourceExtractor {
32
33     /**
34      * This implementation simply returns <code>null</code> for any input.
35      */
36     public Object JavaDoc extractSource(Object JavaDoc sourceCandidate, Resource definitionResource) {
37         return null;
38     }
39
40 }
41
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