01: /*
02: * Copyright 2004-2006 the original author or authors.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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.compass.core.lucene.engine.store;
18:
19: import java.io.IOException;
20:
21: import org.apache.lucene.store.Directory;
22: import org.apache.lucene.store.RAMDirectory;
23: import org.compass.core.engine.SearchEngineException;
24:
25: /**
26: * A directory store implemented using memory. Uses Lucene {@link org.apache.lucene.store.RAMDirectory}.
27: *
28: * @author kimchy
29: */
30: public class RAMDirectoryStore extends AbstractDirectoryStore {
31:
32: public static final String PROTOCOL = "ram://";
33:
34: public Directory open(String subContext, String subIndex)
35: throws SearchEngineException {
36: return new RAMDirectory();
37: }
38:
39: public CopyFromHolder beforeCopyFrom(String subContext,
40: String subIndex, Directory dir)
41: throws SearchEngineException {
42: try {
43: String[] files = dir.list();
44: for (String file : files) {
45: dir.deleteFile(file);
46: }
47: } catch (IOException e) {
48: throw new SearchEngineException(
49: "Faield to delete ram directory before copy", e);
50: }
51: return new CopyFromHolder();
52: }
53: }
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