TempStorage.java revision 22a4e0ddbfae02299a5a6345683a13166284d50d 
1/****************************************************************
2 * Licensed to the Apache Software Foundation (ASF) under one   *
3 * or more contributor license agreements.  See the NOTICE file *
4 * distributed with this work for additional information        *
5 * regarding copyright ownership.  The ASF licenses this file   *
6 * to you under the Apache License, Version 2.0 (the            *
7 * "License"); you may not use this file except in compliance   *
8 * with the License.  You may obtain a copy of the License at   *
9 *                                                              *
10 *   http://www.apache.org/licenses/LICENSE-2.0                 *
11 *                                                              *
12 * Unless required by applicable law or agreed to in writing,   *
13 * software distributed under the License is distributed on an  *
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
15 * KIND, either express or implied.  See the License for the    *
16 * specific language governing permissions and limitations      *
17 * under the License.                                           *
18 ****************************************************************/
19
20package org.apache.james.mime4j.util;
21
22//BEGIN android-changed: Stubbing out logging
23import com.android.email.apacheloggingstub.Log;
24import com.android.email.apacheloggingstub.LogFactory;
25//END android-changed
26
27/**
28 *
29 * @version $Id: TempStorage.java,v 1.2 2004/10/02 12:41:11 ntherning Exp $
30 */
31public abstract class TempStorage {
32    private static Log log = LogFactory.getLog(TempStorage.class);
33    private static TempStorage inst = null;
34
35    static {
36
37        String clazz = System.getProperty("org.apache.james.mime4j.tempStorage");
38        try {
39
40            if (inst != null) {
41                inst = (TempStorage) Class.forName(clazz).newInstance();
42            }
43
44        } catch (Throwable t) {
45            log.warn("Unable to create or instantiate TempStorage class '"
46                      + clazz + "' using SimpleTempStorage instead", t);
47        }
48
49        if (inst == null) {
50            inst = new SimpleTempStorage();
51        }
52    }
53
54    /**
55     * Gets the root temporary path which should be used to
56     * create new temporary paths or files.
57     *
58     * @return the root temporary path.
59     */
60    public abstract TempPath getRootTempPath();
61
62    public static TempStorage getInstance() {
63        return inst;
64    }
65
66    public static void setInstance(TempStorage inst) {
67        if (inst == null) {
68            throw new NullPointerException("inst");
69        }
70        TempStorage.inst = inst;
71    }
72}
73