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Java > Open Source Codes > org > apache > ws > jaxme > logging > LoggerFactoryImpl


1 /*
2  * Copyright 2003, 2004 The Apache Software Foundation
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.apache.ws.jaxme.logging;
18
19 import java.util.HashMap JavaDoc;
20 import java.util.Map JavaDoc;
21
22
23 /** <p>Default implementation of a {@link LoggerFactory}. The default
24  * implementation holds an internal Map of Loggers.</p>
25  *
26  * @author <a HREF="mailto:joe@ispsoft.de">Jochen Wiedmann</a>
27  */
28 public abstract class LoggerFactoryImpl implements LoggerFactory {
29    private Map JavaDoc loggers = new HashMap JavaDoc();
30
31    /** <p>Creates a new {@link Logger} with the given name. The logger
32     * will be added to an internal {@link Map} and the next call to
33     * {@link #getLogger(String)} with the same name will return
34     * this {@link Logger}.</p>
35     */
36    public abstract Logger newLogger(String JavaDoc pName);
37
38    /** <p>Returns a {@link Logger} with the name <code>pName</code>.
39     * If the internal {@link Map} of loggers already contains a {@link Logger}
40     * with name <code>pName</code>, returns that one. Otherwise creates
41     * a new instance by calling {@link #newLogger(String)}, stores
42     * the instance in the internal {@link Map} and returns it.</p>
43     */
44     public Logger getLogger(String JavaDoc pName) {
45       Logger result = (Logger) loggers.get(pName);
46       if (result == null) {
47          result = newLogger(pName);
48          loggers.put(pName, result);
49       }
50       return result;
51     }
52 }
53
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