1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. 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
18 package org.apache.log4j.varia;
19
20 import org.apache.log4j.AppenderSkeleton;
21 import org.apache.log4j.spi.LoggingEvent;
22
23 import javax.swing.DefaultListModel;
24 import javax.swing.ListModel;
25
26
27 /**
28 * A very basic appender that takes the events and stores them in to a
29 * ListModel for late retrieval.
30 *
31 *
32 * @author Paul Smith (psmith@apache.org)
33 *
34 */
35 public final class ListModelAppender extends AppenderSkeleton {
36 /**
37 * Default list model.
38 */
39 private final DefaultListModel model = new DefaultListModel();
40
41 /**
42 * Constructs a ListModelAppender.
43 */
44 public ListModelAppender() {
45 super(true);
46 }
47 /**
48 * Returns a reference to the ListModel that contains all the LoggingEvents
49 * that have been appended to this class.
50 *
51 * @return the list model
52 */
53 public ListModel getModel() {
54 return model;
55 }
56
57 /** {@inheritDoc} */
58 protected void append(final LoggingEvent event) {
59 model.addElement(event);
60 }
61
62 /** {@inheritDoc} */
63 public void close() {
64 clearModel();
65 }
66
67 /**
68 * Removes all the Events from the model.
69 */
70 public void clearModel() {
71 model.clear();
72 }
73
74 /** {@inheritDoc} */
75 public boolean requiresLayout() {
76 return false;
77 }
78
79 }