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.*;
24
25
26 /**
27 * A very basic appender that takes the events and stores them in to a
28 * ListModel for late retrieval.
29 *
30 * @author Paul Smith (psmith@apache.org)
31 */
32 public final class ListModelAppender extends AppenderSkeleton {
33 /**
34 * Default list model.
35 */
36 private final DefaultListModel<LoggingEvent> model = new DefaultListModel<>();
37
38 /**
39 * Constructs a ListModelAppender.
40 */
41 public ListModelAppender() {
42 super(true);
43 }
44
45 /**
46 * Returns a reference to the ListModel that contains all the LoggingEvents
47 * that have been appended to this class.
48 *
49 * @return the list model
50 */
51 public ListModel<LoggingEvent> getModel() {
52 return model;
53 }
54
55 /**
56 * {@inheritDoc}
57 */
58 protected void append(final LoggingEvent event) {
59 model.addElement(event);
60 }
61
62 /**
63 * {@inheritDoc}
64 */
65 public void close() {
66 clearModel();
67 }
68
69 /**
70 * Removes all the Events from the model.
71 */
72 public void clearModel() {
73 model.clear();
74 }
75
76 /**
77 * {@inheritDoc}
78 */
79 public boolean requiresLayout() {
80 return false;
81 }
82
83 }