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 }