001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 * 017 */ 018package org.apache.bcel.verifier; 019 020import java.util.ArrayList; 021import java.util.List; 022import java.util.Set; 023import java.util.TreeSet; 024 025import javax.swing.event.ListDataEvent; 026import javax.swing.event.ListDataListener; 027 028/** 029 * This class implements an adapter; it implements both a Swing ListModel and a VerifierFactoryObserver. 030 * 031 * @version $Id: VerifierFactoryListModel.java 1749611 2016-06-21 21:53:40Z ggregory $ 032 */ 033public class VerifierFactoryListModel implements VerifierFactoryObserver, javax.swing.ListModel<String> { 034 035 private final List<ListDataListener> listeners = new ArrayList<>(); 036 private final Set<String> cache = new TreeSet<>(); 037 038 public VerifierFactoryListModel() { 039 VerifierFactory.attach(this); 040 update(null); // fill cache. 041 } 042 043 @Override 044 public synchronized void update(final String s) { 045 final Verifier[] verifiers = VerifierFactory.getVerifiers(); 046 final int num_of_verifiers = verifiers.length; 047 cache.clear(); 048 for (final Verifier verifier : verifiers) { 049 cache.add(verifier.getClassName()); 050 } 051 for (final ListDataListener listener : listeners) { 052 final ListDataEvent e = new ListDataEvent(this, ListDataEvent.CONTENTS_CHANGED, 0, num_of_verifiers - 1); 053 listener.contentsChanged(e); 054 } 055 } 056 057 @Override 058 public synchronized void addListDataListener(final ListDataListener l) { 059 listeners.add(l); 060 } 061 062 @Override 063 public synchronized void removeListDataListener(final javax.swing.event.ListDataListener l) { 064 listeners.remove(l); 065 } 066 067 @Override 068 public synchronized int getSize() { 069 return cache.size(); 070 } 071 072 @Override 073 public synchronized String getElementAt(final int index) { 074 return cache.toArray(new String[cache.size()])[index]; 075 } 076 077}