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 */ 032public class VerifierFactoryListModel implements VerifierFactoryObserver, javax.swing.ListModel<String> { 033 034 private final List<ListDataListener> listeners = new ArrayList<>(); 035 private final Set<String> cache = new TreeSet<>(); 036 037 public VerifierFactoryListModel() { 038 VerifierFactory.attach(this); 039 update(null); // fill cache. 040 } 041 042 @Override 043 public synchronized void update(final String s) { 044 final Verifier[] verifiers = VerifierFactory.getVerifiers(); 045 final int num_of_verifiers = verifiers.length; 046 cache.clear(); 047 for (final Verifier verifier : verifiers) { 048 cache.add(verifier.getClassName()); 049 } 050 for (final ListDataListener listener : listeners) { 051 final ListDataEvent e = new ListDataEvent(this, ListDataEvent.CONTENTS_CHANGED, 0, num_of_verifiers - 1); 052 listener.contentsChanged(e); 053 } 054 } 055 056 @Override 057 public synchronized void addListDataListener(final ListDataListener l) { 058 listeners.add(l); 059 } 060 061 @Override 062 public synchronized void removeListDataListener(final javax.swing.event.ListDataListener l) { 063 listeners.remove(l); 064 } 065 066 @Override 067 public synchronized int getSize() { 068 return cache.size(); 069 } 070 071 @Override 072 public synchronized String getElementAt(final int index) { 073 return cache.toArray(new String[cache.size()])[index]; 074 } 075 076}