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.util; 019 020import java.util.Collection; 021import java.util.HashMap; 022import java.util.Map; 023 024import org.apache.bcel.classfile.JavaClass; 025 026/** 027 * Utility class implementing a (typesafe) set of JavaClass objects. 028 * Since JavaClass has no equals() method, the name of the class is 029 * used for comparison. 030 * 031 * @see ClassStack 032 */ 033public class ClassSet { 034 035 private final Map<String, JavaClass> map = new HashMap<>(); 036 037 038 public boolean add( final JavaClass clazz ) { 039 boolean result = false; 040 if (!map.containsKey(clazz.getClassName())) { 041 result = true; 042 map.put(clazz.getClassName(), clazz); 043 } 044 return result; 045 } 046 047 048 public void remove( final JavaClass clazz ) { 049 map.remove(clazz.getClassName()); 050 } 051 052 053 public boolean empty() { 054 return map.isEmpty(); 055 } 056 057 058 public JavaClass[] toArray() { 059 final Collection<JavaClass> values = map.values(); 060 final JavaClass[] classes = new JavaClass[values.size()]; 061 values.toArray(classes); 062 return classes; 063 } 064 065 066 public String[] getClassNames() { 067 return map.keySet().toArray(new String[map.size()]); 068 } 069}