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 */
017package org.apache.bcel.util;
018
019import java.util.LinkedList;
020
021import org.apache.bcel.classfile.JavaClass;
022
023/**
024 * Utility class implementing a (typesafe) queue of JavaClass objects.
025 */
026public class ClassQueue {
027
028    /**
029     * @deprecated (since 6.0) will be made private; do not access
030     */
031    @Deprecated
032    protected LinkedList<JavaClass> vec = new LinkedList<>(); // TODO not used externally
033
034    public JavaClass dequeue() {
035        return vec.removeFirst();
036    }
037
038    public boolean empty() {
039        return vec.isEmpty();
040    }
041
042    public void enqueue(final JavaClass clazz) {
043        vec.addLast(clazz);
044    }
045
046    @Override
047    public String toString() {
048        return vec.toString();
049    }
050}