    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}