    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.LinkedList;
    021
    022import org.apache.bcel.classfile.JavaClass;
    023
    024/**
    025 * Utility class implementing a (typesafe) queue of JavaClass objects.
    026 *
    027 */
    028public class ClassQueue {
    029
    030    /**
    031     * @deprecated (since 6.0) will be made private; do not access
    032     */
    033    @Deprecated
    034    protected LinkedList<JavaClass> vec = new LinkedList<>(); // TODO not used externally
    035
    036    public JavaClass dequeue() {
    037        return vec.removeFirst();
    038    }
    039
    040    public boolean empty() {
    041        return vec.isEmpty();
    042    }
    043
    044    public void enqueue(final JavaClass clazz) {
    045        vec.addLast(clazz);
    046    }
    047
    048    @Override
    049    public String toString() {
    050        return vec.toString();
    051    }
    052}