    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
    026 * objects.
    027 *
    028 */
    029public class ClassQueue {
    030
    031    /**
    032     * @deprecated (since 6.0) will be made private; do not access
    033     */
    034    @Deprecated
    035    protected LinkedList<JavaClass> vec = new LinkedList<>(); // TODO not used externally
    036
    037
    038    public void enqueue( final JavaClass clazz ) {
    039        vec.addLast(clazz);
    040    }
    041
    042
    043    public JavaClass dequeue() {
    044        return vec.removeFirst();
    045    }
    046
    047
    048    public boolean empty() {
    049        return vec.isEmpty();
    050    }
    051
    052
    053    @Override
    054    public String toString() {
    055        return vec.toString();
    056    }
    057}