    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one
    003 * or more contributor license agreements.  See the NOTICE file
    004 * distributed with this work for additional information
    005 * regarding copyright ownership.  The ASF licenses this file
    006 * to you under the Apache License, Version 2.0 (the
    007 * "License"); you may not use this file except in compliance
    008 * with the License.  You may obtain a copy of the License at
    009 *
    010 *   https://www.apache.org/licenses/LICENSE-2.0
    011 *
    012 * Unless required by applicable law or agreed to in writing,
    013 * software distributed under the License is distributed on an
    014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    015 * KIND, either express or implied.  See the License for the
    016 * specific language governing permissions and limitations
    017 * under the License.
    018 */
    019package org.apache.bcel.util;
    020
    021import java.util.LinkedList;
    022
    023import org.apache.bcel.classfile.JavaClass;
    024
    025/**
    026 * Utility class implementing a (typesafe) queue of JavaClass objects.
    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}