1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 */ 4 /* 5 * Licensed to the Apache Software Foundation (ASF) under one or more 6 * contributor license agreements. See the NOTICE file distributed with 7 * this work for additional information regarding copyright ownership. 8 * The ASF licenses this file to You under the Apache License, Version 2.0 9 * (the "License"); you may not use this file except in compliance with 10 * the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 package com.sun.org.apache.bcel.internal.util; 21 22 import java.util.LinkedList; 23 24 import com.sun.org.apache.bcel.internal.classfile.JavaClass; 25 26 /** 27 * Utility class implementing a (typesafe) queue of JavaClass objects. 28 * 29 * @version $Id: ClassQueue.java 1747278 2016-06-07 17:28:43Z britter $ 30 */ 31 public class ClassQueue { 32 33 private final LinkedList<JavaClass> vec = new LinkedList<>(); 34 35 public void enqueue(final JavaClass clazz) { 36 vec.addLast(clazz); 37 } 38 39 public JavaClass dequeue() { 40 return vec.removeFirst(); 41 } 42 43 public boolean empty() { 44 return vec.isEmpty(); 45 } 46 47 @Override 48 public String toString() { 49 return vec.toString(); 50 } 51 }