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 * @version $Id: ClassQueue.java 1806200 2017-08-25 16:33:06Z ggregory $ 029 */ 030public class ClassQueue { 031 032 /** 033 * @deprecated (since 6.0) will be made private; do not access 034 */ 035 @Deprecated 036 protected LinkedList<JavaClass> vec = new LinkedList<>(); // TODO not used externally 037 038 039 public void enqueue( final JavaClass clazz ) { 040 vec.addLast(clazz); 041 } 042 043 044 public JavaClass dequeue() { 045 return vec.removeFirst(); 046 } 047 048 049 public boolean empty() { 050 return vec.isEmpty(); 051 } 052 053 054 @Override 055 public String toString() { 056 return vec.toString(); 057 } 058}