1 /*
   2  * reserved comment block
   3  * DO NOT REMOVE OR ALTER!
   4  */
   5 /*
   6  * Licensed to the Apache Software Foundation (ASF) under one or more
   7  * contributor license agreements.  See the NOTICE file distributed with
   8  * this work for additional information regarding copyright ownership.
   9  * The ASF licenses this file to You under the Apache License, Version 2.0
  10  * (the "License"); you may not use this file except in compliance with
  11  * the License.  You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  */
  21 
  22 package com.sun.org.apache.bcel.internal.util;
  23 
  24 import java.util.LinkedList;
  25 import com.sun.org.apache.bcel.internal.classfile.JavaClass;
  26 
  27 /**
  28  * Utility class implementing a (typesafe) queue of JavaClass
  29  * objects.
  30  *
  31  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  32  * @see ClassVector
  33 */
  34 public class ClassQueue implements java.io.Serializable {
  35   protected LinkedList vec  = new LinkedList();
  36 
  37   public void enqueue(JavaClass clazz) { vec.addLast(clazz); }
  38 
  39   public JavaClass dequeue()                {
  40     return (JavaClass)vec.removeFirst();
  41   }
  42 
  43   public boolean empty() { return vec.isEmpty(); }
  44 
  45   public String toString() {
  46     return vec.toString();
  47   }
  48 }