1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 */
18 package org.apache.bcel.util;
19
20 import java.util.LinkedList;
21 import org.apache.bcel.classfile.JavaClass;
22
23 /**
24 * Utility class implementing a (typesafe) queue of JavaClass
25 * objects.
26 *
27 * @version $Id: ClassQueue.java 1152072 2011-07-29 01:54:05Z dbrosius $
28 * @author <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A>
29 */
30 public class ClassQueue implements java.io.Serializable {
31
32 private static final long serialVersionUID = 685144104322420292L;
33 protected LinkedList<JavaClass> vec = new LinkedList<JavaClass>();
34
35
36 public void enqueue( JavaClass clazz ) {
37 vec.addLast(clazz);
38 }
39
40
41 public JavaClass dequeue() {
42 return vec.removeFirst();
43 }
44
45
46 public boolean empty() {
47 return vec.isEmpty();
48 }
49
50
51 @Override
52 public String toString() {
53 return vec.toString();
54 }
55 }