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| org.apache.jetspeed.util.FIFOQueue |
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| 1 | /* |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
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| 3 | * contributor license agreements. See the NOTICE file distributed with |
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| 4 | * this work for additional information regarding copyright ownership. |
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| 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
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| 6 | * (the "License"); you may not use this file except in compliance with |
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| 7 | * the License. You may obtain a copy of the License at |
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| 8 | * |
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| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 10 | * |
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| 11 | * Unless required by applicable law or agreed to in writing, software |
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| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 14 | * See the License for the specific language governing permissions and |
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| 15 | * limitations under the License. |
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| 16 | */ |
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| 17 | ||
| 18 | package org.apache.jetspeed.util; |
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| 19 | ||
| 20 | /** |
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| 21 | * Simple FIFO implementation of Queue interface extending Vector |
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| 22 | * as storage backend. |
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| 23 | * |
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| 24 | * @author <a href="mailto:raphael@apache.org">Rapha\u00ebl Luta</a> |
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| 25 | * @version $Id: FIFOQueue.java 516448 2007-03-09 16:25:47Z ate $ |
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| 26 | */ |
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| 27 | 0 | public class FIFOQueue extends java.util.Vector implements Queue |
| 28 | { |
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| 29 | /** |
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| 30 | * Adds a new object into the queue |
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| 31 | */ |
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| 32 | public synchronized void push(Object obj) |
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| 33 | { |
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| 34 | 0 | this.add(obj); |
| 35 | 0 | } |
| 36 | ||
| 37 | /** |
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| 38 | * Gets the first object in the queue and remove it from the queue |
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| 39 | */ |
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| 40 | public synchronized Object pop() |
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| 41 | { |
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| 42 | ||
| 43 | 0 | if (this.size() == 0) |
| 44 | { |
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| 45 | 0 | return null; |
| 46 | } |
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| 47 | ||
| 48 | 0 | return this.remove(0); |
| 49 | } |
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| 50 | ||
| 51 | /** |
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| 52 | * Gets the first object in the queue without removing it from the queue |
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| 53 | */ |
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| 54 | public synchronized Object peek() |
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| 55 | { |
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| 56 | ||
| 57 | 0 | if (this.size() == 0) |
| 58 | { |
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| 59 | 0 | return null; |
| 60 | } |
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| 61 | ||
| 62 | 0 | return this.get(0); |
| 63 | } |
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| 64 | } |
| This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |