ReadWriteLockKey.java |
1 /** 2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved. 3 * 4 * 5 * 6 * 7 * The contents of this file are subject to the terms of the Liferay Enterprise 8 * Subscription License ("License"). You may not use this file except in 9 * compliance with the License. You can obtain a copy of the License by 10 * contacting Liferay, Inc. See the License for the specific language governing 11 * permissions and limitations under the License, including but not limited to 12 * distribution rights of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 20 * SOFTWARE. 21 */ 22 23 package com.liferay.portal.kernel.concurrent; 24 25 import com.liferay.portal.kernel.util.Validator; 26 27 /** 28 * <a href="ReadWriteLockKey.java.html"><b><i>View Source</i></b></a> 29 * 30 * Represents a key that is used by ReadWriteLockRegistry. T must also be 31 * immutable and properly implement the equals and hashCode methods. <a 32 * href="ReadWriteLockKey.java.html"><b><i>View Source</i></b></a> 33 * 34 * @author Shuyang Zhou 35 * @see ReadWriteLockRegistry 36 */ 37 public class ReadWriteLockKey<T> { 38 39 public ReadWriteLockKey(T key, boolean writeLock) { 40 _key = key; 41 _writeLock = writeLock; 42 } 43 44 public boolean equals(Object obj) { 45 if (obj == null) { 46 return false; 47 } 48 49 if (!(obj instanceof ReadWriteLockKey<?>)) { 50 return false; 51 } 52 53 ReadWriteLockKey<T> readWriteLockKey = (ReadWriteLockKey<T>)obj; 54 55 if (Validator.equals(_key, readWriteLockKey._key)) { 56 return true; 57 } 58 59 return true; 60 } 61 62 public T getKey() { 63 return _key; 64 } 65 66 public int hashCode() { 67 return _key.hashCode(); 68 } 69 70 public boolean isWriteLock() { 71 return _writeLock; 72 } 73 74 private final T _key; 75 private final boolean _writeLock; 76 77 }