001 /* LockInfo.java - Information on a lock. 002 Copyright (C) 2006 Free Software Foundation 003 004 This file is part of GNU Classpath. 005 006 GNU Classpath is free software; you can redistribute it and/or modify 007 it under the terms of the GNU General Public License as published by 008 the Free Software Foundation; either version 2, or (at your option) 009 any later version. 010 011 GNU Classpath is distributed in the hope that it will be useful, but 012 WITHOUT ANY WARRANTY; without even the implied warranty of 013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 General Public License for more details. 015 016 You should have received a copy of the GNU General Public License 017 along with GNU Classpath; see the file COPYING. If not, write to the 018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 019 02110-1301 USA. 020 021 Linking this library statically or dynamically with other modules is 022 making a combined work based on this library. Thus, the terms and 023 conditions of the GNU General Public License cover the whole 024 combination. 025 026 As a special exception, the copyright holders of this library give you 027 permission to link this library with independent modules to produce an 028 executable, regardless of the license terms of these independent 029 modules, and to copy and distribute the resulting executable under 030 terms of your choice, provided that you also meet, for each linked 031 independent module, the terms and conditions of the license of that 032 module. An independent module is a module which is not derived from 033 or based on this library. If you modify this library, you may extend 034 this exception to your version of the library, but you are not 035 obligated to do so. If you do not wish to do so, delete this 036 exception statement from your version. */ 037 038 package java.lang.management; 039 040 import java.beans.ConstructorProperties; 041 042 /** 043 * Provides information on a lock held by a thread. 044 * A lock can be either a built-in monitor, an 045 * <emph>ownable synchronizer</emph> (i.e. a subclass 046 * of {@link java.util.concurrent.locks.AbstractOwnableSynchronizer}), 047 * or a {@link java.util.concurrent.locks.Condition} 048 * object. 049 * 050 * @author Andrew John Hughes (gnu_andrew@member.fsf.org) 051 * @since 1.6 052 */ 053 public class LockInfo 054 { 055 056 /** 057 * The class name of the lock object. 058 */ 059 private String className; 060 061 /** 062 * The identity hash code of the lock object. 063 */ 064 private int identityHashCode; 065 066 /** 067 * Constructs a new {@link LockInfo} object with the 068 * specified class name and identity hash code. 069 * 070 * @param className the name of the class of the lock object. 071 * @param identityHashCode the identity hash code of the 072 * lock object. 073 */ 074 @ConstructorProperties({"className","identityHashCode"}) 075 public LockInfo(String className, int identityHashCode) 076 { 077 this.className = className; 078 this.identityHashCode = identityHashCode; 079 } 080 081 /** 082 * Returns the class name of the lock object. 083 * 084 * @return the class name of the lock object. 085 */ 086 public String getClassName() 087 { 088 return className; 089 } 090 091 /** 092 * Returns the identity hash code of the lock object. 093 * 094 * @return the identity hash code of the lock object. 095 */ 096 public int getIdentityHashCode() 097 { 098 return identityHashCode; 099 } 100 101 /** 102 * Returns a textual representation of the lock, 103 * constructed by concatenating the class name, 104 * <code>'@'</code> and the identity hash code 105 * in unsigned hexadecimal form. 106 * 107 * @return a textual representation of the lock. 108 */ 109 public String toString() 110 { 111 return className + '@' + Integer.toHexString(identityHashCode); 112 } 113 114 }