001/* LockInfo.java - Information on a lock. 002 Copyright (C) 2006 Free Software Foundation 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038package java.lang.management; 039 040import 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 */ 053public 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}