Source for java.lang.management.LockInfo

   1: /* LockInfo.java - Information on a lock.
   2:    Copyright (C) 2006 Free Software Foundation
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: package java.lang.management;
  39: 
  40: import java.beans.ConstructorProperties;
  41: 
  42: /**
  43:  * Provides information on a lock held by a thread.
  44:  * A lock can be either a built-in monitor, an
  45:  * <emph>ownable synchronizer</emph> (i.e. a subclass
  46:  * of {@link java.util.concurrent.locks.AbstractOwnableSynchronizer}),
  47:  * or a {@link java.util.concurrent.locks.Condition}
  48:  * object.
  49:  *
  50:  * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
  51:  * @since 1.6
  52:  */
  53: public class LockInfo
  54: {
  55: 
  56:   /**
  57:    * The class name of the lock object.
  58:    */
  59:   private String className;
  60: 
  61:   /**
  62:    * The identity hash code of the lock object.
  63:    */
  64:   private int identityHashCode;
  65: 
  66:   /**
  67:    * Constructs a new {@link LockInfo} object with the
  68:    * specified class name and identity hash code.
  69:    *
  70:    * @param className the name of the class of the lock object.
  71:    * @param identityHashCode the identity hash code of the
  72:    *                         lock object.
  73:    */
  74:   @ConstructorProperties({"className","identityHashCode"})
  75:     public LockInfo(String className, int identityHashCode)
  76:   {
  77:     this.className = className;
  78:     this.identityHashCode = identityHashCode;
  79:   }
  80: 
  81:   /**
  82:    * Returns the class name of the lock object.
  83:    *
  84:    * @return the class name of the lock object.
  85:    */
  86:   public String getClassName()
  87:   {
  88:     return className;
  89:   }
  90: 
  91:   /**
  92:    * Returns the identity hash code of the lock object.
  93:    *
  94:    * @return the identity hash code of the lock object.
  95:    */
  96:   public int getIdentityHashCode()
  97:   {
  98:     return identityHashCode;
  99:   }
 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: }