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src/java.desktop/share/classes/sun/awt/SoftCache.java

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   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.misc;
  27 
  28 import java.lang.ref.SoftReference;
  29 import java.lang.ref.ReferenceQueue;
  30 
  31 import java.util.Iterator;
  32 import java.util.Map;
  33 import java.util.AbstractMap;
  34 import java.util.HashMap;
  35 import java.util.Set;
  36 import java.util.AbstractSet;
  37 import java.util.NoSuchElementException;
  38 
  39 
  40 /**
  41  * A memory-sensitive implementation of the <code>Map</code> interface.
  42  *
  43  * <p> A <code>SoftCache</code> object uses {@link java.lang.ref.SoftReference
  44  * soft references} to implement a memory-sensitive hash map.  If the garbage
  45  * collector determines at a certain point in time that a value object in a
  46  * <code>SoftCache</code> entry is no longer strongly reachable, then it may




   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.awt;
  27 
  28 import java.lang.ref.SoftReference;
  29 import java.lang.ref.ReferenceQueue;
  30 
  31 import java.util.Iterator;
  32 import java.util.Map;
  33 import java.util.AbstractMap;
  34 import java.util.HashMap;
  35 import java.util.Set;
  36 import java.util.AbstractSet;
  37 import java.util.NoSuchElementException;
  38 
  39 
  40 /**
  41  * A memory-sensitive implementation of the <code>Map</code> interface.
  42  *
  43  * <p> A <code>SoftCache</code> object uses {@link java.lang.ref.SoftReference
  44  * soft references} to implement a memory-sensitive hash map.  If the garbage
  45  * collector determines at a certain point in time that a value object in a
  46  * <code>SoftCache</code> entry is no longer strongly reachable, then it may


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