From 5664fd4644c78f4571a1a72e6b9f0511fb10720a Mon Sep 17 00:00:00 2001
From: abranson <andrew.branson@cern.ch>
Date: Tue, 2 Aug 2011 22:10:28 +0200
Subject: Finished move to generics. Enforced 1.6 compliance for now. No errors
 or warnings :)

---
 source/com/c2kernel/utils/SoftCache.java | 34 +++++++++++++++++---------------
 1 file changed, 18 insertions(+), 16 deletions(-)

(limited to 'source/com/c2kernel/utils/SoftCache.java')

diff --git a/source/com/c2kernel/utils/SoftCache.java b/source/com/c2kernel/utils/SoftCache.java
index f13c87d..6680f30 100644
--- a/source/com/c2kernel/utils/SoftCache.java
+++ b/source/com/c2kernel/utils/SoftCache.java
@@ -10,12 +10,12 @@ import java.util.*;
  * 
  * $Revision: 1.5 $ $Date: 2004/10/29 13:29:09 $
  ******************************************************************************/
-public class SoftCache extends AbstractMap {
+public class SoftCache<K, V> extends AbstractMap<K, V> {
 
-    private final Map hash = new HashMap();
+    private final Map<K, SoftValue<V>> hash = new HashMap<K, SoftValue<V>>();
     private final int minSize;
-    private final LinkedList hardCache = new LinkedList();
-    private final ReferenceQueue queue = new ReferenceQueue();
+    private final LinkedList<V> hardCache = new LinkedList<V>();
+    private final ReferenceQueue<V> queue = new ReferenceQueue<V>();
 
     public SoftCache() {
         this(0);
@@ -25,9 +25,10 @@ public class SoftCache extends AbstractMap {
         this.minSize = minSize;
     }
 
-    public Object get(Object key) {
-        Object result = null;
-        SoftReference soft_ref = (SoftReference) hash.get(key);
+    @Override
+    public V get(Object key) {
+        V result = null;
+        SoftValue<V> soft_ref = hash.get(key);
         if (soft_ref != null) {
             result = soft_ref.get();
             if (result == null)
@@ -42,19 +43,20 @@ public class SoftCache extends AbstractMap {
         return result;
     }
 
-    public Object put(Object key, Object value) {
+    public V put(K key, V value) {
         processQueue();
         if (minSize > 0) {
             hardCache.addFirst(value);
             if (hardCache.size() > minSize)
                 hardCache.removeLast();
         }
-        return hash.put(key, new SoftValue(value, key, queue));
+        hash.put(key, new SoftValue<V>(key, value, queue));
+        return value;
     }
 
-    public Object remove(Object key) {
+    public V remove(Object key) {
         processQueue();
-        return hash.remove(key);
+        return hash.remove(key).get();
     }
 
     public void clear() {
@@ -68,21 +70,21 @@ public class SoftCache extends AbstractMap {
         return hash.size();
     }
     
-    public Set keySet() {
+    public Set<K> keySet() {
         processQueue();
         return hash.keySet();
     }
 
-    public Set entrySet() {
+    public Set<Map.Entry<K, V>> entrySet() {
         // Would have to create another Map to do this - too expensive
         // Throwing runtime expensive is dangerous, but better than nulls
         throw new UnsupportedOperationException();
     }    
     
-    private static class SoftValue extends SoftReference {
+    private static class SoftValue<V> extends SoftReference<V> {
         private final Object key;
-        private SoftValue(Object k, Object key, ReferenceQueue q) {
-            super(k, q);
+        private SoftValue(Object key, V value, ReferenceQueue<V> q) {
+            super(value, q);
             this.key = key;
         }
     }
-- 
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