Merge branch 'master' of feistymeow.org:feisty_meow

[feisty_meow.git] / kona / src / org / gffs / cache / RoleBasedCacheNode.java

diff --git a/kona/src/org/gffs/cache/RoleBasedCacheNode.java b/kona/src/org/gffs/cache/RoleBasedCacheNode.java
new file mode 100644 (file)
index 0000000..5168d14
--- /dev/null
+++ b/kona/src/org/gffs/cache/RoleBasedCacheNode.java
@@ -0,0 +1,100 @@
+package org.gffs.cache;
+
+/*
+ * Copyright 2006 University of Virginia
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may
+ * obtain a copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions
+ * and limitations under the License.
+ */
+
+import java.util.Date;
+
+class RoleBasedCacheNode<KeyType, DataType>
+{
+       static public final int ROLE_LRU = 0;
+       static public final int ROLE_TIMEOUT = 1;
+       static private final int _NUM_ROLES = 2;
+
+       private Object[] _next;
+       private Object[] _previous;
+
+       private KeyType _key;
+       private DataType _data;
+
+       private Date _invalidationDate;
+
+       public RoleBasedCacheNode(KeyType key, DataType data, Date invalidationDate)
+       {
+               _next = new Object[_NUM_ROLES];
+               _previous = new Object[_NUM_ROLES];
+
+               for (int lcv = 0; lcv < _NUM_ROLES; lcv++) {
+                       _next[lcv] = null;
+                       _previous[lcv] = null;
+               }
+
+               _key = key;
+               _data = data;
+               _invalidationDate = invalidationDate;
+       }
+
+       public KeyType getKey()
+       {
+               return _key;
+       }
+
+       public DataType getData()
+       {
+               return _data;
+       }
+
+       public Date getInvalidationDate()
+       {
+               return _invalidationDate;
+       }
+
+       public void setInvalidationDate(long millisecondsFromNow)
+       {
+               _invalidationDate = new Date(System.currentTimeMillis() + millisecondsFromNow);
+       }
+
+       @SuppressWarnings("unchecked")
+       public RoleBasedCacheNode<KeyType, DataType> getPrevious(int role)
+       {
+               return RoleBasedCacheNode.class.cast(_previous[role]);
+       }
+
+       @SuppressWarnings("unchecked")
+       public RoleBasedCacheNode<KeyType, DataType> getNext(int role)
+       {
+               return RoleBasedCacheNode.class.cast(_next[role]);
+       }
+
+       public void setPrevious(int role, RoleBasedCacheNode<KeyType, DataType> previous)
+       {
+               _previous[role] = previous;
+       }
+
+       public void setNext(int role, RoleBasedCacheNode<KeyType, DataType> next)
+       {
+               _next[role] = next;
+       }
+
+       public void clearLinks(int role)
+       {
+               _previous[role] = null;
+               _next[role] = null;
+       }
+
+       public void clearLinks()
+       {
+               for (int lcv = 0; lcv < _NUM_ROLES; lcv++)
+                       clearLinks(lcv);
+       }
+}
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