initial version of support project with build support.

[utils] / src / org / wamblee / cache / ZeroCache.java

diff --git a/src/org/wamblee/cache/ZeroCache.java b/src/org/wamblee/cache/ZeroCache.java
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+++ b/src/org/wamblee/cache/ZeroCache.java
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+/*
+ * Copyright 2005 the original author or authors.
+ * 
+ * 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.
+ */ 
+
+package org.wamblee.cache;
+
+import java.io.Serializable;
+
+/**
+ * A cache that does not cache. This implementation is useful for disabling caching. 
+ * Because of this implementation, application code does not need to distinguish 
+ * between the situation where it a cache is used and where it isn't. 
+ */
+public class ZeroCache<KeyType extends Serializable, ValueType extends Serializable> 
+   implements Cache<KeyType, ValueType> {
+
+    public ZeroCache() { 
+        // Empty. 
+    }
+    
+    /* (non-Javadoc)
+     * @see org.wamblee.cache.Cache#put(KeyType, ValueType)
+     */
+    public void put(KeyType aKey, ValueType aValue) {
+        // Empty.    
+    }
+    
+    /* (non-Javadoc)
+     * @see org.wamblee.cache.Cache#get(KeyType)
+     */
+    public ValueType get(KeyType aKey) {
+        return null;
+    }
+    
+    /* (non-Javadoc)
+     * @see org.wamblee.cache.Cache#remove(KeyType)
+     */
+    public void remove(KeyType aKey) {
+        // Empty   
+    }
+    
+    /* (non-Javadoc)
+     * @see org.wamblee.cache.Cache#clear()
+     */
+    public void clear() {
+        // Empty   
+    }
+}