pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / java / org / apache / lucene / util / AverageGuessMemoryModel.java

diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/util/AverageGuessMemoryModel.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/util/AverageGuessMemoryModel.java
new file mode 100644 (file)
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--- /dev/null
+++ b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/util/AverageGuessMemoryModel.java
@@ -0,0 +1,78 @@
+package org.apache.lucene.util;
+
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.IdentityHashMap;
+import java.util.Map;
+
+/**
+ * An average, best guess, MemoryModel that should work okay on most systems.
+ * 
+ */
+public class AverageGuessMemoryModel extends MemoryModel {
+  // best guess primitive sizes
+  private final Map<Class<?>,Integer> sizes = new IdentityHashMap<Class<?>,Integer>() {
+    {
+      put(boolean.class, Integer.valueOf(1));
+      put(byte.class, Integer.valueOf(1));
+      put(char.class, Integer.valueOf(2));
+      put(short.class, Integer.valueOf(2));
+      put(int.class, Integer.valueOf(4));
+      put(float.class, Integer.valueOf(4));
+      put(double.class, Integer.valueOf(8));
+      put(long.class, Integer.valueOf(8));
+    }
+  };
+
+  /*
+   * (non-Javadoc)
+   * 
+   * @see org.apache.lucene.util.MemoryModel#getArraySize()
+   */
+  @Override
+  public int getArraySize() {
+    return 16;
+  }
+
+  /*
+   * (non-Javadoc)
+   * 
+   * @see org.apache.lucene.util.MemoryModel#getClassSize()
+   */
+  @Override
+  public int getClassSize() {
+    return 8;
+  }
+
+  /* (non-Javadoc)
+   * @see org.apache.lucene.util.MemoryModel#getPrimitiveSize(java.lang.Class)
+   */
+  @Override
+  public int getPrimitiveSize(Class<?> clazz) {
+    return sizes.get(clazz).intValue();
+  }
+
+  /* (non-Javadoc)
+   * @see org.apache.lucene.util.MemoryModel#getReferenceSize()
+   */
+  @Override
+  public int getReferenceSize() {
+    return 4;
+  }
+
+}