1 package org.apache.lucene.util;
4 * Licensed to the Apache Software Foundation (ASF) under one or more
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20 import java.util.IdentityHashMap;
24 * An average, best guess, MemoryModel that should work okay on most systems.
27 public class AverageGuessMemoryModel extends MemoryModel {
28 // best guess primitive sizes
29 private final Map<Class<?>,Integer> sizes = new IdentityHashMap<Class<?>,Integer>() {
31 put(boolean.class, Integer.valueOf(1));
32 put(byte.class, Integer.valueOf(1));
33 put(char.class, Integer.valueOf(2));
34 put(short.class, Integer.valueOf(2));
35 put(int.class, Integer.valueOf(4));
36 put(float.class, Integer.valueOf(4));
37 put(double.class, Integer.valueOf(8));
38 put(long.class, Integer.valueOf(8));
45 * @see org.apache.lucene.util.MemoryModel#getArraySize()
48 public int getArraySize() {
55 * @see org.apache.lucene.util.MemoryModel#getClassSize()
58 public int getClassSize() {
63 * @see org.apache.lucene.util.MemoryModel#getPrimitiveSize(java.lang.Class)
66 public int getPrimitiveSize(Class<?> clazz) {
67 return sizes.get(clazz).intValue();
71 * @see org.apache.lucene.util.MemoryModel#getReferenceSize()
74 public int getReferenceSize() {