org.jboss.netty.util

Class DefaultObjectSizeEstimator

java.lang.Object

org.jboss.netty.util.DefaultObjectSizeEstimator

All Implemented Interfaces:

ObjectSizeEstimator

Direct Known Subclasses:

AbstractTrafficShapingHandler.SimpleObjectSizeEstimator

public class DefaultObjectSizeEstimator
extends java.lang.Object
implements ObjectSizeEstimator

The default ObjectSizeEstimator implementation for general purpose.

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.concurrent.ConcurrentMap<java.lang.Class<?>,java.lang.Integer>	class2size

Constructor Summary

Constructors

Constructor and Description
DefaultObjectSizeEstimator() Creates a new instance.

Method Summary

Modifier and Type	Method and Description
private static int	align(int size)
private int	estimateSize(java.lang.Class<?> clazz, java.util.Set<java.lang.Class<?>> visitedClasses)
int	estimateSize(java.lang.Object o) Returns the estimated size of the specified object in bytes.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

class2size

private final java.util.concurrent.ConcurrentMap<java.lang.Class<?>,java.lang.Integer> class2size

Constructor Detail

DefaultObjectSizeEstimator

public DefaultObjectSizeEstimator()

Creates a new instance.

Method Detail

estimateSize

public int estimateSize(java.lang.Object o)

Description copied from interface: ObjectSizeEstimator

Returns the estimated size of the specified object in bytes.

Specified by:

estimateSize in interface ObjectSizeEstimator

Returns:

a positive integer which represents the size of the specified object in bytes

estimateSize

private int estimateSize(java.lang.Class<?> clazz,
                         java.util.Set<java.lang.Class<?>> visitedClasses)

align

private static int align(int size)