net.sf.ehcache.pool.sizeof
Class UnsafeSizeOf

java.lang.Object
  net.sf.ehcache.pool.sizeof.SizeOf
      net.sf.ehcache.pool.sizeof.UnsafeSizeOf

public class UnsafeSizeOf
extends SizeOf

Unsafe.theUnsafe based sizeOf measurement All constructors will throw UnsupportedOperationException if theUnsafe isn't accessible on this platform

Author:

Chris Dennis

Constructor Summary

UnsafeSizeOf()
Builds a new SizeOf that will not filter fields and will cache reflected fields

UnsafeSizeOf(SizeOfFilter filter)
Builds a new SizeOf that will filter fields according to the provided filter and will cache reflected fields

UnsafeSizeOf(SizeOfFilter filter, boolean caching)
Builds a new SizeOf that will filter fields according to the provided filter

Method Summary

long	sizeOf(Object obj) Calculates the size in memory (heap) of the instance passed in, not navigating the down graph

Methods inherited from class net.sf.ehcache.pool.sizeof.SizeOf

deepSizeOf

Methods inherited from class java.lang.Object

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

Constructor Detail

UnsafeSizeOf

public UnsafeSizeOf()
             throws UnsupportedOperationException

Builds a new SizeOf that will not filter fields and will cache reflected fields

Throws:

UnsupportedOperationException - If Unsafe isn't accessible

See Also:

UnsafeSizeOf(net.sf.ehcache.pool.sizeof.filter.SizeOfFilter, boolean)

UnsafeSizeOf

public UnsafeSizeOf(SizeOfFilter filter)
             throws UnsupportedOperationException

Builds a new SizeOf that will filter fields according to the provided filter and will cache reflected fields

Parameters:

filter - The filter to apply

Throws:

UnsupportedOperationException - If Unsafe isn't accessible

See Also:

UnsafeSizeOf(net.sf.ehcache.pool.sizeof.filter.SizeOfFilter, boolean), SizeOfFilter

UnsafeSizeOf

public UnsafeSizeOf(SizeOfFilter filter,
                    boolean caching)
             throws UnsupportedOperationException

Builds a new SizeOf that will filter fields according to the provided filter

Parameters:

filter - The filter to apply

caching - whether to cache reflected fields

Throws:

UnsupportedOperationException - If Unsafe isn't accessible

See Also:

SizeOfFilter

Method Detail

sizeOf

public long sizeOf(Object obj)

Calculates the size in memory (heap) of the instance passed in, not navigating the down graph

Specified by:

sizeOf in class SizeOf

Parameters:

obj - the object to measure the size of

Returns:

the object size in memory in bytes