Class UnsafeSizeOf

java.lang.Object

org.ehcache.sizeof.SizeOf

org.ehcache.sizeof.impl.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

Constructors

Constructor	Description
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, boolean bypassFlyweight)	Builds a new SizeOf that will filter fields according to the provided filter

Method Summary

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

Methods inherited from class SizeOf

deepSizeOf, deepSizeOf, newInstance, newInstance

Methods inherited from class Object

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

Constructor Details

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(org.ehcache.sizeof.filters.SizeOfFilter, boolean, 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(org.ehcache.sizeof.filters.SizeOfFilter, boolean, boolean)
• SizeOfFilter

UnsafeSizeOf

public UnsafeSizeOf(SizeOfFilter filter,
 boolean caching,
 boolean bypassFlyweight)
             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

bypassFlyweight - whether "Flyweight Objects" are to be ignored

Throws:

UnsupportedOperationException - If Unsafe isn't accessible

See Also:

• SizeOfFilter

Method Details

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