Package com.complexible.common.base

Class SizeFunctions

java.lang.Object

com.complexible.common.base.SizeFunctions

public final class SizeFunctions
extends Object

Implementation of size computation for commonly used object types. The result will typically be an approximation rather than an exact amount. Speed is more important than accuracy since this utility is primarily used to adjust the number of elements in a cache.

Version:

2.0

Author:

Evren Sirin

Field Summary

Fields

Modifier and Type	Field	Description
static final int	ARRAY_OVERHEAD
static final SizeFunction<Long>	LONG
static final SizeFunction<Number>	NUMBER	WARNING: checks only for Long and Integer instances! Everything that is not a Long will be sized as if it is an Integer.
static final int	OBJECT_OVERHEAD
static final int	REF_OVERHEAD
static final SizeFunction<String>	STRING

Method Summary

Modifier and Type	Method	Description
static <T> SizeFunction<T>	constantSize(int size)

Methods inherited from class java.lang.Object

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

Field Details

OBJECT_OVERHEAD

public static final int OBJECT_OVERHEAD

See Also:

• Constant Field Values

REF_OVERHEAD

public static final int REF_OVERHEAD

See Also:

• Constant Field Values

ARRAY_OVERHEAD

public static final int ARRAY_OVERHEAD

See Also:

• Constant Field Values

STRING

public static final SizeFunction<String> STRING

NUMBER

public static final SizeFunction<Number> NUMBER

WARNING: checks only for Long and Integer instances! Everything that is not a Long will be sized as if it is an Integer.

LONG

public static final SizeFunction<Long> LONG

Method Details

constantSize

public static <T> SizeFunction<T> constantSize(int size)