Package com.fasterxml.jackson.databind.util

Class CompactStringObjectMap

java.lang.Object

com.fasterxml.jackson.databind.util.CompactStringObjectMap

All Implemented Interfaces:

java.io.Serializable

public final class CompactStringObjectMap
extends java.lang.Object
implements java.io.Serializable

Specialized lookup class that implements functionality similar to Map, but for special case of key always being String and using more compact (and memory-access friendly) hashing scheme. Assumption is also that keys are typically intern()ed.

Generics are not used to avoid bridge methods and since these maps are not exposed as part of external API.

Since:

2.6

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private java.lang.Object[]	_hashArea
private int	_hashMask
private int	_spillCount
private static CompactStringObjectMap	EMPTY	Shared instance that can be used when there are no contents to Map.
private static long	serialVersionUID

Constructor Summary

Constructors

Modifier	Constructor	Description
private	CompactStringObjectMap(int hashMask, int spillCount, java.lang.Object[] hashArea)

Method Summary

Modifier and Type	Method	Description
private java.lang.Object	_find2(java.lang.String key, int slot, java.lang.Object match)
static <T> CompactStringObjectMap	construct(java.util.Map<java.lang.String,T> all)
java.lang.Object	find(java.lang.String key)
java.lang.Object	findCaseInsensitive(java.lang.String key)
private static int	findSize(int size)
java.util.List<java.lang.String>	keys()

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

EMPTY

private static final CompactStringObjectMap EMPTY

Shared instance that can be used when there are no contents to Map.

_hashMask

private final int _hashMask

_spillCount

private final int _spillCount

_hashArea

private final java.lang.Object[] _hashArea

Constructor Detail

CompactStringObjectMap

private CompactStringObjectMap(int hashMask,
                               int spillCount,
                               java.lang.Object[] hashArea)

Method Detail

construct

public static <T> CompactStringObjectMap construct(java.util.Map<java.lang.String,T> all)

findSize

private static final int findSize(int size)

find

public java.lang.Object find(java.lang.String key)

_find2

private final java.lang.Object _find2(java.lang.String key,
                                      int slot,
                                      java.lang.Object match)

findCaseInsensitive

public java.lang.Object findCaseInsensitive(java.lang.String key)

Since:

2.9

keys

public java.util.List<java.lang.String> keys()