Package com.fasterxml.jackson.databind.type

Class ClassKey

java.lang.Object

com.fasterxml.jackson.databind.type.ClassKey

All Implemented Interfaces:

Serializable, Comparable<ClassKey>

public final class ClassKey
extends Object
implements Comparable<ClassKey>, Serializable

Key class, used as an efficient and accurate key for locating per-class values, such as JsonSerializers.

The reason for having a separate key class instead of directly using Class as key is mostly to allow for redefining hashCode method -- for some strange reason, Class does not redefine Object.hashCode() and thus uses identity hash, which is pretty slow. This makes key access using Class unnecessarily slow.

Note: since class is not strictly immutable, caller must know what it is doing, if changing field values.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ClassKey()
ClassKey(Class<?> clz)

Method Summary

Modifier and Type	Method	Description
int	compareTo(ClassKey other)
boolean	equals(Object o)
int	hashCode()
void	reset(Class<?> clz)
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

ClassKey

public ClassKey()

ClassKey

public ClassKey(Class<?> clz)

Method Details

reset

public void reset(Class<?> clz)

compareTo

public int compareTo(ClassKey other)

Specified by:

compareTo in interface Comparable<ClassKey>

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object