Class ClassKey
- java.lang.Object
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- com.fasterxml.jackson.databind.type.ClassKey
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- 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 asJsonSerializers.The reason for having a separate key class instead of directly using
Classas key is mostly to allow for redefininghashCodemethod -- for some strange reason,Classdoes not redefineObject.hashCode()and thus uses identity hash, which is pretty slow. This makes key access usingClassunnecessarily slow.Note: since class is not strictly immutable, caller must know what it is doing, if changing field values.
- See Also:
- Serialized Form