org.infinispan.query

Interface Transformer

public interface Transformer

Convert objects (cache keys only) from their original Java types to a String representation (which is suitable to be used in a Lucene index) and vice versa. Transformers are needed only for custom types. Primitive types (boxed), java.lang.String, java.util.UUID and byte arrays are internally handled without the need of a user-supplied Transformer.

Implementations must be thread-safe! It is recommended they are also stateless.

Since:

4.0

Author:

Manik Surtani

Method Summary

Modifier and Type	Method and Description
Object	fromString(String str) Transforms a String into an Object.
String	toString(Object obj) Transforms an Object into a String.

Method Detail

fromString

Object fromString(String str)

Transforms a String into an Object.

Parameters:

str - cannot be null

Returns:

the Object that is encoded in the given String

toString

String toString(Object obj)

Transforms an Object into a String.

Parameters:

obj - cannot be null

Returns:

the String representation of the object