com.hazelcast.projection

Class Projection<I,O>

java.lang.Object

com.hazelcast.projection.Projection<I,O>

Type Parameters:

I - input type

O - output type

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

IdentityProjection, MultiAttributeProjection, SingleAttributeProjection

public abstract class Projection<I,O>
extends Object
implements Serializable

Enables transforming object into other objects. Exemplary usage scenario is the project() method of the IMap

Only 1:1 transformations allowed. Use an Aggregator to perform N:1 or N:M aggregations.

{@code
      IMap employees = instance.getMap("employees");

      Collection names = employees.project(new Projection,String>(){

Since:

3.8

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Projection()

Method Summary

Modifier and Type	Method and Description
abstract O	transform(I input) Transforms the input object into the output object.

Methods inherited from class java.lang.Object

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

Constructor Detail

Projection

public Projection()

Method Detail

transform

public abstract O transform(I input)

Transforms the input object into the output object.

Parameters:

input - object.

Returns:

the output object.