/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.mahout.ep;
import org.apache.hadoop.io.Writable;
/**
* Payloads for evolutionary state must be copyable and updatable. The copy should be a deep copy
* unless some aspect of the state is sharable or immutable.
* <p/>
* During mutation, a copy is first made and then after the parameters in the State structure are
* suitably modified, update is called with the scaled versions of the parameters.
*
* @param <T>
* @see State
*/
public interface Payload<T> extends Writable {
Payload<T> copy();
void update(double[] params);
}