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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.cluster;
import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.common.io.stream.StreamInput;
import java.io.IOException;
/**
* Cluster state part, changes in which can be serialized
*/
public interface Diffable<T> extends Writeable<T> {
/**
* Returns serializable object representing differences between this and previousState
*/
Diff<T> diff(T previousState);
/**
* Reads the {@link org.elasticsearch.cluster.Diff} from StreamInput
*/
Diff<T> readDiffFrom(StreamInput in) throws IOException;
}
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