| /* |
| * 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.flink.api.common.state; |
| |
| import org.apache.flink.annotation.PublicEvolving; |
| |
| /** |
| * Extension of {@link AppendingState} that allows merging of state. That is, two instances |
| * of {@link MergingState} can be combined into a single instance that contains all the |
| * information of the two merged states. |
| * |
| * @param <IN> Type of the value that can be added to the state. |
| * @param <OUT> Type of the value that can be retrieved from the state. |
| */ |
| @PublicEvolving |
| public interface MergingState<IN, OUT> extends AppendingState<IN, OUT> { } |
