@@ -0,0 +1,1383 @@
+/*%0A * Licensed to the Apache Software Foundation (ASF) under one%0A * or more contributor license agreements.  See the NOTICE file%0A * distributed with this work for additional information%0A * regarding copyright ownership.  The ASF licenses this file%0A * to you under the Apache License, Version 2.0 (the%0A * %22License%22); you may not use this file except in compliance%0A * with the License.  You may obtain a copy of the License at%0A *%0A *     http://www.apache.org/licenses/LICENSE-2.0%0A *%0A * Unless required by applicable law or agreed to in writing, software%0A * distributed under the License is distributed on an %22AS IS%22 BASIS,%0A * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.%0A * See the License for the specific language governing permissions and%0A * limitations under the License.%0A */%0Apackage org.apache.beam.sdk.util.state;%0A%0Aimport org.apache.beam.sdk.annotations.Experimental;%0Aimport org.apache.beam.sdk.annotations.Experimental.Kind;%0A%0Aimport java.io.Serializable;%0A%0A/**%0A * A factory for providing %7B@link StateInternals%7D for a particular key.%0A *%0A * %3Cp%3EBecause it will generally be embedded in a %7B@link DoFn%7D, albeit at execution time,%0A * it is marked %7B@link Serializable%7D.%0A */%0A@Experimental(Kind.STATE)%0Apublic interface StateInternalsFactory%3CK%3E %7B%0A%0A  /** Returns %7B@link StateInternals%7D for the provided key. */%0A  StateInternals%3CK%3E stateInternalsForKey(K key);%0A%7D%0A

Introduce StateInternalsFactory