content: /*
   * 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.kafka.streams.state.internals;
  
  import org.apache.kafka.streams.errors.InvalidStateStoreException;
  import org.apache.kafka.streams.processor.StateStore;
  import org.apache.kafka.streams.state.QueryableStoreType;
  import org.apache.kafka.streams.state.QueryableStoreTypes;
  import org.apache.kafka.streams.state.TimestampedKeyValueStore;
  import org.apache.kafka.streams.state.TimestampedWindowStore;
  
  import java.util.Collections;
  import java.util.List;
  import java.util.Map;
  
  public class GlobalStateStoreProvider implements StateStoreProvider {
      private final Map<String, StateStore> globalStateStores;
  
      public GlobalStateStoreProvider(final Map<String, StateStore> globalStateStores) {
          this.globalStateStores = globalStateStores;
      }
  
      @SuppressWarnings("unchecked")
      @Override
      public <T> List<T> stores(final String storeName, final QueryableStoreType<T> queryableStoreType) {
          final StateStore store = globalStateStores.get(storeName);
          if (store == null || !queryableStoreType.accepts(store)) {
              return Collections.emptyList();
          }
          if (!store.isOpen()) {
              throw new InvalidStateStoreException("the state store, " + storeName + ", is not open.");
          }
          if (store instanceof TimestampedKeyValueStore && queryableStoreType instanceof QueryableStoreTypes.KeyValueStoreType) {
              return (List<T>) Collections.singletonList(new ReadOnlyKeyValueStoreFacade<>((TimestampedKeyValueStore<Object, Object>) store));
          } else if (store instanceof TimestampedWindowStore && queryableStoreType instanceof QueryableStoreTypes.WindowStoreType) {
              return (List<T>) Collections.singletonList(new ReadOnlyWindowStoreFacade<>((TimestampedWindowStore<Object, Object>) store));
          }
          return (List<T>) Collections.singletonList(store);
      }
  }
  