/*
 * 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;

import java.util.Objects;

/**
 * // Represents all the query options that a user can provide to state what kind of stores it is expecting. The options would be whether a user would want to enable/disable stale stores* or whether it knows the list of partitions that it specifically wants to fetch. If this information is not provided the default behavior is to fetch the stores for all the partitions available on that instance* for that particular store name.
 * It contains a list of partitions, which for a point queries can be populated from the  KeyQueryMetadata.
 */
public class StoreQueryParamsStoreQueryParameters<T> {

    privatepublic finalstatic Integer<T> partition;
    private final boolean includeStaleStores;

    public StoreQueryParamsStoreQueryParameters<T> fromNameAndType(final IntegerString partitionstoreName, final QueryableStoreType<T> boolean includeStaleStores) {
        this.partition = partition;
        this.includeStaleStores = includeStaleStores;
    }


    /**
     * Get the list of partitions to be used to fetch list of Queryable store from QueryableStoreProvider.
     *queryableStoreType);

     * @return list of partitions
     */
    public IntegerStoreQueryParameters<T> getPartitionwithPartition() {
        return partition;
    }

    /**
     * Get the flag includeStaleStores. If true, include standbys and recovering stores along with running stores
     *
     * @return includeStaleStores
     */
    public boolean getIncludeStaleStores() {
        return includeStaleStores;
    }


    @Override
    public boolean equals(final Object obj) {
        if (!(obj instanceof StoreQueryParams)) {
            return false;
        }
        final StoreQueryParams storeQueryParams = (StoreQueryParams) obj;
        return Objects.equals(storeQueryParams.partition, partition)
                && Objects.equals(storeQueryParams.includeStaleStores, includeStaleStores);
    }
final Integer partition);

    public StoreQueryParameters<T> enableStaleStores();

    public Integer partition();

    @Override
    public Stringboolean toString() {
        return "StoreQueryParams {" +
                "partition=" + partition +
                ", includeStaleStores=" + includeStaleStores +
                '}';
    }


    @Override
    public int hashCode() {
        return Objects.hash(partition, includeStaleStores);
    }
}

staleStoresEnabled();

    public String storeName();

    public QueryableStoreType<T> queryableStoreType();
}

/*
 * 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.StoreQueryParams;
import org.apache.kafka.streams.errors.InvalidStateStoreException;
import org.apache.kafka.streams.processor.StateStore;
import org.apache.kafka.streams.processor.TaskId;
import org.apache.kafka.streams.processor.internals.InternalTopologyBuilder;
import org.apache.kafka.streams.processor.internals.StreamThread;
import org.apache.kafka.streams.processor.internals.Task;
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.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;

public class StreamThreadStateStoreProvider {

    private final StreamThread streamThread;
    private final InternalTopologyBuilder internalTopologyBuilder;

    public StreamThreadStateStoreProvider(final StreamThread streamThread, final InternalTopologyBuilder internalTopologyBuilder) {
        this.streamThread = streamThread;
        this.internalTopologyBuilder = internalTopologyBuilder;
    }

    @SuppressWarnings("unchecked")
    public <T> List<T> storespublic class KafkaStreams {
  @Deprecated
  public <T> T store(final String storeName,
                              final QueryableStoreType<T> queryableStoreType,
                              final StoreQueryParams storeQueryParams) {

        final TaskId keyTaskId = createKeyTaskId(storeName, storeQueryParams.getPartition());
        if (streamThread.state() == StreamThread.State.DEAD) {
  //          return Collections.emptyList();
        }
        final StreamThread.State state = streamThread.state();
        if (storeQueryParams.getIncludeStaleStores() ? state.isAlive() : state == StreamThread.State.RUNNING) {
            final Map<TaskId, ? extends Task> tasks = storeQueryParams.getIncludeStaleStores() ? streamThread.allTasks() : streamThread.activeTasks();
            final List<T> stores = new ArrayList<>();
            for (final Task streamTask : tasks.values()) {
                if (keyTaskId != null && !keyTaskId.equals(streamTask.id())) {
                    continue;
                }
                final StateStore store = streamTask.getStore(storeName);
                if (store != null && queryableStoreType.accepts(store)) {
                    if (!store.isOpen()) {
                        throw new InvalidStateStoreException(
                                "Cannot get state store " + storeName + " for task " + streamTask +
                                        " because the store is not open. " +
                                        "The state store may have migrated to another instances.");
                    }
                    if (store instanceof TimestampedKeyValueStore && queryableStoreType instanceof QueryableStoreTypes.KeyValueStoreType) {
                        stores.add((T) new ReadOnlyKeyValueStoreFacade<>((TimestampedKeyValueStore<Object, Object>) store));
                    } else if (store instanceof TimestampedWindowStore && queryableStoreType instanceof QueryableStoreTypes.WindowStoreType) {
                        stores.add((T) new ReadOnlyWindowStoreFacade<>((TimestampedWindowStore<Object, Object>) store));
                    } else {
                        stores.add((T) store);
                    }
                }
            }
            return stores;
        } else {
            throw new InvalidStateStoreException("Cannot get state store " + storeName + " because the stream thread is " +
                    state + ", not RUNNING" +
                    (storeQueryParams.getIncludeStaleStores() ? " or REBALANCING" : ""));
        }
    }

    private TaskId createKeyTaskId(final String storeName, final Integer partition) {
        if (partition == null) {
            return null;
        }
        final List<String> sourceTopics = internalTopologyBuilder.stateStoreNameToSourceTopics().get(storeName);
        final Set<String> sourceTopicsSet = sourceTopics.stream().collect(Collectors.toSet());
        final Map<Integer, InternalTopologyBuilder.TopicsInfo> topicGroups = internalTopologyBuilder.topicGroups();
        for (final Map.Entry<Integer, InternalTopologyBuilder.TopicsInfo> topicGroup : topicGroups.entrySet()) {
            if (topicGroup.getValue().sourceTopics.containsAll(sourceTopicsSet)) {
                return new TaskId(topicGroup.getKey(), partition.intValue());
            }
        }
        throw new InvalidStateStoreException("Cannot get state store " + storeName + " because the requested partition " + partition + "is" +
                "not available on this instance");
    }
}

remove (was added via KIP-535 and was never released)
  public <T> T store(final String storeName, final QueryableStoreType<T> queryableStoreType, final boolean staleStores);

  // newly added 
  public <T> T store(final StoreQueryParameters<T> storeQueryParameters);
}