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/*
 * 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.runtime.state.ttl;

import org.apache.flink.api.common.state.StateTtlConfig;
import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.runtime.state.internal.InternalKvState;
import org.apache.flink.util.FlinkRuntimeException;
import org.apache.flink.util.function.SupplierWithException;
import org.apache.flink.util.function.ThrowingConsumer;

/**
 * Base class for TTL logic wrappers of state objects.
 *
 * @param  The type of key the state is associated to
 * @param  The type of the namespace
 * @param  The type of values kept internally in state without TTL
 * @param  The type of values kept internally in state with TTL
 * @param  Type of originally wrapped state object
 */
abstract class AbstractTtlState>
	extends AbstractTtlDecorator
	implements InternalKvState {
	private final TypeSerializer valueSerializer;

	AbstractTtlState(S original, StateTtlConfig config, TtlTimeProvider timeProvider, TypeSerializer valueSerializer) {
		super(original, config, timeProvider);
		this.valueSerializer = valueSerializer;
	}

	 T getWithTtlCheckAndUpdate(
		SupplierWithException, SE> getter,
		ThrowingConsumer, CE> updater) throws SE, CE {
		return getWithTtlCheckAndUpdate(getter, updater, original::clear);
	}

	@Override
	public TypeSerializer getKeySerializer() {
		return original.getKeySerializer();
	}

	@Override
	public TypeSerializer getNamespaceSerializer() {
		return original.getNamespaceSerializer();
	}

	@Override
	public TypeSerializer getValueSerializer() {
		return valueSerializer;
	}

	@Override
	public void setCurrentNamespace(N namespace) {
		original.setCurrentNamespace(namespace);
	}

	@Override
	public byte[] getSerializedValue(
		byte[] serializedKeyAndNamespace,
		TypeSerializer safeKeySerializer,
		TypeSerializer safeNamespaceSerializer,
		TypeSerializer safeValueSerializer) {
		throw new FlinkRuntimeException("Queryable state is not currently supported with TTL.");
	}

	@Override
	public void clear() {
		original.clear();
	}
}