/**
 * 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.gora.flink;

import org.apache.flink.api.common.typeinfo.TypeInfoFactory;
import org.apache.flink.api.common.typeinfo.TypeInformation;
import org.apache.gora.persistency.impl.PersistentBase;

import java.lang.reflect.Type;
import java.util.Map;

/**
 * Create Flink Type info factory for persistent data beans. Type information contains details
 * such as how the values of particular type serialized and deserialized.
 */
public class PersistentTypeInfoFactory<T extends PersistentBase> extends TypeInfoFactory<T> {

  @Override
  public TypeInformation<T> createTypeInfo(Type type,
                                           Map<String, TypeInformation<?>> genericParameters) {
    // Return PersistentTypeInfo which is extended GenericTypeInfo leverage own serializer.
    // - serialization of all generic types in Flink are carried out by KryoSerializer.
    // One way of plugin custom serialization is to extend TypeInformation<T> interface and have our own,
    // custom Flink type information and have our own custom serializer registered there,
    // based on serialization performance on different engines.
    return new PersistentTypeInfo<T>((Class) type);
  }
}