statefun-flink/statefun-flink-core/src/main/java/org/apache/flink/statefun/flink/core/message/MessageTypeInformation.java

/*
 * 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.statefun.flink.core.message;

import java.util.Objects;
import org.apache.flink.api.common.ExecutionConfig;
import org.apache.flink.api.common.typeinfo.TypeInformation;
import org.apache.flink.api.common.typeutils.TypeSerializer;

public class MessageTypeInformation extends TypeInformation<Message> {

  private static final long serialVersionUID = 2L;

  private final MessageFactoryKey messageFactoryKey;

  public MessageTypeInformation(MessageFactoryKey messageFactoryKey) {
    this.messageFactoryKey = Objects.requireNonNull(messageFactoryKey);
  }

  @Override
  public boolean isBasicType() {
    return false;
  }

  @Override
  public boolean isTupleType() {
    return false;
  }

  @Override
  public int getArity() {
    return 0;
  }

  @Override
  public int getTotalFields() {
    return 0;
  }

  @Override
  public Class<Message> getTypeClass() {
    return Message.class;
  }

  @Override
  public boolean isKeyType() {
    return false;
  }

  @Override
  public TypeSerializer<Message> createSerializer(ExecutionConfig executionConfig) {
    return new MessageTypeSerializer(messageFactoryKey);
  }

  @Override
  public String toString() {
    return String.format(
        "MessageTypeInformation(%s: %s",
        messageFactoryKey.getType(), messageFactoryKey.getCustomPayloadSerializerClassName());
  }

  @Override
  public boolean equals(Object o) {
    return o instanceof MessageTypeInformation;
  }

  @Override
  public int hashCode() {
    return getClass().hashCode();
  }

  @Override
  public boolean canEqual(Object o) {
    return o instanceof MessageTypeInformation;
  }
}