/*
 * 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.jobgraph;

import java.util.Objects;

/** An ID for physical instance of the operator. */
public class OperatorInstanceID {

    private final int subtaskId;
    private final OperatorID operatorId;

    public static OperatorInstanceID of(int subtaskId, OperatorID operatorID) {
        return new OperatorInstanceID(subtaskId, operatorID);
    }

    public OperatorInstanceID(int subtaskId, OperatorID operatorId) {
        this.subtaskId = subtaskId;
        this.operatorId = operatorId;
    }

    public int getSubtaskId() {
        return subtaskId;
    }

    public OperatorID getOperatorId() {
        return operatorId;
    }

    @Override
    public int hashCode() {
        return Objects.hash(subtaskId, operatorId);
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (!(obj instanceof OperatorInstanceID)) {
            return false;
        }
        OperatorInstanceID other = (OperatorInstanceID) obj;
        return this.subtaskId == other.subtaskId
                && Objects.equals(this.operatorId, other.operatorId);
    }

    @Override
    public String toString() {
        return String.format("<%d, %s>", subtaskId, operatorId);
    }
}