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Kafka Compatible Schema Registry

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/**
 * Copyright (c) 2019 - 2024 StreamNative, Inc.. All Rights Reserved.
 */
/**
 * Licensed 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 io.streamnative.pulsar.handlers.kop.schemaregistry.model;

import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.NoArgsConstructor;
import lombok.experimental.SuperBuilder;

@Data
@EqualsAndHashCode(callSuper = true)
@NoArgsConstructor
@SuperBuilder
public abstract class SubjectKey extends SchemaRegistryKey {

    private String subject;

    public SubjectKey(SchemaRegistryKeyType keyType,
                      String subject) {
        super(keyType);
        this.subject = subject;
    }

    @Override
    public int compareTo(SchemaRegistryKey o) {
        int compare = super.compareTo(o);
        if (compare != 0) {
            return compare;
        }
        SubjectKey otherKey = (SubjectKey) o;
        if (this.subject == null && otherKey.getSubject() == null) {
            return 0;
        } else if (this.subject == null) {
            return -1;
        } else if (otherKey.getSubject() == null) {
            return 1;
        }
        return this.subject.compareTo(otherKey.getSubject());
    }
}