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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 io.streamnative.pulsar.handlers.kop.schemaregistry.model.rest.SchemaReference;
import java.util.Base64;
import java.util.Collections;
import java.util.List;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.NoArgsConstructor;
import lombok.experimental.SuperBuilder;

/**
 * Schema value for storing in the schema storage cache.
 */
@Data
@EqualsAndHashCode(callSuper = true)
@NoArgsConstructor
@SuperBuilder
public class SchemaValue extends SubjectValue {

    private Integer version;
    private Integer id;
    private String schema;
    private List references;
    private boolean deleted;
    private String type;
    private String md5;

    public Schema toSchema() {
        return Schema.builder()
            .subject(getSubject())
            .version(version)
            .id(id)
            .schema(schema)
            .references(references == null ? Collections.emptyList() : references)
            .type(type)
            .build();
    }

    public byte[] getMd5Bytes() {
        return md5 == null ? null : Base64.getDecoder().decode(md5);
    }

}