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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.exceptions.InvalidVersionException;

/**
 * A valid version id should be a positive integer between 1 and 2^31-1. -1 is a special version id
 * that indicates the "latest" version under a subject
 */
public class VersionId {
    private final int version;

    public VersionId(String version) throws InvalidVersionException {
        if (version.trim().equalsIgnoreCase("latest")) {
            this.version = -1;
        } else {
            try {
                this.version = Integer.parseInt(version.trim());
            } catch (NumberFormatException nfe) {
                throw new InvalidVersionException(version);
            }
            assertValidVersion();
        }
    }

    public int getVersionId() {
        return this.version;
    }

    public boolean isLatest() {
        return version == -1;
    }

    private void assertValidVersion() throws InvalidVersionException {
        if (this.version <= 0 && this.version != -1) {
            throw new InvalidVersionException(String.valueOf(this.version));
        }
    }
}