/*
 * Copyright 2018 Confluent Inc.
 * Portions Copyright 2020 Amazon.com, Inc. or its affiliates.
 * 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 com.amazonaws.services.schemaregistry.kafkaconnect.avrodata;

import java.util.List;

/**
 * An interface for validating the compatibility of a single schema against
 * another.
 *
 * <p>What makes one schema compatible with another is not defined by the contract.
 * </p>
 */
public interface SchemaValidationStrategy {

    /**
     * Validates that one schema is compatible with another.
     *
     * @param toValidate The schema to validate
     * @param existing The schema to validate against
     * @return List of error message, otherwise empty list
     */
    List<String> validate(ParsedSchema toValidate, ParsedSchema existing);
}
