/*
 * Copyright 2020 Google LLC
 *
 * 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.google.cloud.solutions.datalineage.service;

import java.io.Serializable;

/**
 * Factory to generate SchemaLoader instances.
 */
public interface ZetaSqlSchemaLoaderFactory extends Serializable {

  ZetaSqlSchemaLoader newLoader();

  /**
   * Returns a SchemaLoader which always returns  {@code null} schema.
   */
  static ZetaSqlSchemaLoaderFactory emptyLoaderFactory() {
    return () -> null;
  }
}
