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This module contains the Table/SQL API for writing table programs within the table ecosystem using the Java programming language.

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.flink.table.catalog;

import org.apache.flink.table.api.TableSchema;

import java.util.HashMap;
import java.util.Map;
import java.util.Optional;

/**
 * An implementation of catalog view.
 */
public class CatalogViewImpl extends AbstractCatalogView {
	public CatalogViewImpl(
			String originalQuery,
			String expandedQuery,
			TableSchema schema,
			Map properties,
			String comment) {
		super(originalQuery, expandedQuery, schema, properties, comment);
	}

	@Override
	public CatalogBaseTable copy() {
		return new CatalogViewImpl(
			getOriginalQuery(),
			getExpandedQuery(),
			getSchema().copy(),
			new HashMap<>(getProperties()),
			getComment()
		);
	}

	@Override
	public Optional getDescription() {
		return Optional.ofNullable(getComment());
	}

	@Override
	public Optional getDetailedDescription() {
		return Optional.of("This is a catalog view implementation");
	}
}