spring DerbyTableMetaDataProvider 源码

  • 2022-08-08
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spring DerbyTableMetaDataProvider 代码

文件路径:/spring-jdbc/src/main/java/org/springframework/jdbc/core/metadata/DerbyTableMetaDataProvider.java

/*
 * Copyright 2002-2018 the original author or authors.
 *
 * 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
 *
 *      https://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.springframework.jdbc.core.metadata;

import java.sql.DatabaseMetaData;
import java.sql.SQLException;

/**
 * The Derby specific implementation of {@link TableMetaDataProvider}.
 * Overrides the Derby meta-data info regarding retrieving generated keys.
 *
 * @author Thomas Risberg
 * @since 3.0
 */
public class DerbyTableMetaDataProvider extends GenericTableMetaDataProvider {

	private boolean supportsGeneratedKeysOverride = false;


	public DerbyTableMetaDataProvider(DatabaseMetaData databaseMetaData) throws SQLException {
		super(databaseMetaData);
	}


	@Override
	public void initializeWithMetaData(DatabaseMetaData databaseMetaData) throws SQLException {
		super.initializeWithMetaData(databaseMetaData);
		if (!databaseMetaData.supportsGetGeneratedKeys()) {
			if (logger.isInfoEnabled()) {
				logger.info("Overriding supportsGetGeneratedKeys from DatabaseMetaData to 'true'; it was reported as " +
						"'false' by " + databaseMetaData.getDriverName() + " " + databaseMetaData.getDriverVersion());
			}
			this.supportsGeneratedKeysOverride = true;
		}
	}

	@Override
	public boolean isGetGeneratedKeysSupported() {
		return (super.isGetGeneratedKeysSupported() || this.supportsGeneratedKeysOverride);
	}

}

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