/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.type.descriptor.sql;

import java.sql.Types;
import java.util.Locale;
import java.util.Map;

import org.hibernate.internal.util.collections.BoundedConcurrentHashMap;
import org.hibernate.type.descriptor.JdbcTypeNameMapper;

import org.jboss.logging.Logger;

/**
 * @author Steve Ebersole
 */
public class LobTypeMappings {
	private static final Logger log = Logger.getLogger( LobTypeMappings.class );

	/**
	 * Singleton access
	 */
	public static final LobTypeMappings INSTANCE = new LobTypeMappings();

	private final Map<Integer,Integer> lobCodeByNonLobCode;

	private LobTypeMappings() {
		this.lobCodeByNonLobCode =  new BoundedConcurrentHashMap<Integer, Integer>();

		// BLOB mappings
		this.lobCodeByNonLobCode.put( Types.BLOB, Types.BLOB );
		this.lobCodeByNonLobCode.put( Types.BINARY, Types.BLOB );
		this.lobCodeByNonLobCode.put( Types.VARBINARY, Types.BLOB );
		this.lobCodeByNonLobCode.put( Types.LONGVARBINARY, Types.BLOB );

		// CLOB mappings
		this.lobCodeByNonLobCode.put( Types.CLOB, Types.CLOB );
		this.lobCodeByNonLobCode.put( Types.CHAR, Types.CLOB );
		this.lobCodeByNonLobCode.put( Types.VARCHAR, Types.CLOB );
		this.lobCodeByNonLobCode.put( Types.LONGVARCHAR, Types.CLOB );

		// NCLOB mappings
		this.lobCodeByNonLobCode.put( Types.NCLOB, Types.NCLOB );
		this.lobCodeByNonLobCode.put( Types.NCHAR, Types.NCLOB );
		this.lobCodeByNonLobCode.put( Types.NVARCHAR, Types.NCLOB );
		this.lobCodeByNonLobCode.put( Types.LONGNVARCHAR, Types.NCLOB );
	}

	public boolean hasCorrespondingLobCode(int jdbcTypeCode) {
		return lobCodeByNonLobCode.containsKey( jdbcTypeCode );
	}

	public int getCorrespondingLobCode(int jdbcTypeCode) {
		Integer lobTypeCode = lobCodeByNonLobCode.get( jdbcTypeCode );
		if ( lobTypeCode == null ) {
			throw new IllegalArgumentException(
					String.format(
							Locale.ROOT,
							"JDBC type-code [%s (%s)] not known to have a corresponding LOB equivalent",
							jdbcTypeCode,
							JdbcTypeNameMapper.getTypeName( jdbcTypeCode )
					)
			);
		}
		return lobTypeCode;
	}
}