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The core O/RM functionality as provided by Hibernate

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/*
 * 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 .
 */
package org.hibernate.type.descriptor.sql;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;

import org.hibernate.type.descriptor.ValueBinder;
import org.hibernate.type.descriptor.ValueExtractor;
import org.hibernate.type.descriptor.WrapperOptions;
import org.hibernate.type.descriptor.java.JavaTypeDescriptor;

/**
 * Descriptor for {@link Types#BIT BIT} handling.
 * 
 * Note that JDBC is very specific about its use of the type BIT to mean a single binary digit, whereas
 * SQL defines BIT having a parameterized length.
 *
 * @author Steve Ebersole
 */
public class BitTypeDescriptor implements SqlTypeDescriptor {
	public static final BitTypeDescriptor INSTANCE = new BitTypeDescriptor();

	public BitTypeDescriptor() {
	}

	public int getSqlType() {
		return Types.BIT;
	}

	@Override
	public boolean canBeRemapped() {
		return true;
	}

	@Override
	public  ValueBinder getBinder(final JavaTypeDescriptor javaTypeDescriptor) {
		return new BasicBinder( javaTypeDescriptor, this ) {
			@Override
			protected void doBind(PreparedStatement st, X value, int index, WrapperOptions options) throws SQLException {
				st.setBoolean( index, javaTypeDescriptor.unwrap( value, Boolean.class, options ) );
			}

			@Override
			protected void doBind(CallableStatement st, X value, String name, WrapperOptions options)
					throws SQLException {
				st.setBoolean( name, javaTypeDescriptor.unwrap( value, Boolean.class, options ) );
			}
		};
	}

	@Override
	public  ValueExtractor getExtractor(final JavaTypeDescriptor javaTypeDescriptor) {
		return new BasicExtractor( javaTypeDescriptor, this ) {
			@Override
			protected X doExtract(ResultSet rs, String name, WrapperOptions options) throws SQLException {
				return javaTypeDescriptor.wrap( rs.getBoolean( name ), options );
			}

			@Override
			protected X doExtract(CallableStatement statement, int index, WrapperOptions options) throws SQLException {
				return javaTypeDescriptor.wrap( statement.getBoolean( index ), options );
			}

			@Override
			protected X doExtract(CallableStatement statement, String name, WrapperOptions options) throws SQLException {
				return javaTypeDescriptor.wrap( statement.getBoolean( name ), options );
			}
		};
	}
}