/*
* 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.orm.type.descriptor.java.internal;
import java.io.Reader;
import java.io.StringReader;
import java.sql.Clob;
import java.sql.Types;
import org.hibernate.engine.jdbc.CharacterStream;
import org.hibernate.engine.jdbc.internal.CharacterStreamImpl;
import org.hibernate.orm.type.descriptor.java.spi.AbstractBasicTypeDescriptor;
import org.hibernate.orm.type.descriptor.spi.JdbcRecommendedSqlTypeMappingContext;
import org.hibernate.orm.type.descriptor.spi.WrapperOptions;
import org.hibernate.orm.type.descriptor.sql.spi.SqlTypeDescriptor;
/**
* Descriptor for {@link String} handling.
*
* @author Steve Ebersole
*/
public class StringJavaDescriptor extends AbstractBasicTypeDescriptor<String> {
public static final StringJavaDescriptor INSTANCE = new StringJavaDescriptor();
public StringJavaDescriptor() {
super( String.class );
}
@Override
public SqlTypeDescriptor getJdbcRecommendedSqlType(JdbcRecommendedSqlTypeMappingContext context) {
final int jdbcTypeCode;
if ( context.isNationalized() && context.isLob() ) {
jdbcTypeCode = Types.NCLOB;
}
else if ( context.isLob() ) {
jdbcTypeCode = Types.CLOB;
}
else if ( context.isNationalized() ) {
jdbcTypeCode = Types.NVARCHAR;
}
else {
jdbcTypeCode = Types.VARCHAR;
}
return context.getTypeConfiguration().getSqlTypeDescriptorRegistry().getDescriptor( jdbcTypeCode );
}
public String toString(String value) {
return value;
}
public String fromString(String string) {
return string;
}
@SuppressWarnings({ "unchecked" })
public <X> X unwrap(String value, Class<X> type, WrapperOptions options) {
if ( value == null ) {
return null;
}
if ( String.class.isAssignableFrom( type ) ) {
return (X) value;
}
if ( Reader.class.isAssignableFrom( type ) ) {
return (X) new StringReader( value );
}
if ( CharacterStream.class.isAssignableFrom( type ) ) {
return (X) new CharacterStreamImpl( value );
}
if ( Clob.class.isAssignableFrom( type ) ) {
return (X) options.getLobCreator().createClob( value );
}
if ( DataHelper.isNClob( type ) ) {
return (X) options.getLobCreator().createNClob( value );
}
throw unknownUnwrap( type );
}
public <X> String wrap(X value, WrapperOptions options) {
if ( value == null ) {
return null;
}
if ( String.class.isInstance( value ) ) {
return (String) value;
}
if ( Reader.class.isInstance( value ) ) {
return DataHelper.extractString( (Reader) value );
}
if ( Clob.class.isInstance( value ) ) {
return DataHelper.extractString( (Clob) value );
}
throw unknownWrap( value.getClass() );
}
}