org.hibernate.type.descriptor.java.StringTypeDescriptor Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.type.descriptor.java;
import java.io.Reader;
import java.io.StringReader;
import java.sql.Clob;
import org.hibernate.engine.jdbc.CharacterStream;
import org.hibernate.engine.jdbc.internal.CharacterStreamImpl;
import org.hibernate.type.descriptor.WrapperOptions;
/**
* Descriptor for {@link String} handling.
*
* @author Steve Ebersole
*/
public class StringTypeDescriptor extends AbstractTypeDescriptor {
public static final StringTypeDescriptor INSTANCE = new StringTypeDescriptor();
public StringTypeDescriptor() {
super( String.class );
}
public String toString(String value) {
return value;
}
public String fromString(String string) {
return string;
}
@SuppressWarnings({ "unchecked" })
public X unwrap(String value, Class 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 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() );
}
}