/*
* Hibernate OGM, Domain model persistence for NoSQL datastores
*
* 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.ogm.datastore.mongodb.type.impl;
import org.bson.types.ObjectId;
import org.hibernate.type.descriptor.WrapperOptions;
import org.hibernate.type.descriptor.java.AbstractTypeDescriptor;
/**
* Descriptor for persisting {@code String}s as {@link ObjectId}s in the datastore.
*
* @author Gunnar Morling
*/
public class StringAsObjectIdTypeDescriptor extends AbstractTypeDescriptor<String> {
public static final StringAsObjectIdTypeDescriptor INSTANCE = new StringAsObjectIdTypeDescriptor();
public StringAsObjectIdTypeDescriptor() {
super( String.class );
}
@Override
public String toString(String value) {
return value == null ? null : value;
}
@Override
public String fromString(String string) {
return string;
}
@Override
@SuppressWarnings({ "unchecked" })
public <X> X unwrap(String value, Class<X> type, WrapperOptions options) {
if ( value == null ) {
return null;
}
return (X) new ObjectId( value );
}
@Override
public <X> String wrap(X value, WrapperOptions options) {
if ( value == null ) {
return null;
}
if ( ObjectId.class.isInstance( value ) ) {
return ( (ObjectId) value ).toString();
}
throw unknownWrap( value.getClass() );
}
}