Hibernate example source code file (DefaultableListType.java)

This example Hibernate source code file (DefaultableListType.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

collectionpersister, defaultablelist, defaultablelist, defaultablelistimpl, defaultablelistimpl, integer, iterator, map, object, object, persistentcollection, persistentcollection, persistentdefaultablelist, sessionimplementor, util

The Hibernate DefaultableListType.java source code

package org.hibernate.test.usercollection.parameterized;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import org.hibernate.EntityMode;
import org.hibernate.collection.spi.PersistentCollection;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.persister.collection.CollectionPersister;
import org.hibernate.usertype.ParameterizedType;
import org.hibernate.usertype.UserCollectionType;

/**
 * Our Hibernate type-system extension for defining our specialized collection
 * contract.
 *
 * @author Holger Brands
 * @author Steve Ebersole
 */
public class DefaultableListType implements UserCollectionType, ParameterizedType {
    private String defaultValue;

	public Object instantiate(int anticipatedSize) {
		DefaultableListImpl list = anticipatedSize < 0 ? new DefaultableListImpl() : new DefaultableListImpl( anticipatedSize );
		list.setDefaultValue( defaultValue );
		return list;
	}

	public PersistentCollection instantiate(
			SessionImplementor session,
			CollectionPersister persister) {
		return new PersistentDefaultableList( session );
	}

	public PersistentCollection wrap(SessionImplementor session, Object collection) {
		return new PersistentDefaultableList( session, ( List ) collection );
	}

	public Iterator getElementsIterator(Object collection) {
		return ( ( DefaultableList ) collection ).iterator();
	}

	public boolean contains(Object collection, Object entity) {
		return ( ( DefaultableList ) collection ).contains( entity );
	}

	public Object indexOf(Object collection, Object entity) {
		int index = ( ( DefaultableList ) collection ).indexOf( entity );
		return index >= 0 ? new Integer( index ) : null;
	}

	public Object replaceElements(
			Object original,
			Object target,
			CollectionPersister persister,
			Object owner,
			Map copyCache,
			SessionImplementor session) {
		DefaultableList result = ( DefaultableList ) target;
		result.clear();
		result.addAll( ( DefaultableList ) original );
		return result;
	}

	public void setParameterValues(Properties parameters) {
        defaultValue = parameters.getProperty( "default" );
	}
}