org.hibernate.collection.PersistentIndexedElementHolder Maven / Gradle / Ivy

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//$Id: PersistentIndexedElementHolder.java 10086 2006-07-05 18:17:27Z [email protected] $
package org.hibernate.collection;

import java.io.Serializable;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.dom4j.Element;
import org.hibernate.AssertionFailure;
import org.hibernate.HibernateException;
import org.hibernate.loader.CollectionAliases;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.persister.collection.CollectionPersister;
import org.hibernate.type.NullableType;
import org.hibernate.type.Type;
import org.hibernate.util.CollectionHelper;

/**
 * A persistent wrapper for an XML element
 *
 * @author Gavin King
 */
public abstract class PersistentIndexedElementHolder extends AbstractPersistentCollection {
	protected Element element;
	
	public PersistentIndexedElementHolder(SessionImplementor session, Element element) {
		super(session);
		this.element = element;
		setInitialized();
	}
	
	public static final class IndexedValue {
		String index;
		Object value;
		IndexedValue(String index, Object value) {
			this.index = index;
			this.value = value;
		}
	}
	
	protected static String getIndex(Element element, String indexNodeName, int i) {
		if (indexNodeName!=null) {
			return element.attributeValue(indexNodeName);
		}
		else {
			return Integer.toString(i);
		}
	}
	
	protected static void setIndex(Element element, String indexNodeName, String index) {
		if (indexNodeName!=null) element.addAttribute(indexNodeName, index);
	}
	
	protected static String getIndexAttributeName(CollectionPersister persister) {
		String node = persister.getIndexNodeName();
		return node==null ? null : node.substring(1);
	}
	
	public Serializable getSnapshot(CollectionPersister persister) 
	throws HibernateException {
		
		final Type elementType = persister.getElementType();
		String indexNode = getIndexAttributeName(persister);		
		List elements = element.elements( persister.getElementNodeName() );
		HashMap snapshot = new HashMap( elements.size() );
		for ( int i=0; i