org.jboss.seam.contexts.EntityBeanMap Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jboss-seam Show documentation

Seam core module for Seam framework integrated with JSF2

There is a newer version: 3.2.26.ayg

package org.jboss.seam.contexts;

import java.util.HashMap;
import java.util.Map;

/**
 * Swizzles entities held in the conversation context at
 * the end of each request.
 * 
 * @see PassivatedEntity
 * 
 * @author Gavin King
 *
 */
class EntityBeanMap extends AbstractEntityBeanCollection {
	private static final long serialVersionUID = -2884601453783925804L;

	private Map map;
	private Map passivatedEntityMap;

	public EntityBeanMap(Map instance) {
		super();
		this.map = instance;
	}

	@Override
	protected Iterable getPassivatedEntities() {
		return passivatedEntityMap.values();
	}

	@Override
	protected Object getEntityCollection() {
		return map;
	}

	@Override
	protected void clearPassivatedEntities() {
		passivatedEntityMap = null;
	}

	@Override
	protected boolean isPassivatedEntitiesInitialized() {
		return passivatedEntityMap != null;
	}

	@Override
	protected void activateAll() {
		for (Map.Entry me : passivatedEntityMap.entrySet()) {
			map.put(me.getKey(), me.getValue().toEntityReference(true));
		}
		clearPassivatedEntities();
	}

	@Override
	protected void passivateAll() {
		HashMap newPassivatedMap = new HashMap(map.size());
		boolean found = false;
		for (Map.Entry me : map.entrySet()) {
			Object value = me.getValue();
			if (value != null) {
				PassivatedEntity passivatedEntity = PassivatedEntity.passivateEntity(value);
				if (passivatedEntity != null) {
					if (!found) {
						map = new HashMap(map);
						found = true;
					}

					//this would be dangerous, except that we 
					//are doing it to a copy of the original 
					//list:
					map.remove(me.getKey());
					newPassivatedMap.put(me.getKey(), passivatedEntity);
				}
			}
		}
		if (found) {
			passivatedEntityMap = newPassivatedMap;
		}
	}

}