/* Copyright 2004-2005 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */ 
package org.codehaus.groovy.grails.orm.hibernate.validation;

import java.util.Collection;
import java.util.Iterator;

import org.codehaus.groovy.grails.commons.GrailsDomainClass;
import org.hibernate.SessionFactory;
import org.springframework.beans.BeanWrapper;
import org.springframework.beans.BeanWrapperImpl;
import org.springframework.orm.hibernate3.HibernateTemplate;
import org.springframework.validation.Errors;
import org.springframework.validation.Validator;
/**
 * A validator that validates a domain class based on the applied constraints 
 * 
 * @author Graeme Rocher
 * @since 07-Nov-2005
 */
public class GrailsDomainClassValidator implements Validator {

	private Collection constrainedProperties;
	private Class targetClass;
	private HibernateTemplate template;
	private GrailsDomainClass domainClass;
	private SessionFactory sessionFactory;

	public boolean supports(Class clazz) {
		return this.targetClass.equals( clazz );
	}
	
	
	/**
	 * @param domainClass The domainClass to set.
	 */
	public void setDomainClass(GrailsDomainClass domainClass) {
		this.domainClass = domainClass;
		this.domainClass.setValidator(this);
		this.targetClass = this.domainClass.getClazz();
		this.constrainedProperties = domainClass.getConstrainedProperties().values();
	}

	/**
	 * @param sessionFactory The sessionFactory to set.
	 */
	public void setSessionFactory(SessionFactory sessionFactory) {
		this.sessionFactory = sessionFactory;
		this.template = new HibernateTemplate(this.sessionFactory);
	}

	public void validate(Object obj, Errors errors) {
		BeanWrapper bean = new BeanWrapperImpl(obj);
		
		for (Iterator i = constrainedProperties.iterator(); i.hasNext();) {
			ConstrainedPersistentProperty c = (ConstrainedPersistentProperty)i.next();			
			c.setHibernateTemplate(this.template);			
			c.validate(bean.getPropertyValue( c.getPropertyName() ),errors);
		}

	}

	public void setHibernateTemplate(HibernateTemplate template) {
		this.template = template;
	}

}