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/*
 * Demoiselle Framework
 * Copyright (C) 2010 SERPRO
 * ----------------------------------------------------------------------------
 * This file is part of Demoiselle Framework.
 * 
 * Demoiselle Framework is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License version 3
 * as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License version 3
 * along with this program; if not,  see 
 * or write to the Free Software Foundation, Inc., 51 Franklin Street,
 * Fifth Floor, Boston, MA  02110-1301, USA.
 * ----------------------------------------------------------------------------
 * Este arquivo é parte do Framework Demoiselle.
 * 
 * O Framework Demoiselle é um software livre; você pode redistribuí-lo e/ou
 * modificá-lo dentro dos termos da GNU LGPL versão 3 como publicada pela Fundação
 * do Software Livre (FSF).
 * 
 * Este programa é distribuído na esperança que possa ser útil, mas SEM NENHUMA
 * GARANTIA; sem uma garantia implícita de ADEQUAÇÃO a qualquer MERCADO ou
 * APLICAÇÃO EM PARTICULAR. Veja a Licença Pública Geral GNU/LGPL em português
 * para maiores detalhes.
 * 
 * Você deve ter recebido uma cópia da GNU LGPL versão 3, sob o título
 * "LICENCA.txt", junto com esse programa. Se não, acesse 
 * ou escreva para a Fundação do Software Livre (FSF) Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02111-1301, USA.
 */
package br.gov.frameworkdemoiselle.internal.implementation;

import java.util.Iterator;
import java.util.logging.Logger;

import javax.validation.ConstraintViolation;
import javax.validation.ConstraintViolationException;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.ExceptionMapper;
import javax.ws.rs.ext.Provider;

import br.gov.frameworkdemoiselle.UnprocessableEntityException;
import br.gov.frameworkdemoiselle.util.Beans;
import br.gov.frameworkdemoiselle.util.NameQualifier;
import br.gov.frameworkdemoiselle.util.ResourceBundle;

@Provider
public class ConstraintViolationExceptionMapper implements ExceptionMapper {

	private transient ResourceBundle bundle;

	private transient Logger logger;

	@Override
	public Response toResponse(ConstraintViolationException exception) {
		UnprocessableEntityException failed = new UnprocessableEntityException();
		int status = new UnprocessableEntityException().getStatusCode();

		for (Iterator> iter = exception.getConstraintViolations().iterator(); iter.hasNext();) {
			ConstraintViolation violation = iter.next();
			failed.addViolation(violation.getPropertyPath().toString(), violation.getMessage());
		}

		getLogger().fine(getBundle().getString("mapping-violations", status, failed.getViolations().toString()));

		Object entity = failed.getViolations();
		String mediaType = failed.getMediaType();

		return Response.status(status).entity(entity).type(mediaType).build();
	}

	private ResourceBundle getBundle() {
		if (bundle == null) {
			bundle = Beans.getReference(ResourceBundle.class, new NameQualifier("demoiselle-rest-bundle"));
		}

		return bundle;
	}

	private Logger getLogger() {
		if (logger == null) {
			logger = Beans.getReference(Logger.class, new NameQualifier("br.gov.frameworkdemoiselle.exception"));
		}

		return logger;
	}
}