/**
 *                                                                            
 *  Copyright (c) 2011, 2016 - Loetz GmbH&Co.KG (69115 Heidelberg, Germany) 
 *                                                                            
 *  All rights reserved. This program and the accompanying materials           
 *  are made available under the terms of the Eclipse Public License 2.0        
 *  which accompanies this distribution, and is available at                  
 *  https://www.eclipse.org/legal/epl-2.0/
 *
 *  SPDX-License-Identifier: EPL-2.0                                 
 *                                                                            
 *  Contributors:                                                      
 * 	   Christophe Loetz (Loetz GmbH&Co.KG) - initial implementation
 * 
 */
 package org.eclipse.osbp.runtime.jsr303.validation.common;

import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import javax.validation.ConstraintViolation;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;

import org.eclipse.osbp.runtime.common.validation.IStatus;
import org.eclipse.osbp.runtime.common.validation.IValidationParticipant;
import org.eclipse.osbp.runtime.common.validation.ValidationKind;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;
import org.osgi.service.component.annotations.ReferenceCardinality;
import org.osgi.service.component.annotations.ReferencePolicy;

@Component(immediate = true)
public class JSR303ValidationParticipant implements IValidationParticipant {

	private ValidatorFactory valFactory;

	@SuppressWarnings("rawtypes")
	@Override
	public Set<IStatus> validate(Object object, ValidationKind kind,
			Map<String, Object> properties) {
		if (valFactory == null) {
			throw new IllegalArgumentException(
					"No ValidatorFactory bound to service");
		}

		Validator validator = valFactory.getValidator();
		Set<ConstraintViolation<Object>> tempResult = validator.validate(
				object, new Class[0]);

		Set<IStatus> result = ValidationUtil.getStatus(getClass(),
				new HashSet<ConstraintViolation>(tempResult));

		return result;
	}

	/**
	 * Binds the validator factory to validate contraints placed on the dto
	 * class.
	 * 
	 * @param valFactory
	 *            the service
	 */
	@Reference(cardinality = ReferenceCardinality.MANDATORY, unbind = "unbindValidatorFactory", policy = ReferencePolicy.DYNAMIC)
	protected void bindValidatorFactory(final ValidatorFactory valFactory) {
		this.valFactory = valFactory;
	}

	/**
	 * Unbinds the service from this component. <br>
	 * 
	 * @param valFactory
	 *            the service
	 */
	protected void unbindValidatorFactory(final ValidatorFactory valFactory) {
		this.valFactory = null;
	}

}