package com.amway.validation;

import java.util.*;

import org.apache.log4j.Logger;
import org.aspectj.lang.*;
import org.apache.commons.validator.ValidatorException;

import com.amway.model.*;
import com.amway.service.*;
import com.amway.exception.*;
import com.amway.resource.Message;

/**
* Validate IBO in business service delegate (SOA interface for web services).
*
* @author David Wong
*/
public aspect IboValidationAspect {
	static Logger log = Logger.getLogger("trace");

	/**
	* Validate an IBO before persistent operations on it.
	* Since the project is for an RIA client, any failed validation checks are considered
	* an error since they should have been caught by the client validation first. Validation
	* errors are logged instead of sent to the client.
	*
	* Therefore the client and server validations should be kept in sync.
	*
	* If there is a change to a HTML based client (where javascript validation can be turned
	* off) then the logic here should be changed to return validation error messages to the
	* client.
	*
	* @author David Wong
	*/
	void around(AgsServiceDelegate del, Ibo ibo) throws AgsException :
	execution(public * AgsServiceDelegate.*(Ibo))
	&& !execution(* AgsServiceDelegate+.handle*(..))
	&& target(del)
	&& args(ibo)
	{
		if (ibo == null)
		{
			// should really be IllegalArgumentException, except the joinpoint is at the component interface
			// so we throw a business exception
			throw new AgsException(Message.message("error.validation.missing"));
		}
		log.debug("About validate IBO for " + thisJoinPointStaticPart.getSignature().getName() + " with IBO " + ibo.getIboNumber());

	  try {
		// validate the IBO
		IboValidator validator = new IboValidator();
		List errors = new ArrayList();
		boolean valid = validator.validate(ibo, errors);

		if (valid)
		{
			proceed(del, ibo);
		}
		else
		{
			// create error msg
			String domainDescriptor = Message.message("Ibo.descriptor");
			Object[] args = {domainDescriptor};
			String msg = Message.message("error.validation.fail", args);

			// log the validation errors
			log.error(msg + ":");
			for (Iterator iter = errors.iterator(); iter.hasNext(); )
			{
				log.error(iter.next());
			}

			// throw exception to indicate failed validation
			throw new AgsException(msg);
		}
	  } catch (ValidatorException ve) {
		  log.error(ve);
		  throw new AgsException(ve);
	  }
	}


}