/*

  * Copyright 2009 The Kuali Foundation

  *

  * Licensed under the Educational Community 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.osedu.org/licenses/ECL-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.kuali.student.contract.model.validation;

 import org.kuali.student.contract.model.DictionaryModel;

 import org.kuali.student.contract.model.Service;

 import org.kuali.student.contract.model.ServiceContractModel;

 import org.kuali.student.contract.model.ServiceMethod;

 import org.kuali.student.contract.model.ServiceMethodError;

 import org.kuali.student.contract.model.ServiceMethodParameter;

 import org.kuali.student.contract.model.util.ModelFinder;

 import java.util.ArrayList;

 import java.util.Collection;

 /**

  * This validates a single serviceMethodinoary entry

  * @author nwright

  */

 public class ServiceMethodValidator implements ModelValidator

 {

  private ServiceMethod method;

  private ServiceContractModel model;

  public ServiceMethodValidator (ServiceMethod method, ServiceContractModel model)

  {

   this.method = method;

   this.model = model;

  }

  private Collection errors;

  @Override

  public Collection<String> validate ()

  {

   errors = new ArrayList ();

   basicValidation ();

   for (ServiceMethodParameter param : method.getParameters ())

   {

    errors.addAll (new ServiceMethodParameterValidator (param, method).validate ());

   }

   errors.addAll (new ServiceMethodReturnValueValidator (method.getReturnValue (), method).

    validate ());

   for (ServiceMethodError param : method.getErrors ())

   {

    errors.addAll (new ServiceMethodErrorValidator (param, method).validate ());

   }

   return errors;

  }

  private void basicValidation ()

  {

   if (method.getService ().equals (""))

   {

    addError ("Service is required");

   }

   else

   {

    if (findService (method.getService ()) == null)

    {

     addError ("Service, [" + method.getService () +

      "] could not be found in the list of services");

    }

   }

   if (method.getName ().equals (""))

   {

    addError ("Name is required");

   }

   if (method.getDescription ().equals (""))

   {

    addError ("Description is required");

   }

   if (method.getReturnValue () == null)

   {

    addError ("Return value is required");

   }

  }

  private Service findService (String service)

  {

   // if we are only working with the searchModel then can't validate service

   if ( ! (model instanceof ServiceContractModel))

   {

    return null;

   }

   return new ModelFinder (model).findService (service);

  }

  private void addError (String msg)

  {

   String error = "Error in service method: " + method.getService () + "." +

    method.getName () + ": " + msg;

   if ( ! errors.contains (error))

   {

    errors.add (error);

   }

  }

 }