/*

  * 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);

         }

     }

 }