/*

  * 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.Constraint;

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

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

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

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

 import java.util.Collection;

 /**

  * This validates a single field definition

  * @author nwright

  */

 public class FieldValidator implements ModelValidator {

     private Field field;

     private DictionaryModel model;

     public FieldValidator(Field field, DictionaryModel sheet) {

         this.field = field;

         this.model = sheet;

     }

     private Collection errors;

     @Override

     public Collection<String> validate() {

         ConstraintValidator cv =

                 new ConstraintValidator(field.getInlineConstraint());

         errors = cv.validate();

         if (field.getPrimitive().equalsIgnoreCase(XmlType.COMPLEX)) {

             validateComplexConstraint(field.getInlineConstraint());

             for (String id : field.getConstraintIds()) {

                 Constraint cons = findConstraint(id);

                 if (cons != null) {

                     validateComplexConstraint(cons);

                 }

             }

         }

         return errors;

     }

     private Constraint findConstraint(String id) {

         Constraint cons = new ModelFinder(model).findConstraint(id);

         if (cons != null) {

             return cons;

         }

         addError("Field constraint id, " + id

                 + " is not defined in the bank of constraints");

         return null;

     }

     private void validateComplexConstraint(Constraint cons) {

         if (!cons.getMinLength().equals("")) {

             addError("A minLength is not allowed on a complex field");

         }

         if (!cons.getMaxLength().equals("")) {

             addError("A maxLength is not allowed on a complex field");

         }

         if (!cons.getMinValue().equals("")) {

             addError("A minValue is not allowed on a complex field");

         }

         if (!cons.getMaxValue().equals("")) {

             addError("A maxValue is not allowed on a complex field");

         }

         if (!cons.getValidChars().equals("")) {

             addError("A validChars is not allowed on a complex field");

         }

         if (!cons.getLookup().equals("")) {

             addError("A lookup value is not allowed on a complex field");

         }

     }

     private void addError(String msg) {

         String error = "Error in field " + field.getId() + ": " + msg;

         if (!errors.contains(error)) {

             errors.add(error);

         }

     }

 }