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1   /**
2    * Copyright 2005-2014 The Kuali Foundation
3    *
4    * Licensed under the Educational Community License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    * http://www.opensource.org/licenses/ecl2.php
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.kuali.rice.krad.datadictionary.validation.processor;
17  
18  import org.kuali.rice.core.api.util.RiceKeyConstants;
19  import org.kuali.rice.krad.datadictionary.exception.AttributeValidationException;
20  import org.kuali.rice.krad.datadictionary.validation.AttributeValueReader;
21  import org.kuali.rice.krad.datadictionary.validation.ErrorLevel;
22  import org.kuali.rice.krad.datadictionary.validation.ValidationUtils;
23  import org.kuali.rice.krad.datadictionary.validation.constraint.Constraint;
24  import org.kuali.rice.krad.datadictionary.validation.constraint.PrerequisiteConstraint;
25  import org.kuali.rice.krad.datadictionary.validation.result.ConstraintValidationResult;
26  
27  import java.util.Collection;
28  
29  /**
30   * @param <C> constraint type
31   * @author Kuali Rice Team (rice.collab@kuali.org)
32   */
33  public abstract class BasePrerequisiteConstraintProcessor<C extends Constraint> extends MandatoryElementConstraintProcessor<C> {
34  
35      protected ConstraintValidationResult processPrerequisiteConstraint(PrerequisiteConstraint constraint,
36              AttributeValueReader attributeValueReader) throws AttributeValidationException {
37          ConstraintValidationResult constraintValidationResult = new ConstraintValidationResult(getName());
38  
39          if (constraint == null) {
40              constraintValidationResult.setStatus(ErrorLevel.NOCONSTRAINT);
41              return constraintValidationResult;
42          }
43  
44          // TODO: Does this code need to be able to look at more than just the other immediate members of the object?
45          String attributeName = constraint.getPropertyName();
46  
47          if (ValidationUtils.isNullOrEmpty(attributeName)) {
48              throw new AttributeValidationException(
49                      "Prerequisite constraints must include the name of the attribute that is required");
50          }
51  
52          Object value = attributeValueReader.getValue(attributeName);
53  
54          boolean isSuccessful = true;
55  
56          if (value instanceof java.lang.String) {
57              isSuccessful = ValidationUtils.hasText((String) value);
58          } else if (value instanceof Collection) {
59              isSuccessful = (((Collection<?>) value).size() > 0);
60          } else {
61              isSuccessful = (null != value) ? true : false;
62          }
63  
64          if (!isSuccessful) {
65              String label = attributeValueReader.getLabel(attributeName);
66              if (label != null) {
67                  attributeName = label;
68              }
69  
70              constraintValidationResult.setError(RiceKeyConstants.ERROR_REQUIRES_FIELD, attributeName);
71              constraintValidationResult.setConstraintLabelKey(constraint.getMessageKey());
72              constraintValidationResult.setErrorParameters(constraint.getValidationMessageParamsArray());
73          }
74  
75          return constraintValidationResult;
76      }
77  
78  }