/**
    * Copyright 2005-2014 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.opensource.org/licenses/ecl2.php
    *
   * 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.rice.krms.impl.ui;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.core.api.criteria.QueryByCriteria;
  import org.kuali.rice.core.api.criteria.QueryResults;
  import org.kuali.rice.core.api.util.ConcreteKeyValue;
  import org.kuali.rice.core.api.util.KeyValue;
  import org.kuali.rice.kns.service.KNSServiceLocator;
  import org.kuali.rice.krad.service.KRADServiceLocator;
  import org.kuali.rice.krad.uif.control.UifKeyValuesFinderBase;
  import org.kuali.rice.krad.uif.view.ViewModel;
  import org.kuali.rice.krad.web.form.MaintenanceDocumentForm;
  import org.kuali.rice.krms.impl.repository.CategoryBo;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.List;
  import java.util.Map;
  
  /**
   * Helper class that returns all category types that are valid for the given context.
   */
  public class CategoryValuesFinder extends UifKeyValuesFinderBase {
  
      private boolean blankOption;
  
      /**
       * @return the blankOption
       */
      public boolean isBlankOption() {
          return this.blankOption;
      }
  
      /**
       * @param blankOption the blankOption to set
       */
      public void setBlankOption(boolean blankOption) {
          this.blankOption = blankOption;
      }
  
      @Override
      public List<KeyValue> getKeyValues(ViewModel model) {
          List<KeyValue> keyValues = new ArrayList<KeyValue>();
  
          MaintenanceDocumentForm maintenanceForm = (MaintenanceDocumentForm) model;
          AgendaEditor agendaEditor = ((AgendaEditor) maintenanceForm.getDocument().getNewMaintainableObject().getDataObject());
  
          // if we have an agenda w/ a selected context
          if (agendaEditor.getAgenda() != null && StringUtils.isNotBlank(agendaEditor.getAgenda().getContextId())) {
  
              // key off the namespace
  
              String namespace = agendaEditor.getNamespace();
  
              if(blankOption){
                  keyValues.add(new ConcreteKeyValue("", ""));
              }
  
              QueryByCriteria.Builder criteriaBuilder = QueryByCriteria.Builder.forAttribute("namespace", namespace);
              criteriaBuilder.setOrderByAscending("name");
  
              QueryResults<CategoryBo> categoryResults =
                      KRADServiceLocator.getDataObjectService().findMatching(CategoryBo.class, criteriaBuilder.build());
              List<CategoryBo> categories = categoryResults.getResults();
  
              for (CategoryBo category : categories) {
                  keyValues.add(new ConcreteKeyValue(category.getId(), category.getName()));
              }
          }
  
          return keyValues;
      }
  }