/*
    * Copyright 2008 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.ole.module.purap.document.validation.impl;
  
  import org.kuali.ole.module.purap.PurapConstants;
  import org.kuali.ole.module.purap.PurapKeyConstants;
  import org.kuali.ole.module.purap.businessobject.PurApItem;
  import org.kuali.ole.module.purap.businessobject.PurchasingItemBase;
  import org.kuali.ole.module.purap.document.PurchasingDocument;
  import org.kuali.ole.sys.context.SpringContext;
  import org.kuali.ole.sys.document.validation.GenericValidation;
  import org.kuali.ole.sys.document.validation.event.AttributedDocumentEvent;
  import org.kuali.rice.kew.api.doctype.DocumentTypeService;
  import org.kuali.rice.krad.util.GlobalVariables;
  
  public class PurchasingProcessContainsAtLeastOneItemValidation extends GenericValidation {
  
      /**
       * Validates that the document contains at least one item.
       *
       * @param purDocument the purchasing document to be validated
       * @return boolean false if the document does not contain at least one item.
       */
      public boolean validate(AttributedDocumentEvent event) {
          boolean valid = false;
          PurchasingDocument purDocument = (PurchasingDocument) event.getDocument();
          for (PurApItem item : purDocument.getItems()) {
              if (!((PurchasingItemBase) item).isEmpty() && item.getItemType().isLineItemIndicator()) {
  
                  return true;
              }
          }
          String documentType = getDocumentTypeLabel(purDocument.getDocumentHeader().getWorkflowDocument().getDocumentTypeName());
  
          if (!valid) {
              GlobalVariables.getMessageMap().putError(PurapConstants.ITEM_TAB_ERROR_PROPERTY, PurapKeyConstants.ERROR_ITEM_REQUIRED, documentType);
          }
  
          return valid;
      }
  
      protected String getDocumentTypeLabel(String documentTypeName) {
          return SpringContext.getBean(DocumentTypeService.class).getDocumentTypeByName(documentTypeName).getLabel();
      }
  
  }