/**

  * Copyright 2010 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.core.statement.naturallanguage;

 import java.util.HashMap;

 import java.util.HashSet;

 import java.util.List;

 import java.util.Map;

 import java.util.Set;

 import org.kuali.student.core.exceptions.DoesNotExistException;

 import org.kuali.student.core.exceptions.OperationFailedException;

 import org.kuali.student.core.statement.dto.ReqCompFieldInfo;

 import org.kuali.student.core.statement.dto.ReqCompFieldTypeInfo;

 import org.kuali.student.core.statement.dto.ReqComponentInfo;

 import org.kuali.student.core.statement.dto.ReqComponentTypeInfo;

 import org.kuali.student.core.statement.service.StatementService;

 /**

  * This is an abstract class for creating a map (containing token/data) used

  * in template translations.

  * 

  * @param <T> Type of context to create

  */

 public abstract class AbstractContext<T> implements Context<T> {

         /**

          * <p>These common shared tokens are needed since velocity doesn't 

          * allow periods in tokens.</p>

          * <p>E.g. kuali.reqComponent.field.type.totalCredits must either be convert to 

          * totalCredits or reqCompFieldType_totalCredits so a template would look 

          * like:</p>

          * <p>'Student must take $totalCredits of MATH 100'</p>

          * or

          * <p>'Student must take $reqCompFieldType_totalCredits of MATH 100'</p>

          */

         protected final static String FIELDS_TOKEN = "fields";

         /*private StatementService statementService;

         public void setStatementService(StatementService statementService) {

                 this.statementService = statementService;

         }

         private void validateReqComponentFields(ReqComponentInfo reqComponent) throws OperationFailedException {

                 try {

                         ReqComponentTypeInfo reqComponentType = statementService.getReqComponentType(reqComponent.getType());

                         Set<String> set = new HashSet<String>();

                         for(ReqCompFieldTypeInfo fieldType : reqComponentType.getReqCompFieldTypeInfos()) {

                                 set.add(fieldType.getFieldDescriptor().getId());

                         }

                         for(ReqCompFieldInfo field : reqComponent.getReqCompFields()) {

                                 if(!set.contains(field.getType())) {

                                         throw new OperationFailedException("Invalid field type: " + field.getType());

                                 }

                         }

                 } catch (Exception e) {

                         throw new OperationFailedException(e.getMessage(), e);

                 }

         }*/

         /**

      * Gets requirement component fields as a map.

      * 

      * @param reqComponent Requirement component

      * @return Map of requirement component fields

      */

         protected Map<String, String> getReqComponentFieldMap(ReqComponentInfo reqComponent) throws OperationFailedException {

                 //validateReqComponentFields(reqComponent);

                 List<ReqCompFieldInfo> fields = reqComponent.getReqCompFields();

         Map<String, String> map = new HashMap<String, String>();

         for (ReqCompFieldInfo field : fields) {

             String type = field.getType();

             String value = field.getValue();

             map.put(type, value);

         }

         return map;

     }

     /**

      * Gets the value of the ReqCompFieldInfo key. 

      * See {@link ReqCompFieldInfo#getKey()} 

      * 

      * @param reqComponent Requirement component

      * @param key <code>ReqCompFieldInfo</code> key

      * @return Value of <code>ReqCompFieldInfo</code>

      */

         protected String getReqComponentFieldValue(ReqComponentInfo reqComponent, String key) throws OperationFailedException {

         return getReqComponentFieldMap(reqComponent).get(key);

     }

     /**

      * Creates the context map (template data) for the requirement component.

      * Also, adds the field token map to the context map.

      *

      * @param reqComponent Requirement component

      * @throws DoesNotExistException If CLU, CluSet or relation does not exist

      */

     public Map<String, Object> createContextMap(ReqComponentInfo reqComponent) throws OperationFailedException {

         Map<String, Object> contextMap = new HashMap<String, Object>();

         contextMap.put(FIELDS_TOKEN, getReqComponentFieldMap(reqComponent));

         return contextMap;

     }

 }