/**

  * Copyright 2005-2011 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.kuali.rice.krad.service.BusinessObjectService;

 import org.kuali.rice.krad.service.KRADServiceLocator;

 import org.kuali.rice.krms.api.repository.proposition.PropositionParameterType;

 import org.kuali.rice.krms.api.repository.proposition.PropositionType;

 import org.kuali.rice.krms.impl.repository.PropositionBo;

 import org.kuali.rice.krms.impl.repository.PropositionParameterBo;

 import org.kuali.rice.krms.impl.repository.TermBo;

 import java.io.Serializable;

 import java.util.List;

 /**

  * abstract data class for the rule tree {@link Node}s

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  *

  */

 public class SimplePropositionNode extends RuleTreeNode {

     private static final long serialVersionUID = -629088492909384804L;

     public static final String NODE_TYPE = "ruleTreeNode simplePropositionNode";

     protected String parameterDisplayString;

     public SimplePropositionNode(PropositionBo proposition){

         super(proposition);

         setupParameterDisplayString();

     }

     private void setupParameterDisplayString(){

         if (proposition != null && proposition.getPropositionTypeCode().equalsIgnoreCase(PropositionType.SIMPLE.getCode())){

             // Simple Propositions should have 3 parameters ordered in reverse polish notation.

             // TODO: enhance to get term names for term type parameters.

             List<PropositionParameterBo> parameters = proposition.getParameters();

             if (parameters != null && parameters.size() == 3){

                 setParameterDisplayString(getParamValue(parameters.get(0)) 

                         + " " + getParamValue(parameters.get(2))

                         + " " + getParamValue(parameters.get(1)));

             } else {

                 // should not happen

             }

         }

     }

     private String getParamValue(PropositionParameterBo prop){

         if (PropositionParameterType.TERM.getCode().equalsIgnoreCase(prop.getParameterType())){

             //TODO: use termBoService

             String termId = prop.getValue();

             TermBo term = getBoService().findBySinglePrimaryKey(TermBo.class,termId);

             if (term!=null){

                 return term.getSpecification().getName();

             }

             return "";

         } else {

             return prop.getValue();

         }

     }

     /**

      * @return the parameterDisplayString

      */

     public String getParameterDisplayString() {

         return this.parameterDisplayString;

     }

     /**

      * @param parameterDisplayString the parameterDisplayString to set

      */

     public void setParameterDisplayString(String parameterDisplayString) {

         this.parameterDisplayString = parameterDisplayString;

     }

     public BusinessObjectService getBoService() {

         return KRADServiceLocator.getBusinessObjectService();

     }

 }