/*

  * Copyright 2007-2008 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.rice.kns.workflow.attribute;

 import org.w3c.dom.Element;

 /**

  * This is an XML KEW search attribute that can be used where the XML of the attribute has an xpath expression that returns a

  * boolean. This attribute takes that boolean expression and translates it into true and false values based on the

  * {@link #getValueForXPathTrueEvaluation()} and {@link #getValueForXPathFalseEvaluation()} method's return variables.

  * 

  * NOTE: This will not longer be necessary if the version of xPath being used is every upgrade to 2.x or higher

  */

 public class KualiXMLBooleanTranslatorSearchableAttributeImpl extends KualiXmlSearchableAttributeImpl {

         private static final long serialVersionUID = -4627314389844574461L;

         public static final String VALUE_FOR_TRUE = "Yes";

         public static final String VALUE_FOR_FALSE = "No";

         /**

          * This overriden method does the translation of the given xPath expression from the XML definition of the attribute and

          * translates it into the true and false values based on the {@link #getValueForXPathTrueEvaluation()} and

          * {@link #getValueForXPathFalseEvaluation()} method's return variables

          * 

          * @see org.kuali.rice.kns.workflow.attribute.KualiXmlSearchableAttributeImpl#getConfigXML()

          */

         @Override

         public Element getConfigXML() {

                 String[] xpathElementsToInsert = new String[3];

                 xpathElementsToInsert[0] = "concat( substring('" + getValueForXPathTrueEvaluation() + "', number(not(";

                 xpathElementsToInsert[1] = "))*string-length('" + getValueForXPathTrueEvaluation() + "')+1), substring('" + getValueForXPathFalseEvaluation() + "', number(";

                 xpathElementsToInsert[2] = ")*string-length('" + getValueForXPathFalseEvaluation() + "')+1))";

                 Element root = super.getAttributeConfigXML();

                 return new KualiXmlAttributeHelper().processConfigXML(root, xpathElementsToInsert);

         }

         public String getValueForXPathTrueEvaluation() {

                 return VALUE_FOR_TRUE;

         }

         public String getValueForXPathFalseEvaluation() {

                 return VALUE_FOR_FALSE;

         }

 }