/**

  * 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.kew.xml.export;

 import org.jdom.Element;

 import org.kuali.rice.core.api.exception.RiceRuntimeException;

 import org.kuali.rice.core.api.impex.ExportDataSet;

 import org.kuali.rice.core.api.util.xml.XmlRenderer;

 import org.kuali.rice.core.framework.impex.xml.XmlExporter;

 import org.kuali.rice.kew.export.KewExportDataSet;

 import org.kuali.rice.kew.rule.RuleBaseValues;

 import org.kuali.rice.kew.rule.RuleDelegationBo;

 import org.kuali.rice.kew.rule.RuleResponsibilityBo;

 import org.kuali.rice.kew.service.KEWServiceLocator;

 import org.kuali.rice.kim.api.group.Group;

 import org.kuali.rice.kim.api.identity.principal.Principal;

 import java.util.Iterator;

 import static org.kuali.rice.core.api.impex.xml.XmlConstants.*;

 /**

  * Exports rules to XML.

  *

  * @see RuleBaseValues

  *

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

  */

 public class RuleDelegationXmlExporter implements XmlExporter {

     protected final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(getClass());

     private XmlRenderer renderer = new XmlRenderer(RULE_NAMESPACE);

     private RuleXmlExporter ruleExporter = new RuleXmlExporter(RULE_NAMESPACE);

         @Override

         public boolean supportPrettyPrint() {

                 return true;

         }

     public Element export(ExportDataSet exportDataSet) {

             KewExportDataSet dataSet = KewExportDataSet.fromExportDataSet(exportDataSet);

         if (!dataSet.getRuleDelegations().isEmpty()) {

             Element rootElement = renderer.renderElement(null, RULE_DELEGATIONS);

             rootElement.setAttribute(SCHEMA_LOCATION_ATTR, RULE_SCHEMA_LOCATION, SCHEMA_NAMESPACE);

             for (Iterator iterator = dataSet.getRuleDelegations().iterator(); iterator.hasNext();) {

                 RuleDelegationBo ruleDelegation = (RuleDelegationBo) iterator.next();

                 exportRuleDelegation(rootElement, ruleDelegation);

             }

             return rootElement;

         }

         return null;

     }

     private void exportRuleDelegation(Element parent, RuleDelegationBo ruleDelegation) {

             Element ruleDelegationElement = renderer.renderElement(parent, RULE_DELEGATION);

             exportParentResponsibility(ruleDelegationElement, ruleDelegation);

             renderer.renderTextElement(ruleDelegationElement, DELEGATION_TYPE, ruleDelegation.getDelegationType().getCode());

             ruleExporter.exportRule(ruleDelegationElement, ruleDelegation.getDelegationRule());

     }

     private void exportParentResponsibility(Element parent, RuleDelegationBo delegation) {

         Element parentResponsibilityElement = renderer.renderElement(parent, PARENT_RESPONSIBILITY);

         RuleResponsibilityBo ruleResponsibility = KEWServiceLocator.getRuleService().findRuleResponsibility(delegation.getResponsibilityId());

         renderer.renderTextElement(parentResponsibilityElement, PARENT_RULE_NAME, ruleResponsibility.getRuleBaseValues().getName());

         if (ruleResponsibility.isUsingPrincipal()) {

                 Principal principal = ruleResponsibility.getPrincipal();

                 renderer.renderTextElement(parentResponsibilityElement, PRINCIPAL_NAME, principal.getPrincipalName());

         } else if (ruleResponsibility.isUsingGroup()) {

                 Group group = ruleResponsibility.getGroup();

                 Element groupElement = renderer.renderElement(parentResponsibilityElement, GROUP_NAME);

                 groupElement.setText(group.getName());

                 groupElement.setAttribute(NAMESPACE, group.getNamespaceCode());

         } else if (ruleResponsibility.isUsingRole()) {

                 renderer.renderTextElement(parentResponsibilityElement, ROLE, ruleResponsibility.getRuleResponsibilityName());

         } else {

                 throw new RiceRuntimeException("Encountered a rule responsibility when exporting with an invalid type of '" + ruleResponsibility.getRuleResponsibilityType());

         }

     }

 }