/**

  * 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.edl.impl.xml.export;

 import org.apache.log4j.Logger;

 import org.jdom.Element;

 import org.jdom.Namespace;

 import org.kuali.rice.core.api.CoreApiServiceLocator;

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

 import org.kuali.rice.core.api.style.Style;

 import org.kuali.rice.core.api.style.StyleService;

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

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

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

 import org.kuali.rice.edl.impl.bo.EDocLiteAssociation;

 import org.kuali.rice.edl.impl.bo.EDocLiteDefinition;

 import org.kuali.rice.edl.impl.service.EDocLiteService;

 import org.kuali.rice.edl.impl.service.EdlServiceLocator;

 import java.io.StringReader;

 import java.util.Iterator;

 import java.util.List;

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

 /**

  * Exports EDocLite definitions to XML.

  *

  * @see EDocLiteDefinition

  *

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

  */

 public class EDocLiteXmlExporter implements XmlExporter {

         private static final Logger LOG = Logger.getLogger(EDocLiteXmlExporter.class);

         private XmlRenderer renderer = new XmlRenderer(EDL_NAMESPACE);

         @Override

         public boolean supportPrettyPrint() {

                 return false;

         }

         public Element export(ExportDataSet exportDataSet) {

                 EdlExportDataSet dataSet = EdlExportDataSet.fromExportDataSet(exportDataSet);

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

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

                         rootElement.setAttribute(SCHEMA_LOCATION_ATTR, EDL_SCHEMA_LOCATION, SCHEMA_NAMESPACE);

                         // create output in order of all edl followed by all stylesheets, followed by all associations, this is so multiple edoclite's can be ingested in a single xml file.

                         List<EDocLiteAssociation> assocList = dataSet.getEdocLites();

                         // loop thru same list 3 times.

                         for (EDocLiteAssociation e : assocList) {

                                 exportEdlDefinitions(rootElement, e);

                         }

                         for (EDocLiteAssociation e : assocList) {

                                 exportStyles(rootElement, e);

                         }

                         for (EDocLiteAssociation e : assocList) {

                                 exportAssociations(rootElement, e);

                         }

                         return rootElement;

                 }

                 return null;

         }

         private void exportEdlDefinitions(Element parentEl, EDocLiteAssociation edl) {

                 try {

                         EDocLiteService edlService = EdlServiceLocator.getEDocLiteService();

                         if (edl.getDefinition() != null) {  //this probably shouldn't be supported on the entry side...

                                 EDocLiteDefinition def = edlService.getEDocLiteDefinition(edl.getDefinition());

                                 if (def == null) {

                                         LOG.error("Attempted to export definition " + edl.getDefinition() + " which was not found");

                                         return;

                                 }

                                 Element defEl = XmlHelper.buildJDocument(new StringReader(def.getXmlContent())).getRootElement();

                                 setNamespace(defEl, EDL_NAMESPACE);

                                 parentEl.addContent(defEl.detach());

                         }

                 } catch (Exception e) {

                         throw new RuntimeException(e);

                 }

         }

         private void exportStyles(Element parentEl, EDocLiteAssociation edl) {

                 try {

                         StyleService styleService = CoreApiServiceLocator.getStyleService();

                         if (edl.getStyle() != null) {//this probably shouldn't be supported on the entry side...

                                 Element styleWrapperEl = renderer.renderElement(parentEl, EDL_STYLE);

                                 renderer.renderAttribute(styleWrapperEl, "name", edl.getStyle());

                                 Style style = styleService.getStyle(edl.getStyle());

                                 if (style == null) {

                                         LOG.error("Attempted to export style " + edl.getStyle() + " which was not found");

                                         return;

                                 }

                                 Element styleEl = XmlHelper.buildJDocument(new StringReader(style.getXmlContent())).getRootElement();

                                 styleWrapperEl.addContent(styleEl.detach());

                         }

                 } catch (Exception e) {

                         throw new RuntimeException(e);

                 }

         }

         private void exportAssociations(Element parentEl, EDocLiteAssociation edl) {

                 try {

                         Element associationEl = renderer.renderElement(parentEl, EDL_ASSOCIATION);

                         renderer.renderTextElement(associationEl, EDL_DOC_TYPE, edl.getEdlName());

                         if (edl.getDefinition() != null) {

                                 renderer.renderTextElement(associationEl, EDL_DEFINITION, edl.getDefinition());

                         }

                         if (edl.getStyle() != null) {

                                 renderer.renderTextElement(associationEl, EDL_STYLE, edl.getStyle());

                         }

                         renderer.renderTextElement(associationEl, EDL_ACTIVE, edl.getActiveInd().toString());

                 } catch (Exception e) {

                         throw new RuntimeException(e);

                 }

         }

         private void setNamespace(Element element, Namespace namespace) {

                 element.setNamespace(namespace);

                 for (Iterator iter = element.getChildren().iterator(); iter.hasNext();) {

                         setNamespace((Element)iter.next(), namespace);

                 }

         }

 }