/*

  * 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.core.impl.style;

 import java.io.IOException;

 import java.io.OutputStream;

 import java.util.ArrayList;

 import java.util.List;

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

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

 import org.kuali.rice.kns.bo.BusinessObject;

 import org.kuali.rice.kns.bo.Exporter;

 import org.kuali.rice.kns.exception.ExportNotSupportedException;

 import org.kuali.rice.kns.util.KNSConstants;

 /**

  * An implementation of the {@link Exporter} class which facilitates exporting

  * of {@link StyleBo} data from the GUI.

  * 

  * @see ExportDataSet

  * @see StyleBo

  *

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

  */

 public class StyleDataExporter implements Exporter {

         private List<String> supportedFormats = new ArrayList<String>();

         public StyleDataExporter() {

                 supportedFormats.add(KNSConstants.XML_FORMAT);

         }

         @Override

         public void export(Class<? extends BusinessObject> businessObjectClass, List<BusinessObject> businessObjects, String exportFormat, OutputStream outputStream) throws IOException {

                 if (!KNSConstants.XML_FORMAT.equals(exportFormat)) {

                         throw new ExportNotSupportedException("The given export format of " + exportFormat + " is not supported by the KEW XML Exporter!");

                 }

                 ExportDataSet dataSet = buildExportDataSet(businessObjectClass, businessObjects);

                 outputStream.write(CoreApiServiceLocator.getXmlExporterService().export(dataSet));

                 outputStream.flush();

         }

         @Override

         public List<String> getSupportedFormats(Class<? extends BusinessObject> businessObjectClass) {

                 return supportedFormats;

         }

         /**

          * Builds the ExportDataSet based on the BusinessObjects passed in.

          */

         protected ExportDataSet buildExportDataSet(Class<? extends BusinessObject> businessObjectClass, List<BusinessObject> businessObjects) {

                 StyleExportDataSet dataSet = new StyleExportDataSet();

                 for (BusinessObject businessObject : businessObjects) {

                         if (businessObjectClass.equals(StyleBo.class)) {

                                 dataSet.getStyles().add((StyleBo)businessObject);

                         }    

                 }

                 return dataSet.createExportDataSet();

         }

 }