/*

  * Copyright 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/ecl1.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.kim.impl.jaxb;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.OutputStream;

 import java.util.Collections;

 import java.util.List;

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

 import org.kuali.rice.kim.api.permission.PermissionContract;

 import org.kuali.rice.kim.api.role.RoleContract;

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

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

 import org.kuali.rice.krad.util.KRADConstants;

 /**

  * Imports and exports roles and permissions from/to XML via JAXB.

  * 

  * <p>TODO: Do we need to restrict XML additions or updates based on which user is performing the ingestion?

  * 

  * <p>TODO: It may be best to make this class into a "service" instead.

  * 

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

  */

 public class KimImporterAndExporter implements XmlLoader, Exporter {

     private final List<String> supportedFormats = Collections.singletonList(KRADConstants.XML_FORMAT);

     /**

      * @see org.kuali.rice.core.framework.impex.xml.XmlLoader#loadXml(java.io.InputStream, java.lang.String)

      */

     @Override

     public void loadXml(InputStream inputStream, String principalId) {

         KimXmlUtil.parseKimXml(inputStream);

     }

     /**

      * @see org.kuali.rice.krad.bo.Exporter#export(java.lang.Class, java.util.List, java.lang.String, java.io.OutputStream)

      */

     @Override

     public void export(Class<?> dataObjectClass, List<? extends Object> dataObjects, String exportFormat,

             OutputStream outputStream) throws IOException, ExportNotSupportedException {

         if (!supportedFormats.contains(exportFormat)) {

             throw new ExportNotSupportedException("The KimImporterAndExporter does not support the \"" + exportFormat + "\" export format");

         }

         if (PermissionContract.class.isAssignableFrom(dataObjectClass)) {

             KimXmlUtil.exportKimXml(outputStream, dataObjects, null);

         } else if (RoleContract.class.isAssignableFrom(dataObjectClass)) {

             KimXmlUtil.exportKimXml(outputStream, null, dataObjects);

         } else {

             throw new ExportNotSupportedException("The KimImporterAndExporter cannot export non-permission and non-role objects");

         }

     }

     /**

      * @see org.kuali.rice.krad.bo.Exporter#getSupportedFormats(java.lang.Class)

      */

     @Override

     public List<String> getSupportedFormats(Class<?> dataObjectClass) {

         return supportedFormats;

     }

 }