/**
* The contents of this file are subject to the license and copyright
* detailed in the LICENSE and NOTICE files at the root of the source
* tree and available online at
*
* http://www.dspace.org/license/
*/
package org.dspace.app.webui.servlet.admin;
import java.io.IOException;
import java.sql.SQLException;
import java.util.Locale;
import java.util.ResourceBundle;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
import org.dspace.app.webui.servlet.DSpaceServlet;
import org.dspace.app.webui.util.JSPManager;
import org.dspace.app.webui.util.UIUtil;
import org.dspace.authorize.AuthorizeException;
import org.dspace.content.MetadataSchema;
import org.dspace.content.NonUniqueMetadataException;
import org.dspace.core.Context;
/**
* Servlet for editing the Dublin Core schema registry.
*
* @author Martin Hald
* @version $Revision$
*/
public class MetadataSchemaRegistryServlet extends DSpaceServlet
{
/** Logger */
private static Logger log = Logger.getLogger(MetadataSchemaRegistryServlet.class);
private String clazz = "org.dspace.app.webui.servlet.admin.MetadataSchemaRegistryServlet";
protected void doDSGet(Context context, HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException,
SQLException, AuthorizeException
{
// GET just displays the list of type
showSchemas(context, request, response);
}
protected void doDSPost(Context context, HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException,
SQLException, AuthorizeException
{
String button = UIUtil.getSubmitButton(request, "submit");
if (button.equals("submit_add"))
{
// We are either going to create a new dc schema or update and
// existing one depending on if a schema_id was passed in
String id = request.getParameter("dc_schema_id");
// The sanity check will update the request error string if needed
if (!sanityCheck(request))
{
showSchemas(context, request, response);
context.abort();
return;
}
try
{
if (id.equals(""))
{
// Create a new metadata schema
MetadataSchema schema = new MetadataSchema();
schema.setNamespace(request.getParameter("namespace"));
schema.setName(request.getParameter("short_name"));
schema.create(context);
showSchemas(context, request, response);
context.complete();
}
else
{
// Update an existing schema
MetadataSchema schema = MetadataSchema.find(context,
UIUtil.getIntParameter(request, "dc_schema_id"));
schema.setNamespace(request.getParameter("namespace"));
schema.setName(request.getParameter("short_name"));
schema.update(context);
showSchemas(context, request, response);
context.complete();
}
}
catch (NonUniqueMetadataException e)
{
request.setAttribute("error",
"Please make the namespace and short name unique.");
showSchemas(context, request, response);
context.abort();
return;
}
}
else if (button.equals("submit_delete"))
{
// Start delete process - go through verification step
MetadataSchema schema = MetadataSchema.find(context, UIUtil
.getIntParameter(request, "dc_schema_id"));
request.setAttribute("schema", schema);
JSPManager.showJSP(request, response,
"/dspace-admin/confirm-delete-mdschema.jsp");
}
else if (button.equals("submit_confirm_delete"))
{
// User confirms deletion of type
MetadataSchema dc = MetadataSchema.find(context, UIUtil
.getIntParameter(request, "dc_schema_id"));
dc.delete(context);
showSchemas(context, request, response);
context.complete();
}
else
{
// Cancel etc. pressed - show list again
showSchemas(context, request, response);
}
}
/**
* Return false if the schema arguments fail to pass the constraints. If
* there is an error the request error String will be updated with an error
* description.
*
* @param request
* @return true of false
*/
private boolean sanityCheck(HttpServletRequest request)
{
Locale locale = request.getLocale();
ResourceBundle labels =
ResourceBundle.getBundle("Messages", locale);
// TODO: add more namespace checks
String namespace = request.getParameter("namespace");
if (namespace.length() == 0)
{
return error(request, labels.getString(clazz + ".emptynamespace"));
}
String name = request.getParameter("short_name");
if (name.length() == 0)
{
return error(request, labels.getString(clazz + ".emptyname"));
}
if (name.length() > 32)
{
return error(request, labels.getString(clazz + ".nametolong"));
}
for (int ii = 0; ii < name.length(); ii++)
{
if (name.charAt(ii) == ' ' || name.charAt(ii) == '_'
|| name.charAt(ii) == '.')
{
return error(request,
labels.getString(clazz + ".illegalchar"));
}
}
return true;
}
/**
* Bind the error text to the request object.
*
* @param request
* @param text
* @return false
*/
private boolean error(HttpServletRequest request, String text)
{
request.setAttribute("error", text);
return false;
}
/**
* Show list of DC type
*
* @param context
* Current DSpace context
* @param request
* Current HTTP request
* @param response
* Current HTTP response
* @throws ServletException
* @throws IOException
* @throws SQLException
* @throws IOException
*/
private void showSchemas(Context context, HttpServletRequest request,
HttpServletResponse response) throws ServletException,
SQLException, IOException
{
MetadataSchema[] schemas = MetadataSchema.findAll(context);
request.setAttribute("schemas", schemas);
log.info("Showing Schemas");
JSPManager.showJSP(request, response,
"/dspace-admin/list-metadata-schemas.jsp");
}
}