/**
* 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.content.crosswalk;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.lang.ArrayUtils;
import org.dspace.authorize.AuthorizeException;
import org.dspace.content.*;
import org.dspace.content.factory.ContentServiceFactory;
import org.dspace.content.service.ItemService;
import org.dspace.core.Constants;
import org.dspace.core.Context;
import org.jdom.Element;
import org.jdom.Namespace;
/**
* DIM dissemination crosswalk
* <p>
* Produces the metadata encoded in DSpace Intermediate Format, without the overhead of XSLT processing.
*
* @author Alexey Maslov
* @version $Revision: 1 $
*/
public class DIMDisseminationCrosswalk
implements DisseminationCrosswalk
{
// Non-existant XSD schema
public static final String DIM_XSD = "null";
// Namespaces
public static final Namespace DIM_NS =
Namespace.getNamespace("dim", "http://www.dspace.org/xmlns/dspace/dim");
protected final ItemService itemService = ContentServiceFactory.getInstance().getItemService();
private static final Namespace namespaces[] = { DIM_NS };
@Override
public Namespace[] getNamespaces()
{
return (Namespace[]) ArrayUtils.clone(namespaces);
}
/* No schema for DIM */
@Override
public String getSchemaLocation()
{
return DIM_NS.getURI() + " " + DIM_XSD;
}
@Override
public Element disseminateElement(Context context, DSpaceObject dso) throws CrosswalkException, IOException, SQLException, AuthorizeException
{
if (dso.getType() != Constants.ITEM)
{
throw new CrosswalkObjectNotSupported("DIMDisseminationCrosswalk can only crosswalk an Item.");
}
Item item = (Item)dso;
List<MetadataValue> dc = itemService.getMetadata(item, Item.ANY, Item.ANY, Item.ANY, Item.ANY);
Element dim = new Element("dim", DIM_NS);
for (MetadataValue aDc : dc)
{
MetadataField metadataField = aDc.getMetadataField();
MetadataSchema metadataSchema = metadataField.getMetadataSchema();
Element field = new Element("field", DIM_NS);
field.setAttribute("mdschema", metadataSchema.getName());
field.setAttribute("element", metadataField.getElement());
if (metadataField.getQualifier() != null) {
field.setAttribute("qualifier", metadataField.getQualifier());
}
if (aDc.getLanguage() != null) {
field.setAttribute("lang", aDc.getLanguage());
}
if (aDc.getValue() != null) {
field.setText(aDc.getValue());
}
dim.addContent(field);
}
return dim;
}
@Override
public List<Element> disseminateList(Context context, DSpaceObject dso) throws CrosswalkException, IOException, SQLException, AuthorizeException
{
List<Element> result = new ArrayList<Element>(1);
result.add(disseminateElement(context, dso));
return result;
}
/* Only interested in disseminating items at this time */
@Override
public boolean canDisseminate(DSpaceObject dso)
{
return (dso.getType() == Constants.ITEM);
}
@Override
public boolean preferList()
{
return false;
}
}