/**
* Returns canonical link to a bitstream in the item.
*
* @param item The DSpace Item that the bitstream is part of
* @param bitstream The bitstream to link to
* @returns a String link to the bitstream
*/
private String makeBitstreamLink(Item item, Bitstream bitstream) {
String name = bitstream.getName();
StringBuilder result = new StringBuilder(contextPath);
result.append("/bitstream/item/").append(String.valueOf(item.getID()));
// append name although it isn't strictly necessary
try {
if (name != null) {
result.append("/").append(Util.encodeBitstreamName(name, "UTF-8"));
}
} catch (UnsupportedEncodingException uee) {
// just ignore it, we don't have to have a pretty
// name on the end of the url because the sequence id will
// locate it. However it means that links in this file might
// not work....
}
result.append("?sequence=").append(String.valueOf(bitstream.getSequenceID()));
return result.toString();
}
/**
* Generate a METS file element for a given bitstream.
*
* @param context
* @param item If the bitstream is associated with an item, provide the item, otherwise leave
* null.
* @param bitstream The bitstream to build a file element for.
* @param fileID The unique file id for this file.
* @param groupID The group id for this file, if it is derived from another file then they should
* share the same groupID.
* @param admID The IDs of the administrative metadata sections which pertain to this file
* @throws org.xml.sax.SAXException passed through.
* @throws java.sql.SQLException passed through.
*/
protected final void renderFile(
Context context, Item item, Bitstream bitstream, String fileID, String groupID, String admID)
throws SAXException, SQLException {
AttributeMap attributes;
// //////////////////////////////
// Determine the file attributes
BitstreamFormat format = bitstream.getFormat(context);
String mimeType = null;
if (format != null) {
mimeType = format.getMIMEType();
}
String checksumType = bitstream.getChecksumAlgorithm();
String checksum = bitstream.getChecksum();
long size = bitstream.getSize();
// ////////////////////////////////
// Start the actual file
attributes = new AttributeMap();
attributes.put("ID", fileID);
attributes.put("GROUPID", groupID);
if (admID != null && admID.length() > 0) {
attributes.put("ADMID", admID);
}
if (mimeType != null && mimeType.length() > 0) {
attributes.put("MIMETYPE", mimeType);
}
if (checksumType != null && checksum != null) {
attributes.put("CHECKSUM", checksum);
attributes.put("CHECKSUMTYPE", checksumType);
}
attributes.put("SIZE", String.valueOf(size));
startElement(METS, "file", attributes);
// ////////////////////////////////////
// Determine the file location attributes
String name = bitstream.getName();
String description = bitstream.getDescription();
// If possible, reference this bitstream via a handle, however this may
// be null if a handle has not yet been assigned. In this case reference the
// item its internal id. In the last case where the bitstream is not associated
// with an item (such as a community logo) then reference the bitstreamID directly.
String identifier = null;
if (item != null && item.getHandle() != null) {
identifier = "handle/" + item.getHandle();
} else if (item != null) {
identifier = "item/" + item.getID();
} else {
identifier = "id/" + bitstream.getID();
}
String url = contextPath + "/bitstream/" + identifier + "/";
// If we can, append the pretty name of the bitstream to the URL
try {
if (bitstream.getName() != null) {
url += Util.encodeBitstreamName(bitstream.getName(), "UTF-8");
}
} catch (UnsupportedEncodingException uee) {
// just ignore it, we don't have to have a pretty
// name at the end of the URL because the sequence id will
// locate it. However it means that links in this file might
// not work....
}
url += "?sequence=" + bitstream.getSequenceID();
// //////////////////////
// Start the file location
attributes = new AttributeMap();
AttributeMap attributesXLINK = new AttributeMap();
attributesXLINK.setNamespace(XLINK);
attributes.put("LOCTYPE", "URL");
attributesXLINK.put("type", "locator");
attributesXLINK.put("title", name);
if (description != null) {
attributesXLINK.put("label", description);
}
attributesXLINK.put("href", url);
startElement(METS, "FLocat", attributes, attributesXLINK);
// ///////////////////////
// End file location
endElement(METS, "FLocate");
// ////////////////////////////////
// End the file
endElement(METS, "file");
}
