| Info |
|---|
As of version 1.8, this feature is now part of DSpace XMLUI and doesn't require you to make any modifications to the code. This feature was added in | Jira |
|---|
| server | DuraSpace JIRA |
|---|
| serverId | c815ca92-fd23-34c2-8fe3-956808caf8c5 |
|---|
| key | DS-749 |
|---|
|
. |
<?xml version="1.0" encoding="utf-8"?>
<html>
Background
At Leiden University, The Netherlands, we needed a way to change the order of the bitstreams as they are displayed in an easy way.
...
The order of bitstreams is defined by using the Basic + RDF + implementation. The bitstreams are semantically linked to eachother by using in "precedes" predicate. The special class BitstreamArranger manages the ordering of bitstreams.
...
Step 1: Install the Basic+RDF+implementation
See Basic + RDF + implementation for details on how to do this.
...
- add some new import statements:
| Code Block |
|---|
import java.util.ArrayList;
import nl.leidenuniv.dspace.rdf.BitstreamArranger;
import nl.leidenuniv.dspace.rdf.RDFpredicate;
import nl.leidenuniv.dspace.rdf.RDFtriple;
|
- add line of code just before "// Sort the list" near line 372
| Code Block |
|---|
BitstreamArranger arranger = BitstreamArranger.getBitstreamArranger();
|
- add lines of code inside "if (button.equals("submit_delete_bitstream_"..." block near 463 as the first statements:
| Code Block |
|---|
RDFpredicate predicate = arranger.precedesPredicate(context);
RDFtriple triple = RDFtriple.find(context,bitstream,predicate,Bitstream.class);
if (triple != null) \{
triple.delete();
\}
|
- add a new "else if" block just before the "item.update()" near 524:
| Code Block |
|---|
else if (p.equals("position"))
// && AuthorizeManager.isAdmin(context))
\{
String[] values = request.getParameterValues(p);
Bitstream[] newOrder = new Bitstream[values.length];
for (int i = 0;i<values.length;i++) \{
String v = values[i];
StringTokenizer st = new StringTokenizer(v, "_"); // should use: v.split("_")
// Ignore "position"
st.nextToken();
// Bundle ID and bitstream ID next
int bundleID = Integer.parseInt(st.nextToken());
int bitstreamID = Integer.parseInt(st.nextToken());
String newPos = st.nextToken();
//Bundle bundle = Bundle.find(context, bundleID);
Bitstream bitstream = Bitstream.find(context, bitstreamID);
String key = String.valueOf(bundleID) + "_" + bitstreamID;
if ( ! newPos.equals("N")) \{
int pos = Integer.parseInt(newPos);
if (bitstream != null && newOrder[pos] == null
&& ! button.equals("submit_delete_bitstream_"+key)) \{
newOrder[pos] = bitstream;
\}
\}
\}
int count = 0;
for (int i=0; i<newOrder.length; i++) \{
if (newOrder[i] != null) count++;
\}
Bitstream[] bitOrder = new Bitstream[count];
for (int i=0, j=0;i<newOrder.length;i++) \{
if (newOrder[i] != null) \{
bitOrder[j++] = newOrder[i];
\}
\}
arranger.orderListOfOriginalBitstreams(context,item,bitOrder);
\}
|
org/dspace/app/webui/jsptag/ItemTag.java
- add some new import statements:
| Code Block |
|---|
import org.dspace.core.Context;
import nl.leidenuniv.dspace.rdf.BitstreamArranger;
|
- replace the following code near line 632:
| Code Block |
|---|
for (int i = 0; i < bundles.length; i++)
\{
Bitstream[] bitstreams = bundles[i].getBitstreams();
for (int k = 0; k < bitstreams.length; k++)
\{
// Skip internal types
if (!bitstreams[k].getFormat().isInternal())
\{
|
with this:
| Code Block |
|---|
BitstreamArranger arranger = BitstreamArranger.getBitstreamArranger();
Context context = null;
Bitstream[] bitstreams = null;
try \{
context = UIUtil.obtainContext(request);
bitstreams = arranger.getOrderedListOfOriginalBistreams(context,item);
\}
catch (SQLException e) \{
// something wrong...
throw new IOException(e.toString());
\}
for (int k = 0; k < bitstreams.length; k++) \{
|
and do not forget to balance the number of brackets (remove 2 brackets) near line 718
...
| Code Block |
|---|
<%@ page import="nl.leidenuniv.dspace.rdf.BitstreamArranger" %>
<%@ page import="nl.leidenuniv.dspace.rdf.RDFtriple" %>
<%@ page import="nl.leidenuniv.dspace.rdf.RDFpredicate" %>
<%@ page import="java.sql.SQLException" %>
<%@ page import="org.dspace.app.webui.util.UIUtil" %>
<%@ page import="org.dspace.core.Context" %>
<%@ page import="org.dspace.content.DSpaceObject" %>
|
| Code Block |
|---|
<th id="t10" class="oddRowOddCol"> </th>
<th id="t11" class="oddRowOddCol"><strong><fmt:message key="jsp.tools.edit-item-form.elem6"/></strong></th>
|
- replace "
Bitstream) [] bitstreams = bundles(i).getBitstreams();" near line 335 with the following code:
| Code Block |
|---|
Bitstream[] bitstreams = new Bitstream[0];
boolean isOriginal = bundles[i].getName().equals("ORIGINAL");
int posKnownFrom = 0;
int posKnownTill = -1;
if (isOriginal) \{
BitstreamArranger arranger = BitstreamArranger.getBitstreamArranger();
try \{
Context context = UIUtil.obtainContext(request);
bitstreams = arranger.getOrderedListOfOriginalBistreams(context,item);
RDFpredicate predicate = arranger.initialPredicate(context);
if (bitstreams.length > 0) \{
RDFtriple triple = RDFtriple.find(context,item,predicate,Bitstream.class);
if (triple != null) \{
DSpaceObject first = triple.getObject();
for (int p=0; p<bitstreams.length; p++) \{
if (bitstreams[p].equals(first)) \{
posKnownFrom = p;
posKnownTill = p;
\}
\}
if (posKnownFrom >= 0) \{
predicate = arranger.precedesPredicate(context);
for (int p=posKnownFrom; p<bitstreams.length-1; p++) \{
triple = RDFtriple.find(context,bitstreams[p],predicate,bitstreams[p+1]);
if (triple == null) \{
break;
\}
posKnownTill++;
\}
\}
\}
\}
\}
catch (SQLException e) \{
// do nothing, maybe originals will be retrieved by getBitstreams below
\}
\}
if (bitstreams.length == 0) \{
bitstreams = bundles[i].getBitstreams();
\}
|
- replace "<% if (bundles[i].getName().equals("ORIGINAL")) {" near line 344 with the following code:
| Code Block |
|---|
<td headers="t10" class="<%= row %>RowEvenCol">
<a target="_blank" href="<%= request.getContextPath() %>/retrieve/<%= bitstreams[j].getID() %>"><fmt:message key="jsp.tools.general.view"/></a>
</td>
<% if (isOriginal)
\{ %>
<td headers="t11" class="<%= row %>RowOddCol" align="center">
<SELECT name="position" onchange="reposition(this)">
<OPTION value="position_<%= key %>_N">-</OPTION>
<% for (int k = 0; k < bitstreams.length; k++) \{ %>
<OPTION value="position_<%= key %>_<%= k %>" <% if (j>=posKnownFrom && j<=posKnownTill && (j - posKnownFrom) == k) \{ %> selected <% \} %> ><%= k+1 %></OPTION>
<% \} %>
</SELECT>
</TD>
|
- near line 353 replace "<td headers="t11"> </td>" with:
| Code Block |
|---|
<td headers="t11" class="<%= row %>RowOddCol"> </td>
<td headers="t11" class="<%= row %>RowEvenCol"> </td>
|
| Code Block |
|---|
<a target="_blank" href="<%= request.getContextPath() %>/retrieve/<%= bitstreams[j].getID() %>"><fmt:message key="jsp.tools.general.view"/></a> <input type="submit" name="submit_delete_bitstream_<%= key %>" value="<fmt:message key="jsp.tools.general.remove"/>" />
|
with this:
| Code Block |
|---|
<input type="submit" name="submit_delete_bitstream_<%= key %>" value="<fmt:message key="jsp.tools.general.remove"/>" />
|
- add some javascript just after the "</table>" near line 381 (you can also include this in a seperate file):
| Code Block |
|---|
<SCRIPT language="JavaScript">
var storedPos = new Array();
function reposition(anElement) \{
var allPosEl = document.getElementsByName('position');
var oldPos, newPos;
var indexOfEl = 0;
var hiPos = 0;
for (var i=0;i<allPosEl.length;i++) \{
if (allPosEl[i] == anElement) \{
indexOfEl = i;
\}
else \{
if (allPosEl[i].selectedIndex > hiPos) \{
hiPos = allPosEl[i].selectedIndex;
\}
\}
\}
oldPos = storedPos[indexOfEl];
newPos = anElement.selectedIndex;
if (oldPos == newPos) return;
if (newPos > hiPos + 1) \{
anElement.selectedIndex = hiPos + 1;
newPos = hiPos + 1;
\}
if (newPos == 0) \{
for (var i=0;i<allPosEl.length;i++) \{
if (allPosEl[i] != anElement) \{
var pos = allPosEl[i].selectedIndex;
if (pos > oldPos) \{
allPosEl[i].selectedIndex -= 1;
\}
\}
\}
\}
else if (oldPos == 0) \{
for (var i=0;i<allPosEl.length;i++) \{
if (allPosEl[i] != anElement) \{
var pos = allPosEl[i].selectedIndex;
if (pos >= newPos) \{
allPosEl[i].selectedIndex += 1;
\}
\}
\}
\}
else \{
for (var i=0;i<allPosEl.length;i++) \{
if (allPosEl[i] != anElement) \{
var pos = allPosEl[i].selectedIndex;
if (oldPos > newPos) \{
if (pos >= newPos && pos < oldPos) \{
allPosEl[i].selectedIndex += 1;
\}
\}
else \{
if (pos > oldPos && pos <= newPos) \{
allPosEl[i].selectedIndex -= 1;
\}
\}
\}
\}
\}
storePositions();
\}
function storePositions() \{
var allPosEl = document.getElementsByName('position');
for (var i=0;i<allPosEl.length;i++) \{
storedPos[i] = allPosEl[i].selectedIndex;
\}
\}
storePositions();
</SCRIPT>
|
...
If you need help, or have any comments, or you just want to inform me that you (are going to) use this, please contact me at schaik (at) library.leidenuniv.nl</html>