private void init() throws IOException {
// Make sure its there
if (scormSettingsHandler.getManifestFile().exists()) {
try {
_navViewer = new NavigationViewer(scormSettingsHandler);
} catch (IOException e) {
throw e;
} catch (JDOMParseException e) {
throw new IOException("Parse exception", e);
} catch (Exception ex) {
throw new OLATRuntimeException(ScormManager.class, "Could not load manifest", ex);
}
// Package Links - use a clone so we can add referenced elements
Element manifestRoot = (Element) _navViewer.getRootElement().clone();
// now get the organizations node
Element orgs = manifestRoot.getChild(CP_Core.ORGANIZATIONS, manifestRoot.getNamespace());
Element[] tmp = _navViewer.getOrganizationList();
organizationElements = new LinkedList();
for (int i = 0; i < tmp.length; ++i) {
organizationElements.add(tmp[i]);
}
// remember the default organization
_defaultorg = _navViewer.getDefaultOrgElement(orgs);
// NO orgs, so cant play - flag it
if (_defaultorg == null) {
_ReloadNoItemFoundExceptionFlag = false;
} else {
_sequence =
new SequenceManager(
_defaultorg.getAttributeValue(CP_Core.IDENTIFIER), scormSettingsHandler);
// it exists so try to load it...
try {
initialize();
} catch (Exception ex) {
_error_found = true;
throw new OLATRuntimeException(ScormManager.class, "Could not initialise manifest", ex);
}
} //
} else {
// problems if we cannot find the nav file...
_error_found = true;
}
}
/**
* Recursive method to find all of the javascript strings (item info) and populate the sequencer
*
* @param javascriptStrings
* @param element
* @param menuParent
* @param useRelativePaths
*/
protected void createNavLinks(
Vector javascriptStrings, Element element, String menuParent, boolean useRelativePaths) {
String name = element.getName();
// ORGANIZATION
if (name.equals(CP_Core.ORGANIZATION) && _navViewer.isDocumentNamespace(element)) {
++_orgCount;
String orgId = element.getAttributeValue(CP_Core.IDENTIFIER);
menuParent = "menu";
String title = "Organization";
// Display Title if there is one
Element titleElement = element.getChild(CP_Core.TITLE, element.getNamespace());
if (titleElement != null) {
if (!titleElement.getText().equals("")) title = titleElement.getText();
}
// find out if this the default organization...
String _defaultOrganization = _defaultorg.getAttributeValue(CP_Core.IDENTIFIER);
if (_defaultOrganization != null) {
if (_defaultOrganization.equals(orgId)) {
writePackageSettings(javascriptStrings, "_defaultOrg", _orgCount);
}
}
writeOrganization(javascriptStrings, title, orgId);
}
// ITEM
else if (name.equals(CP_Core.ITEM) && _navViewer.isDocumentNamespace(element)) {
++_itemCount;
String itemId = element.getAttributeValue(CP_Core.IDENTIFIER);
String hyperLink = "";
String url = "";
String scoType = "";
// Display Title if there is one
String title = "Item";
Element titleElement = element.getChild(CP_Core.TITLE, element.getNamespace());
if (titleElement != null) {
if (!titleElement.getText().equals("")) title = titleElement.getText();
}
// check to see that the isvisible attribute is not set to false...
String isVisibleAttrib = element.getAttributeValue(CP_Core.ISVISIBLE);
if (isVisibleAttrib != null) {
if (isVisibleAttrib.equals("false")) {
title = "* hidden";
}
}
// What does this Item reference?
Element ref_element = _navViewer.getScormCore().getReferencedElement(element);
String prerequisites = "";
if (ref_element != null) {
String ref_name = ref_element.getName();
// A RESOURCE
if (ref_name.equals(CP_Core.RESOURCE)) {
scoType = _navViewer.findScoType(element);
// Relative path for export - Note the "../" is relative to where the
// Nav file is!
if (useRelativePaths) {
url = _navViewer.getScormCore().getRelativeURL(element);
// Only if local path add relative bit
if (isExternalURL(url) == false) {
url = "../" + url;
}
}
// Absolute Paths for Previewing in-situ
else {
String turl = _navViewer.getLaunch(element);
url = turl;
}
if (url != null) {
hyperLink = url;
if (!title.equals("* hidden")) {
prerequisites = _navViewer.getPrerequisites(element);
if (prerequisites == null) {
prerequisites = "";
}
}
}
}
// A sub-MANIFEST
else if (ref_name.equals(CP_Core.MANIFEST)) {
hyperLink = "javascript:void(0)";
// Get ORGANIZATIONS Element
Element orgsElement =
ref_element.getChild(CP_Core.ORGANIZATIONS, ref_element.getNamespace());
// Now we have to get the default ORGANIZATION
if (orgsElement != null)
ref_element = _navViewer.getScormCore().getDefaultOrganization(orgsElement);
// Get the children of the referenced <organization> element and graft
// clones
if (ref_element != null) {
Iterator it = ref_element.getChildren().iterator();
while (it.hasNext()) {
Element ref_child = (Element) it.next();
element.addContent((Element) ref_child.clone());
}
}
}
} else {
hyperLink = "javascript:void(0)";
}
// System.out.println("adding to sequencer:"+ itemId + " " + hyperLink+ "
// " + _itemCount+ " " + scoType+ " " +title+ " " + prerequisites);
_sequence.addNewItem(itemId, hyperLink, _itemCount, scoType, title, prerequisites);
writeItem(javascriptStrings, title, hyperLink, itemId, menuParent);
menuParent = itemId;
}
// round we go again...
Iterator it = element.getChildren().iterator();
while (it.hasNext()) {
Element child = (Element) it.next();
createNavLinks(javascriptStrings, child, menuParent, useRelativePaths);
}
}
public int getNumOfSCOs() {
return _navViewer.getAllScoIdentifiers().length;
}
public String[] getAllScoIdentifiers() {
return _navViewer.getAllScoIdentifiers();
}
/**
* A method to do some initialising before we actually play the package. Here we get the default
* organization and then pass that to a method which will parse that organization (JDOM) and
* figure out what we need, in terms of items, sequence, prerequisites, etc
*/
public void initialize() {
if (_navViewer.getDocument() == null) {
return;
}
_javascriptStrings = parse(false);
}
