org.dom4j.XPath Java Examples

private String convertFlag(final Document doc) {
	XPath flagSelector = DocumentHelper.createXPath("/settings/flags/flag");
	List<?> flagResults = flagSelector.selectNodes(doc);
	boolean text = false;
	boolean window = false;
	for (Iterator<?> iter = flagResults.iterator(); iter.hasNext();) {
		Element element = (Element) iter.next();
		Attribute key = element.attribute("key");
		Attribute visible = element.attribute("enabled");
		if (key.getText().equals("FLAG_AUTO_RESIZE_COLUMNS_TEXT")) {
			text = visible.getText().equals("true");
			element.detach();
		}
		if (key.getText().equals("FLAG_AUTO_RESIZE_COLUMNS_WINDOW")) {
			window = visible.getText().equals("true");
			element.detach();
		}
	}
	if (text) {
		return "TEXT";
	}
	if (window) {
		return "WINDOW";
	}
	return "NONE";
}
 

@SuppressWarnings( "unchecked" )
private boolean applyXPath() {
  try {
    XPath xpath = data.document.createXPath( data.PathValue );
    if ( meta.isNamespaceAware() ) {
      xpath = data.document.createXPath( addNSPrefix( data.PathValue, data.PathValue ) );
      xpath.setNamespaceURIs( data.NAMESPACE );
    }
    // get nodes list
    data.an = xpath.selectNodes( data.document );
    data.nodesize = data.an.size();
    data.nodenr = 0;
  } catch ( Exception e ) {
    logError( BaseMessages.getString( PKG, "GetXMLData.Log.ErrorApplyXPath", e.getMessage() ) );
    return false;
  }
  return true;
}
 

@SuppressWarnings( "unchecked" )
private boolean applyXPath() {
  try {
    XPath xpath = data.document.createXPath( data.PathValue );
    if ( meta.isNamespaceAware() ) {
      xpath = data.document.createXPath( addNSPrefix( data.PathValue, data.PathValue ) );
      xpath.setNamespaceURIs( data.NAMESPACE );
    }
    // get nodes list
    data.an = xpath.selectNodes( data.document );
    data.nodesize = data.an.size();
    data.nodenr = 0;
  } catch ( Exception e ) {
    logError( BaseMessages.getString( PKG, "GetXMLData.Log.ErrorApplyXPath", e.getMessage() ) );
    return false;
  }
  return true;
}
 

private void convertTableSettings(final Document doc) {
	XPath xpathSelector = DocumentHelper.createXPath("/settings/columns/column");
	List<?> results = xpathSelector.selectNodes(doc);
	List<String> tableColumnNames = new ArrayList<String>();
	List<String> tableColumnVisible = new ArrayList<String>();
	for (Iterator<?> iter = results.iterator(); iter.hasNext();) {
		Element element = (Element) iter.next();
		Attribute name = element.attribute("name");
		Attribute visible = element.attribute("visible");
		tableColumnNames.add(name.getText());
		if (visible.getText().equals("true")) {
			tableColumnVisible.add(name.getText());
		}
	}
	String mode = convertFlag(doc);
	writeTableSettings(doc, mode, tableColumnNames, tableColumnVisible);
}
 

private XPath makeFaceNeighbourXPath(int edgeID, int faceID) {
    String path = FACE_NEIGHBOUR_XPATH_STRING.replace("$edgeid", String.valueOf(edgeID)).replace("$faceid", String.valueOf(faceID));
    //        Logger.debug("Neighbour XPath: " + path);
    XPath result = DocumentHelper.createXPath(path);
    result.setNamespaceURIs(URIS);
    return result;
}
 

private GenericTreeNode buildNode(final Element item) {
    final GenericTreeNode gtn = new GenericTreeNode();

    // extract title
    String title = item.elementText("title");
    if (title == null) {
        title = item.attributeValue("identifier");
    }
    gtn.setAltText(title);
    gtn.setTitle(title);

    if (item.getName().equals("organization")) {
        gtn.setIconCssClass("o_cp_org");
        gtn.setAccessible(false);
    } else if (item.getName().equals("item")) {
        gtn.setIconCssClass("o_cp_item");
        // set resolved file path directly
        final String identifierref = item.attributeValue("identifierref");
        final XPath meta = rootElement.createXPath("//ns:resource[@identifier='" + identifierref + "']");
        meta.setNamespaceURIs(nsuris);
        final String href = (String) resources.get(identifierref);
        if (href != null) {
            gtn.setUserObject(href);
            // allow lookup of a treenode given a href so we can quickly adjust the menu if the user clicks on hyperlinks within the text
            hrefToTreeNode.put(href, gtn);
        } else {
            gtn.setAccessible(false);
        }
    }

    final List chds = item.elements("item");
    final int childcnt = chds.size();
    for (int i = 0; i < childcnt; i++) {
        final Element childitem = (Element) chds.get(i);
        final GenericTreeNode gtnchild = buildNode(childitem);
        gtn.addChild(gtnchild);
    }
    return gtn;
}
 

private GenericTreeNode buildNode(final Element item) {
    final GenericTreeNode gtn = new GenericTreeNode();

    // extract title
    String title = item.elementText("title");
    if (title == null) {
        title = item.attributeValue("identifier");
    }
    gtn.setAltText(title);
    gtn.setTitle(title);

    if (item.getName().equals("organization")) {
        gtn.setIconCssClass("o_cp_org");
        gtn.setAccessible(false);
    } else if (item.getName().equals("item")) {
        gtn.setIconCssClass("o_cp_item");
        // set resolved file path directly
        final String identifierref = item.attributeValue("identifierref");
        final XPath meta = rootElement.createXPath("//ns:resource[@identifier='" + identifierref + "']");
        meta.setNamespaceURIs(nsuris);
        final String href = (String) resources.get(identifierref);
        if (href != null) {
            gtn.setUserObject(href);
            // allow lookup of a treenode given a href so we can quickly adjust the menu if the user clicks on hyperlinks within the text
            hrefToTreeNode.put(href, gtn);
        } else {
            gtn.setAccessible(false);
        }
    }

    final List chds = item.elements("item");
    final int childcnt = chds.size();
    for (int i = 0; i < childcnt; i++) {
        final Element childitem = (Element) chds.get(i);
        final GenericTreeNode gtnchild = buildNode(childitem);
        gtn.addChild(gtnchild);
    }
    return gtn;
}
 

private void convertDefaultPriceModes(final Document doc) {
	XPath xpathSelector = DocumentHelper.createXPath("/settings/marketstat");
	List<?> results = xpathSelector.selectNodes(doc);
	for (Iterator<?> iter = results.iterator(); iter.hasNext();) {
		Element elem = (Element) iter.next();
		Attribute attr = elem.attribute("defaultprice");
		if (attr != null) { //May not exist (in early versions)
			String currentValue = attr.getText();
			attr.setText(convertDefaultPriceMode(currentValue));
		}
	}
}
 

private void convertModes(final Document doc) {
	XPath xpathSelector = DocumentHelper.createXPath("/settings/filters/filter/row");
	List<?> results = xpathSelector.selectNodes(doc);
	for (Iterator<?> iter = results.iterator(); iter.hasNext();) {
		Element elem = (Element) iter.next();
		Attribute attr = elem.attribute("mode");
		String currentValue = attr.getText();
		attr.setText(convertMode(currentValue));
	}
}
 

private Pair<List<GMLDirectedEdge>, List<Integer>> readEdges(Element e, GMLMap map, int faceID) {
    List<GMLDirectedEdge> edges = new ArrayList<GMLDirectedEdge>();
    List<Integer> neighbours = new ArrayList<Integer>();

    //        Logger.debug("Reading edges for face " + faceID);
    for (Object next : e.elements(Common.GML_DIRECTED_EDGE_QNAME)) {
        Element dEdge = (Element)next;
        boolean passable = "+".equals(dEdge.attributeValue(Common.GML_ORIENTATION_QNAME));
        int edgeID = Integer.parseInt(dEdge.attributeValue(Common.XLINK_HREF_QNAME).substring(1));
        //            Logger.debug("Edge ID: " + edgeID);
        //            Logger.debug("Passable? " + passable);
        edges.add(new GMLDirectedEdge(map.getEdge(edgeID), true));
        XPath xpath = makeFaceNeighbourXPath(edgeID, faceID);
        //            FACE_NEIGHBOUR_XPATH_CONTEXT.setVariableValue("edgeid", String.valueOf(edgeID));
        //            FACE_NEIGHBOUR_XPATH_CONTEXT.setVariableValue("faceid", String.valueOf(faceID));
        Object o = xpath.evaluate(e);
        //            Logger.debug("Neighbours: " + o);
        if (o == null) {
            neighbours.add(null);
        }
        else if (o instanceof Collection && ((Collection)o).isEmpty()) {
            neighbours.add(null);
        }
        else {
            int neighbourID = Integer.parseInt(((Attribute)o).getValue().substring(1));
            neighbours.add(neighbourID);
        }
        //            Logger.debug("Edge list     : " + edges);
        //            Logger.debug("Neighbour list: " + neighbours);
    }
    //        Logger.debug("Finished reading edges for face " + faceID);
    return new Pair<List<GMLDirectedEdge>, List<Integer>>(edges, neighbours);
}
 

public XPath createXPath(String xpath) throws InvalidXPathException {
	return target().createXPath( xpath );
}
 

@Override
protected void writeResponse(InputStream input, OutputStream output)
    throws IOException
{
    if (response.getContentType().startsWith(MimetypeMap.MIMETYPE_ATOM) ||
        response.getContentType().startsWith(MimetypeMap.MIMETYPE_RSS))
    {
        // Only post-process ATOM and RSS feeds
        // Replace all navigation links with "proxied" versions
        SAXReader reader = new SAXReader();
        try
        {
            Document document = reader.read(input);
            Element rootElement = document.getRootElement();

            XPath xpath = rootElement.createXPath(ATOM_LINK_XPATH);
            Map<String,String> uris = new HashMap<String,String>();
            uris.put(ATOM_NS_PREFIX, ATOM_NS_URI);
            xpath.setNamespaceURIs(uris);

            List nodes = xpath.selectNodes(rootElement);
            Iterator iter = nodes.iterator();
            while (iter.hasNext())
            {
                Element element = (Element)iter.next();
                Attribute hrefAttr = element.attribute("href");
                String mimetype = element.attributeValue("type");
                if (mimetype == null || mimetype.length() == 0)
                {
                    mimetype = MimetypeMap.MIMETYPE_HTML;
                }
                String url = createUrl(engine, hrefAttr.getValue(), mimetype);
                if (url.startsWith("/"))
                {
                    url = rootPath + url;
                }
                hrefAttr.setValue(url);
            }
            
            OutputFormat outputFormat = OutputFormat.createPrettyPrint();
            XMLWriter writer = new XMLWriter(output, outputFormat);
            writer.write(rootElement);
            writer.flush();                
        }
        catch(DocumentException e)
        {
            throw new IOException(e.toString());
        }
    }
    else
    {
        super.writeResponse(input, output);
    }
}
 

public void applyXPath(String xml, String xpath, boolean deleteNS) throws Exception
  {
// remove beginning to '<' character
int iPosBegin = xml.indexOf('<');
if (iPosBegin > 0)
{
	xml = xml.substring(iPosBegin);
}
// remove from '>' character to the end
int iPosEnd = xml.lastIndexOf('>');
if ((iPosEnd > 0) && (iPosEnd < xml.length() - 1))
{
	xml = xml.substring(0, iPosEnd + 1);
}

int iPosXMLLine = xml.indexOf("<?xml");
if (iPosXMLLine < 0)
{
	// when java writes string, it is in ISO-8859-nn format
	xml = "<?xml version='1.0' encoding=\"ISO-8859-15\"?>\n" + xml;
}

// remove the namespace because the parser does not support them if there are not declare in the root node
if (deleteNS)
{
	xml = xml.replaceAll("<[a-zA-Z\\.0-9_]+:", "<");
	xml = xml.replaceAll("</[a-zA-Z\\.0-9_]+:", "</");
}
// remove doctype information (dtd files for the XML syntax)
xml = xml.replaceAll("<!DOCTYPE\\s+\\w+\\s+\\w+\\s+[^>]+>", "");

InputStream input = new ByteArrayInputStream(xml.getBytes());
   SAXReader reader = new SAXReader(false);
   reader.setEntityResolver(new XMLLoaderEntityResolver());
   Document document = reader.read(input);
   
   XPath xpathObject = document.createXPath(xpath);
   Object obj = xpathObject.evaluate(document.getRootElement());
	
   if (obj instanceof List)
   {
       List<Node> list = (List<Node>) obj;
       for (Node node : list)
       {
       	addObject(node);
       }
   }
   else 
   {
   	addObject(obj);
   }
  }
 

/**
 * Constructor of the content packaging tree model
 * 
 * @param manifest
 *            the imsmanifest.xml file
 */
public CPManifestTreeModel(final VFSLeaf manifest) {
    final Document doc = loadDocument(manifest);
    // get all organization elements. need to set namespace
    rootElement = doc.getRootElement();
    final String nsuri = rootElement.getNamespace().getURI();
    nsuris.put("ns", nsuri);

    final XPath meta = rootElement.createXPath("//ns:organization");
    meta.setNamespaceURIs(nsuris);
    final Element orgaEl = (Element) meta.selectSingleNode(rootElement); // TODO: accept several organizations?
    if (orgaEl == null) {
        throw new AssertException("could not find element organization");
    }

    final XPath metares = rootElement.createXPath("//ns:resources");
    metares.setNamespaceURIs(nsuris);
    final Element elResources = (Element) metares.selectSingleNode(rootElement);
    if (elResources == null) {
        throw new AssertException("could not find element resources");
    }

    final List resourcesList = elResources.elements("resource");
    resources = new HashMap(resourcesList.size());
    for (final Iterator iter = resourcesList.iterator(); iter.hasNext();) {
        final Element elRes = (Element) iter.next();
        final String identVal = elRes.attributeValue("identifier");
        String hrefVal = elRes.attributeValue("href");
        if (hrefVal != null) { // href is optional element for resource element
            try {
                hrefVal = URLDecoder.decode(hrefVal, "UTF-8");
            } catch (final UnsupportedEncodingException e) {
                // each JVM must implement UTF-8
            }
        }
        resources.put(identVal, hrefVal);
    }
    final GenericTreeNode gtn = buildNode(orgaEl);
    setRootNode(gtn);
    rootElement = null; // help gc
    resources = null;
}
 

public XPath createXPath(String xpath) throws InvalidXPathException {
	return element.createXPath( xpath );
}
 

/**
 * Check for title and at least one resource.
 * 
 * @param unzippedDir
 * @return True if is of type.
 */
public static boolean validate(final File unzippedDir) throws AddingResourceException {
    final File fManifest = new File(unzippedDir, "imsmanifest.xml");
    final Document doc = IMSLoader.loadIMSDocument(fManifest);
    // do not throw exception already here, as it might be only a generic zip file
    if (doc == null) {
        return false;
    }

    // get all organization elements. need to set namespace
    final Element rootElement = doc.getRootElement();
    final String nsuri = rootElement.getNamespace().getURI();
    final Map nsuris = new HashMap(1);
    nsuris.put("ns", nsuri);

    // Check for organiztaion element. Must provide at least one... title gets ectracted from either
    // the (optional) <title> element or the mandatory identifier attribute.
    // This makes sure, at least a root node gets created in CPManifestTreeModel.
    final XPath meta = rootElement.createXPath("//ns:organization");
    meta.setNamespaceURIs(nsuris);
    final Element orgaEl = (Element) meta.selectSingleNode(rootElement); // TODO: accept several organizations?
    if (orgaEl == null) {
        throw new AddingResourceException("resource.no.organisation");
    }

    // Check for at least one <item> element referencing a <resource>, which will serve as an entry point.
    // This is mandatory, as we need an entry point as the user has the option of setting
    // CPDisplayController to not display a menu at all, in which case the first <item>/<resource>
    // element pair gets displayed.
    final XPath resourcesXPath = rootElement.createXPath("//ns:resources");
    resourcesXPath.setNamespaceURIs(nsuris);
    final Element elResources = (Element) resourcesXPath.selectSingleNode(rootElement);
    if (elResources == null) {
        throw new AddingResourceException("resource.no.resource"); // no <resources> element.
    }
    final XPath itemsXPath = rootElement.createXPath("//ns:item");
    itemsXPath.setNamespaceURIs(nsuris);
    final List items = itemsXPath.selectNodes(rootElement);
    if (items.size() == 0) {
        throw new AddingResourceException("resource.no.item"); // no <item> element.
    }
    for (final Iterator iter = items.iterator(); iter.hasNext();) {
        final Element item = (Element) iter.next();
        final String identifierref = item.attributeValue("identifierref");
        if (identifierref == null) {
            continue;
        }
        final XPath resourceXPath = rootElement.createXPath("//ns:resource[@identifier='" + identifierref + "']");
        resourceXPath.setNamespaceURIs(nsuris);
        final Element elResource = (Element) resourceXPath.selectSingleNode(elResources);
        if (elResource == null) {
            throw new AddingResourceException("resource.no.matching.resource");
        }
        if (elResource.attribute("scormtype") != null) {
            return false;
        }
        if (elResource.attribute("scormType") != null) {
            return false;
        }
        if (elResource.attribute("SCORMTYPE") != null) {
            return false;
        }
        if (elResource.attributeValue("href") != null) {
            return true; // success.
        }
    }
    return false;
    // throw new AddingResourceException("resource.general.error");
}
 

/**
 * Constructor of the content packaging tree model
 * 
 * @param scormFolderPath
 *            the imsmanifest.xml file
 * @param itemStatus
 *            a Map containing the status of each item like "completed, not attempted, ..."
 */
public ScormCPManifestTreeModel(final String scormFolderPath, final Map itemStatus) {
    ScormEBL scormEbl = CoreSpringFactory.getBean(ScormEBL.class);
    this.itemStatus = itemStatus;
    final Document doc = loadDocument(scormEbl.getManifestFile(scormFolderPath));
    // get all organization elements. need to set namespace
    rootElement = doc.getRootElement();
    final String nsuri = rootElement.getNamespace().getURI();
    nsuris.put("ns", nsuri);

    final XPath meta = rootElement.createXPath("//ns:organization");
    meta.setNamespaceURIs(nsuris);

    final XPath metares = rootElement.createXPath("//ns:resources");
    metares.setNamespaceURIs(nsuris);
    final Element elResources = (Element) metares.selectSingleNode(rootElement);
    if (elResources == null) {
        throw new AssertException("could not find element resources");
    }

    final List resourcesList = elResources.elements("resource");
    resources = new HashMap(resourcesList.size());
    for (final Iterator iter = resourcesList.iterator(); iter.hasNext();) {
        final Element elRes = (Element) iter.next();
        final String identVal = elRes.attributeValue("identifier");
        String hrefVal = elRes.attributeValue("href");
        if (hrefVal != null) { // href is optional element for resource element
            try {
                hrefVal = URLDecoder.decode(hrefVal, "UTF-8");
            } catch (final UnsupportedEncodingException e) {
                // each JVM must implement UTF-8
            }
        }
        resources.put(identVal, hrefVal);
    }
    /*
     * Get all organizations
     */
    List organizations = new LinkedList();
    organizations = meta.selectNodes(rootElement);
    if (organizations.isEmpty()) {
        throw new AssertException("could not find element organization");
    }
    final GenericTreeNode gtn = buildTreeNodes(organizations);
    setRootNode(gtn);
    rootElement = null; // help gc
    resources = null;
}
 

private GenericTreeNode buildNode(final Element item) {
    final GenericTreeNode treeNode = new GenericTreeNode();

    // extract title
    String title = item.elementText("title");
    if (title == null) {
        title = item.attributeValue("identifier");
    }
    treeNode.setAltText(title);
    treeNode.setTitle(title);

    if (item.getName().equals("organization")) {
        treeNode.setIconCssClass("o_scorm_org");
        treeNode.setAccessible(false);
    } else if (item.getName().equals("item")) {
        scormIdToNode.put(new Integer(nodeId).toString(), treeNode);
        nodeToId.put(treeNode, new Integer(nodeId));

        // set node images according to scorm sco status
        final String itemStatusDesc = (String) itemStatus.get(Integer.toString(nodeId));
        treeNode.setIconCssClass("o_scorm_item");
        if (itemStatusDesc != null) {
            // add icon decorator for current status
            treeNode.setIconDecorator1CssClass("o_scorm_" + itemStatusDesc);
        }

        nodeId++;
        // set resolved file path directly
        final String identifierref = item.attributeValue("identifierref");
        final XPath meta = rootElement.createXPath("//ns:resource[@identifier='" + identifierref + "']");
        meta.setNamespaceURIs(nsuris);
        final String href = (String) resources.get(identifierref);
        if (href != null) {
            treeNode.setUserObject(href);
            // allow lookup of a treenode given a href so we can quickly adjust the menu if the user clicks on hyperlinks within the text
            hrefToTreeNode.put(href, treeNode);
        } else {
            treeNode.setAccessible(false);
        }
    }

    final List chds = item.elements("item");
    final int childcnt = chds.size();
    for (int i = 0; i < childcnt; i++) {
        final Element childitem = (Element) chds.get(i);
        final GenericTreeNode gtnchild = buildNode(childitem);
        treeNode.addChild(gtnchild);
    }
    return treeNode;
}
 

/**
 * Constructor of the content packaging tree model
 * 
 * @param manifest
 *            the imsmanifest.xml file
 */
public CPManifestTreeModel(final VFSLeaf manifest) {
    final Document doc = loadDocument(manifest);
    // get all organization elements. need to set namespace
    rootElement = doc.getRootElement();
    final String nsuri = rootElement.getNamespace().getURI();
    nsuris.put("ns", nsuri);

    final XPath meta = rootElement.createXPath("//ns:organization");
    meta.setNamespaceURIs(nsuris);
    final Element orgaEl = (Element) meta.selectSingleNode(rootElement); // TODO: accept several organizations?
    if (orgaEl == null) {
        throw new AssertException("could not find element organization");
    }

    final XPath metares = rootElement.createXPath("//ns:resources");
    metares.setNamespaceURIs(nsuris);
    final Element elResources = (Element) metares.selectSingleNode(rootElement);
    if (elResources == null) {
        throw new AssertException("could not find element resources");
    }

    final List resourcesList = elResources.elements("resource");
    resources = new HashMap(resourcesList.size());
    for (final Iterator iter = resourcesList.iterator(); iter.hasNext();) {
        final Element elRes = (Element) iter.next();
        final String identVal = elRes.attributeValue("identifier");
        String hrefVal = elRes.attributeValue("href");
        if (hrefVal != null) { // href is optional element for resource element
            try {
                hrefVal = URLDecoder.decode(hrefVal, "UTF-8");
            } catch (final UnsupportedEncodingException e) {
                // each JVM must implement UTF-8
            }
        }
        resources.put(identVal, hrefVal);
    }
    final GenericTreeNode gtn = buildNode(orgaEl);
    setRootNode(gtn);
    rootElement = null; // help gc
    resources = null;
}
 

/**
 * Check for title and at least one resource.
 * 
 * @param unzippedDir
 * @return True if is of type.
 */
public static boolean validate(final File unzippedDir) throws AddingResourceException {
    final File fManifest = new File(unzippedDir, "imsmanifest.xml");
    final Document doc = IMSLoader.loadIMSDocument(fManifest);
    // do not throw exception already here, as it might be only a generic zip file
    if (doc == null) {
        return false;
    }

    // get all organization elements. need to set namespace
    final Element rootElement = doc.getRootElement();
    final String nsuri = rootElement.getNamespace().getURI();
    final Map nsuris = new HashMap(1);
    nsuris.put("ns", nsuri);

    // Check for organiztaion element. Must provide at least one... title gets ectracted from either
    // the (optional) <title> element or the mandatory identifier attribute.
    // This makes sure, at least a root node gets created in CPManifestTreeModel.
    final XPath meta = rootElement.createXPath("//ns:organization");
    meta.setNamespaceURIs(nsuris);
    final Element orgaEl = (Element) meta.selectSingleNode(rootElement); // TODO: accept several organizations?
    if (orgaEl == null) {
        throw new AddingResourceException("resource.no.organisation");
    }

    // Check for at least one <item> element referencing a <resource>, which will serve as an entry point.
    // This is mandatory, as we need an entry point as the user has the option of setting
    // CPDisplayController to not display a menu at all, in which case the first <item>/<resource>
    // element pair gets displayed.
    final XPath resourcesXPath = rootElement.createXPath("//ns:resources");
    resourcesXPath.setNamespaceURIs(nsuris);
    final Element elResources = (Element) resourcesXPath.selectSingleNode(rootElement);
    if (elResources == null) {
        throw new AddingResourceException("resource.no.resource"); // no <resources> element.
    }
    final XPath itemsXPath = rootElement.createXPath("//ns:item");
    itemsXPath.setNamespaceURIs(nsuris);
    final List items = itemsXPath.selectNodes(rootElement);
    if (items.size() == 0) {
        throw new AddingResourceException("resource.no.item"); // no <item> element.
    }
    for (final Iterator iter = items.iterator(); iter.hasNext();) {
        final Element item = (Element) iter.next();
        final String identifierref = item.attributeValue("identifierref");
        if (identifierref == null) {
            continue;
        }
        final XPath resourceXPath = rootElement.createXPath("//ns:resource[@identifier='" + identifierref + "']");
        resourceXPath.setNamespaceURIs(nsuris);
        final Element elResource = (Element) resourceXPath.selectSingleNode(elResources);
        if (elResource == null) {
            throw new AddingResourceException("resource.no.matching.resource");
        }
        if (elResource.attribute("scormtype") != null) {
            return false;
        }
        if (elResource.attribute("scormType") != null) {
            return false;
        }
        if (elResource.attribute("SCORMTYPE") != null) {
            return false;
        }
        if (elResource.attributeValue("href") != null) {
            return true; // success.
        }
    }
    return false;
    // throw new AddingResourceException("resource.general.error");
}
 

/**
 * Constructor of the content packaging tree model
 * 
 * @param scormFolderPath
 *            the imsmanifest.xml file
 * @param itemStatus
 *            a Map containing the status of each item like "completed, not attempted, ..."
 */
public ScormCPManifestTreeModel(final String scormFolderPath, final Map itemStatus) {
    ScormEBL scormEbl = CoreSpringFactory.getBean(ScormEBL.class);
    this.itemStatus = itemStatus;
    final Document doc = loadDocument(scormEbl.getManifestFile(scormFolderPath));
    // get all organization elements. need to set namespace
    rootElement = doc.getRootElement();
    final String nsuri = rootElement.getNamespace().getURI();
    nsuris.put("ns", nsuri);

    final XPath meta = rootElement.createXPath("//ns:organization");
    meta.setNamespaceURIs(nsuris);

    final XPath metares = rootElement.createXPath("//ns:resources");
    metares.setNamespaceURIs(nsuris);
    final Element elResources = (Element) metares.selectSingleNode(rootElement);
    if (elResources == null) {
        throw new AssertException("could not find element resources");
    }

    final List resourcesList = elResources.elements("resource");
    resources = new HashMap(resourcesList.size());
    for (final Iterator iter = resourcesList.iterator(); iter.hasNext();) {
        final Element elRes = (Element) iter.next();
        final String identVal = elRes.attributeValue("identifier");
        String hrefVal = elRes.attributeValue("href");
        if (hrefVal != null) { // href is optional element for resource element
            try {
                hrefVal = URLDecoder.decode(hrefVal, "UTF-8");
            } catch (final UnsupportedEncodingException e) {
                // each JVM must implement UTF-8
            }
        }
        resources.put(identVal, hrefVal);
    }
    /*
     * Get all organizations
     */
    List organizations = new LinkedList();
    organizations = meta.selectNodes(rootElement);
    if (organizations.isEmpty()) {
        throw new AssertException("could not find element organization");
    }
    final GenericTreeNode gtn = buildTreeNodes(organizations);
    setRootNode(gtn);
    rootElement = null; // help gc
    resources = null;
}
 

private GenericTreeNode buildNode(final Element item) {
    final GenericTreeNode treeNode = new GenericTreeNode();

    // extract title
    String title = item.elementText("title");
    if (title == null) {
        title = item.attributeValue("identifier");
    }
    treeNode.setAltText(title);
    treeNode.setTitle(title);

    if (item.getName().equals("organization")) {
        treeNode.setIconCssClass("o_scorm_org");
        treeNode.setAccessible(false);
    } else if (item.getName().equals("item")) {
        scormIdToNode.put(new Integer(nodeId).toString(), treeNode);
        nodeToId.put(treeNode, new Integer(nodeId));

        // set node images according to scorm sco status
        final String itemStatusDesc = (String) itemStatus.get(Integer.toString(nodeId));
        treeNode.setIconCssClass("o_scorm_item");
        if (itemStatusDesc != null) {
            // add icon decorator for current status
            treeNode.setIconDecorator1CssClass("o_scorm_" + itemStatusDesc);
        }

        nodeId++;
        // set resolved file path directly
        final String identifierref = item.attributeValue("identifierref");
        final XPath meta = rootElement.createXPath("//ns:resource[@identifier='" + identifierref + "']");
        meta.setNamespaceURIs(nsuris);
        final String href = (String) resources.get(identifierref);
        if (href != null) {
            treeNode.setUserObject(href);
            // allow lookup of a treenode given a href so we can quickly adjust the menu if the user clicks on hyperlinks within the text
            hrefToTreeNode.put(href, treeNode);
        } else {
            treeNode.setAccessible(false);
        }
    }

    final List chds = item.elements("item");
    final int childcnt = chds.size();
    for (int i = 0; i < childcnt; i++) {
        final Element childitem = (Element) chds.get(i);
        final GenericTreeNode gtnchild = buildNode(childitem);
        treeNode.addChild(gtnchild);
    }
    return treeNode;
}
 

public XPath createXPath(String xpathExpression)
		throws InvalidXPathException {
	return getWrapped().createXPath(xpathExpression);
}