Metacat

    /**

     * Data Document ID location within an FGDC document.  XPath expression.

     */

    public static final String              FGDC_DATA_FILE_DOCID_XPATH = "/metadata/distinfo/stdorder/digform/digtopt/onlinopt/computer/networka/networkr";

    /**

     * Metadata Document ID location within an FGDC document.  XPath expression.

     */

    public static final String              FGDC_DOCID_XPATH = "/metadata/distinfo/resdesc";

    public void setMetadataDoc(Document doc) {

        metadataDoc = doc;

    }

    public void setMetadataDoc(String docId) throws Exception {

        Document                        doc = null;

        BufferedReader                  buffy;

        Properties                      prop;

        InputStream                     response;

        //*** MetaCatServlet Properties: action, qformat and docid. ***

        prop = new Properties();

        prop.put("action", "read");

        prop.put("qformat", "xml");

        prop.put("docid", docId);

        response = sendData(prop, null, null, 0);

        if (response != null) {

            buffy = new BufferedReader(new InputStreamReader(response));

            doc = XMLUtilities.getXMLReaderAsDOMDocument(buffy);

        }

        setMetadataDoc(doc);

    }

    public Document getMetadataDoc() {

        return(metadataDoc);

    }

     * JSP API: Get the user's name.  This will be what was entered for the user name,

    private String nextVersion(String lastDocId) throws XPathExpressionException {

        String                      result = null, tokens[], scope, xPathQuery, ready2Split;

        final String                XPATH_QUERY_TEMPLATE = FGDC_DOCID_XPATH + "[text()='%1$s']";

        Node                        node;

        //*** Parse the last Doc Id, and increment the version number.

            ready2Split = lastDocId.replace('.','~'); //*** This is necessary for the split to work.

            tokens = ready2Split.split("~");

        //*** Update the Doc Id in the metadata file.

        if (getMetadataDoc() != null) {

            xPathQuery = String.format(XPATH_QUERY_TEMPLATE, lastDocId);

            node = (Node) xpath.evaluate(xPathQuery, getMetadataDoc().getDocumentElement(), XPathConstants.NODE);

            node.setTextContent(result);

        }

        String                      sysId;

        Node                        node = null;

        if (getMetadataDoc() != null) {

            docType = getMetadataDoc().getDoctype();

        if (getMetadataDoc() != null && !result) {

                node = (Node) xpath.evaluate(FGDC_TEST_EXPRESSION, getMetadataDoc().getDocumentElement(), XPathConstants.NODE);

            result = (node != null);

     * Reads request parameters 'pathExpr' (String[]), 'pathValue' (String)

    private String removeDataDocIdFromFGDC(String docId, String parentDocId) throws Exception {

        String                          pathToDigform, revision = "";

        final String                    PATH4ANCESTOR = FGDC_DATA_FILE_DOCID_XPATH + "[text()='%1$s']/ancestor::node()[name()='%2$s']";

        //*** Get the metadata document and remove the digform branch.

        doc = getMetadataDoc();

        if (doc != null) {

            //System.out.println("MetacatClinet.removeDataDocIdFromFGDC: BEFORE\n" + XMLUtilities.getDOMTreeAsString(doc.getDocumentElement()));

            pathToDigform = String.format(PATH4ANCESTOR, docId, "digform");

            node = (Node) xpath.evaluate(pathToDigform, doc.getDocumentElement(), XPathConstants.NODE);

            node.getParentNode().removeChild(node);

            //System.out.println("MetacatClinet.removeDataDocIdFromFGDC: AFTER\n" + XMLUtilities.getDOMTreeAsString(doc.getDocumentElement()));

            revision = nextVersion(parentDocId);

            reader = XMLUtilities.getDOMTreeAsReader(doc.getDocumentElement(), false);

            update(revision, reader, null);

        }

        return(revision);

    }

    /**

     * Removes the data Doc Id from the FGDC document in the Metacat database.

     * Determines what

     * metadata file is including this file.  It then queries metacat for the parent FGDC

     * document and removes the Doc Id from it, and reloads the new version of the FGDC

     * document with a new revision number.  This is intended to be called after

     * a call to MetacatClient.delete(docId).

     * @param docId String which contains the document Id.

     * @return String server response, if any.

     */

    public void clientDeleteRequest(HttpServletRequest request) {

        String                      result = null, docId, subDocId, parentDocId, revisedDocId;

        NodeList                    nodeLst;

        final String                SUB_DOCS_PATH = FGDC_DATA_FILE_DOCID_XPATH + "/text()";

        Node                        node;

        Document                    resultSetDoc;

            //*** First, determine what metadata file is including this file (if any).

            resultSetDoc = query(FGDC_DATA_FILE_DOCID_XPATH, docId, null);

            parentDocId = xpath.evaluate("/resultset/document/docid", resultSetDoc.getDocumentElement());

                setMetadataDoc(parentDocId);

                //*** Remove Doc Id from any parent metadata document.

                revisedDocId = removeDataDocIdFromFGDC(docId, parentDocId);

                setSessValue("docId", revisedDocId, request);

            } else {

                setMetadataDoc(docId);

                //*** This is a metadata document, so remove all of the sub-docId's.

                nodeLst = (NodeList) xpath.evaluate(SUB_DOCS_PATH, getMetadataDoc().getDocumentElement(), XPathConstants.NODESET);

                for(int i = 0; i < nodeLst.getLength(); i++) {

                    node = nodeLst.item(i);

                    subDocId = node.getNodeValue();

                    //*** Remove the sub-document.

                    try {

                        delete(subDocId);

                    } catch (MetacatException ex) {

                        ex.printStackTrace();

                    }

            //*** Remove the document.

            result = delete(docId);

            //*** Save the server feedback in the session, to be used by the view.

            setSessValue("updateFeedback", result, request);