Metacat

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.parsers.ParserConfigurationException;

import javax.xml.xpath.XPathConstants;

import javax.xml.xpath.XPathFactory;

import org.dataone.configuration.Settings;

import org.w3c.dom.Document;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

import org.xml.sax.SAXException;

    private static final String SOLR_SYSTEMINFO_URLAPPENDIX = "solr.systeminfo.urlappendix";

    private static final String SOLR_SCHEMA_URLAPPENDIX = "sorl.schema.urlappendix";

    private static final String SPEC_PATH = "//str[@name=\"solr-spec-version\"]";

     * Get the list of the valid field name (moved the fields names of the CopyFieldTarget).

     * @return

     */

    public List<String> getValidSchemaField() {

        return null;

    }

    /**

        if(solrSpecVersion == null) {

            getHttpSolrServerVersion();

        }  

        return solrSpecVersion;

    /*

     * Get the solr server version from the system information url. 

     */

    private void getHttpSolrServerVersion() {

        String systemInfoUrlAppendix = Settings.getConfiguration().getString(SOLR_SYSTEMINFO_URLAPPENDIX);

        String systemInfoUrl = solrServerBaseURL+systemInfoUrlAppendix;

        try {

            Document doc = transformInputStreamToDoc((new URL(systemInfoUrl)).openStream());

            NodeList nodeList = (NodeList) XPathFactory.newInstance().newXPath()

                            .evaluate(SPEC_PATH, doc, XPathConstants.NODESET);

            if(nodeList != null && nodeList.getLength() >0) {

                Node specNode = nodeList.item(0);

                solrSpecVersion = specNode.getFirstChild().getNodeValue();

            } else {

                solrSpecVersion = UNKNOWN;

            }

        } catch (Exception e) {

            log.error("HttpSolrQueryService.getHttpSolrServerVersion - can't get the solr specification version since "+e.getMessage());

            solrSpecVersion = UNKNOWN;

        }

    }

     * Generate a Document from the InputStream

     * @param input

     * @throws ParserConfigurationException

     * @throws SAXException

     * @throws IOException

    private Document transformInputStreamToDoc(InputStream input) throws ParserConfigurationException, SAXException, IOException {

        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();

        DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();

        Document doc = dBuilder.parse(input);

        return doc;