Metacat

/**

 *  '$RCSfile$'

 *  Copyright: 2000-2005 Regents of the University of California and the

 *             National Center for Ecological Analysis and Synthesis

 *

 *   '$Author: leinfelder $'

 *     '$Date: 2013-09-23 15:54:55 -0700 (Mon, 23 Sep 2013) $'

 * '$Revision: 8265 $'

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

package edu.ucsb.nceas.metacat.lsid;

import java.io.IOException;

import java.io.InputStream;

import java.net.MalformedURLException;

import java.net.URL;

import java.util.ResourceBundle;

import java.util.StringTokenizer;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import com.ibm.lsid.LSID;

import com.ibm.lsid.server.LSIDServerException;

public class LSIDDataLookup

{

    public static final int UNKNOWN = 1;

    public static final int ABSTRACT = 2;

    public static final int CONCRETE = 4;

    private static Log logger = LogFactory

                    .getLog("edu.ucsb.nceas.metacat.lsid");

    public LSIDDataLookup() throws LSIDServerException

    {

        logger.info("Creating LSIDDataLookup (Metacat).");

    }

    public String getDocType(LSID lsid) {

      // example

      //http://metacat.nceas.ucsb.edu/metacat/metacat?action=getrevisionanddoctype&docid=knb-lter-gce.109.6

      // returns rev;doctype

      String _docType = null;

      String ns = lsid.getNamespace();

      String id = lsid.getObject();

      String ver = lsid.getRevision();

      InputStream docStream = null;

      ResourceBundle rb = ResourceBundle.getBundle("metacat-lsid");

      String theServer = rb.getString("metacatserver");

      logger.debug("the server is " + theServer);

      String url = theServer + "?action=getrevisionanddoctype&docid=";

      url = url + ns + "." + id + "." + ver;

      try {

        URL theDoc = new URL(url);

        docStream = theDoc.openStream();

        StringTokenizer _st = new StringTokenizer(LSIDAuthorityMetaData.

                                                  getStringFromInputStream(

            docStream), ";");

        _st.nextToken();

        _docType = _st.nextToken();

        docStream.close();

      }

      catch (MalformedURLException mue) {

        logger.error("MalformedURLException in LSIDDataLookup: " + mue);

        mue.printStackTrace();

      }

      catch (IOException ioe) {

        logger.error("IOException in LSIDDataLookup: " + ioe);

        ioe.printStackTrace();

      }

      return _docType;

    }

    public int lsidType(LSID lsid) throws LSIDServerException

    {

        int result = CONCRETE;

        return result;

    }

    public InputStream lsidData(LSID lsid) throws LSIDServerException

    {

        String ns = lsid.getNamespace();

        String id = lsid.getObject();

        String ver = lsid.getRevision();

        InputStream docStream = null;

        // example metacat query

        // http://metacat.nceas.ucsb.edu/metacat/metacat?action=read&qformat=xml&docid=knb-lter-gce.109.6

        //

        ResourceBundle rb = ResourceBundle.getBundle("metacat-lsid");

        String theServer = rb.getString("metacatserver");

        logger.debug("the server is " + theServer);

        String url = theServer + "?action=read&qformat=xml&docid=";

        url = url + ns + "." + id + "." + ver;

        try {

            URL theDoc = new URL(url);

            docStream = theDoc.openStream();

        } catch (MalformedURLException mue) {

            logger.error("MalformedURLException in LSIDDataLookup: " + mue);

            mue.printStackTrace();

        } catch (IOException ioe) {

            logger.error("IOException in LSIDDataLookup: " + ioe);

            ioe.printStackTrace();

        }

        return docStream;

    }

}