biomine.bmvis2.crawling.Databases.java Source code

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Here is the source code for biomine.bmvis2.crawling.Databases.java

Source

/*
 * Copyright 2012 University of Helsinki.
 *
 * This file is part of BMVis.
 *
 * BMVis is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * BMVis 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with BMVis.  If not, see
 * <http://www.gnu.org/licenses/>.
 */

package biomine.bmvis2.crawling;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashSet;

import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.JSONValue;

/**
 * Fetches info of existing databases.
 * @author alhartik
 *
 */
public class Databases {

    private static ArrayList<String> dbs = null;

    public static Collection<String> getDatabases() {
        if (dbs != null)
            return dbs;

        try {
            String url = WebConstants.BIOMINE_URL + "stats/index.cgi?json_action=getdbs";
            String cont = URLUtils.getURLContents(new URL(url));
            Object arr = JSONValue.parse(cont);
            if (arr instanceof JSONArray) {
                JSONArray jarr = (JSONArray) arr;
                dbs = new ArrayList();
                for (Object dbo : jarr) {
                    JSONObject jdb = (JSONObject) dbo;
                    Object no = jdb.get("name");
                    if (no != null)
                        dbs.add(no.toString());
                }
                Collections.reverse(dbs);
                return dbs;
            }
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (ClassCastException e) {
            // TODO: handle exception
        }
        return Collections.EMPTY_LIST;
    }

    //   public static void main(String... args){
    //      for(String db:getDatabases()){
    //         System.out.println(db);
    //      }
    //   }
    //   public static void registerDatabase(String db){
    //      dbs.add(db);
    //   }
}