mml.handler.get.MMLGetVersion1Handler.java Source code

Introduction

Here is the source code for mml.handler.get.MMLGetVersion1Handler.java

Source

/*
 * This file is part of MML.
 *
 *  MML 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.
 *
 *  MML 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 MML.  If not, see <http://www.gnu.org/licenses/>.
 *  (c) copyright Desmond Schmidt 2015
 */
package mml.handler.get;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import mml.exception.MMLException;
import calliope.core.database.Connection;
import calliope.core.database.Connector;
import calliope.core.constants.Database;
import calliope.core.constants.JSONKeys;
import calliope.core.handler.EcdosisMVD;
import mml.constants.Params;
import org.json.simple.JSONValue;
import org.json.simple.JSONObject;
import edu.luc.nmerge.mvd.MVD;
import edu.luc.nmerge.mvd.MVDFile;
import java.util.ArrayList;

/**
 * Get the version1 attribute of a CORTEX
 * @author desmond
 */
public class MMLGetVersion1Handler extends MMLGetHandler {
    public void handle(HttpServletRequest request, HttpServletResponse response, String urn) throws MMLException {
        try {
            Connection conn = Connector.getConnection();
            docid = request.getParameter(Params.DOCID);
            String res = conn.getFromDb(Database.CORTEX, docid);
            if (res != null) {
                JSONObject jObj = (JSONObject) JSONValue.parse(res);
                if (jObj.containsKey(JSONKeys.VERSION1)) {
                    version1 = (String) jObj.get(JSONKeys.VERSION1);
                    if (!Layers.isNewStyleLayer(version1)) {
                        if (((String) jObj.get(JSONKeys.FORMAT)).startsWith("MVD")) {
                            String body = (String) jObj.get(JSONKeys.BODY);
                            if (body != null) {
                                MVD mvd = MVDFile.internalise(body);
                                String[] all = getAllVersions(mvd);
                                version1 = Layers.upgradeLayerName(all, version1);
                            }
                        } else {
                            String[] all = new String[1];
                            all[0] = version1;
                            version1 = Layers.upgradeLayerName(all, version1);
                        }
                    }
                } else if (((String) jObj.get(JSONKeys.FORMAT)).startsWith("MVD")) {
                    String body = (String) jObj.get(JSONKeys.BODY);
                    if (body != null) {
                        MVD mvd = MVDFile.internalise(body);
                        String[] all = getAllVersions(mvd);
                        String groupPath = mvd.getGroupPath((short) 1);
                        String shortName = mvd.getVersionShortName((short) 1);
                        version1 = Layers.upgradeLayerName(all, groupPath + "/" + shortName);
                        jObj.put(JSONKeys.VERSION1, version1);
                        jObj.remove(JSONKeys._ID);
                        conn.putToDb(Database.CORTEX, docid, jObj.toJSONString());
                    } else
                        version1 = ""; // nothing there
                } else
                    version1 = "/base";
            } else
                version1 = "";
            response.setContentType("text/plain");
            response.getWriter().write(version1.replaceAll("\\\\/", "/"));
        } catch (Exception e) {
            throw new MMLException(e);
        }
    }
}