bhl.pages.handler.PagesListHandler.java Source code

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Here is the source code for bhl.pages.handler.PagesListHandler.java

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/*
 * This file is part of BHLPages.
 *
 *  BHLPages 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.
 *
 *  BHLPages 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 BHLPages.  If not, see <http://www.gnu.org/licenses/>.
 *  (c) copyright Biodiversity Heritage Library 2015 
 *  http://www.biodiversitylibrary.org/
 */

package bhl.pages.handler;

import bhl.pages.constants.Database;
import bhl.pages.constants.JSONKeys;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import bhl.pages.constants.Params;
import bhl.pages.exception.MissingDocumentException;
import bhl.pages.database.Connection;
import bhl.pages.database.Connector;
import org.json.simple.JSONObject;
import org.json.simple.JSONValue;
import org.json.simple.JSONArray;

/**
 * Get a list of pages for a given document
 * @author desmond
 */
public class PagesListHandler extends PagesGetHandler {
    public void handle(HttpServletRequest request, HttpServletResponse response, String urn)
            throws MissingDocumentException {
        try {
            String docid = request.getParameter(Params.DOCID);
            if (docid != null) {
                Connection conn = Connector.getConnection();
                String[] keys = new String[2];
                keys[0] = JSONKeys.BHL_PAGE_ID;
                keys[1] = JSONKeys.PAGE_SEQUENCE;
                String[] pages = conn.listCollectionBySubKey(Database.PAGES, JSONKeys.IA_IDENTIFIER, docid, keys);
                JSONArray list = new JSONArray();
                for (int i = 0; i < pages.length; i++) {
                    JSONObject jobj = (JSONObject) JSONValue.parse(pages[i]);
                    Number pageNo = (Number) jobj.get(JSONKeys.PAGE_SEQUENCE);
                    Number pageId = (Number) jobj.get(JSONKeys.BHL_PAGE_ID);
                    System.out.println("pageNo=" + pageNo + " pageId=" + pageId);
                    PageDesc ps = new PageDesc(new Integer(pageNo.intValue()).toString(),
                            new Integer(pageId.intValue()).toString());
                    list.add(ps.toJSONObject());
                }
                PagesGetHandler.sortList(list);
                response.setContentType("application/json");
                response.getWriter().print(list.toJSONString());
            } else
                throw new Exception("Must specify document identifier");
        } catch (Exception e) {
            throw new MissingDocumentException(e);
        }
    }

}