edu.lafayette.metadb.web.ImageZoom.java Source code

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Here is the source code for edu.lafayette.metadb.web.ImageZoom.java

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/*
  MetaDB: A Distributed Metadata Collection Tool
  Copyright 2011, Lafayette College, Eric Luhrs, Haruki Yamaguchi, Long Ho.
    
  This file is part of MetaDB.
    
MetaDB 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 3 of the License, or
(at your option) any later version.
    
MetaDB 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 MetaDB.  If not, see <http://www.gnu.org/licenses/>.
 */
package edu.lafayette.metadb.web;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.json.JSONObject;

import edu.lafayette.metadb.model.commonops.Global;
import edu.lafayette.metadb.model.commonops.MetaDbHelper;
import edu.lafayette.metadb.model.items.ItemsDAO;

/**
 * Class to retrieve file paths for displaying thumbnails and zoom images in the UI.
 * 
 * @author Long L. Ho
 * @author Miguel Haruki Yamaguchi
 * @version 1.0 
 * 
 */
public class ImageZoom extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public ImageZoom() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doPost(request, response);
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        PrintWriter out = response.getWriter();
        JSONObject output = new JSONObject();

        try {

            String[] item = request.getParameter("item").split("-");
            int index = Integer.parseInt(item[item.length - 1]);
            String projname = "";
            for (int i = 0; i < item.length - 1; i++) {
                projname += item[i];
                if (i != item.length - 2)
                    projname += '-';
            }
            String thumbPath = ItemsDAO.getThumbFilePath(projname, index);
            String thumbName = new File(thumbPath).getName();
            String thumbFilePath = Global.PATH_PROJECT + projname + "/" + thumbName;
            String mediumPath = new File(ItemsDAO.getZoomDerivPath(projname, index)).getName();
            String mediumFilePath = Global.PATH_PROJECT + projname + "/" + mediumPath;

            output.put("thumb", thumbFilePath);
            output.put("zoom", mediumFilePath);
        } catch (NumberFormatException e) {
            // No item number for zoom
        } catch (Exception e) {
            MetaDbHelper.logEvent(e);
        }
        out.print(output);
        out.close();
    }

}