/*******************************************************************************
* Copyright (c) 2014 INRIA.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Juan David Villa Calle - (juan-david.villa_calle@inria.fr)
*******************************************************************************/
package fr.inria.atlanmod.collaboro.web.servlets;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EcorePackage;
import org.emftools.emf2gv.graphdesc.GraphdescPackage;
import org.emftools.emf2gv.processor.core.StandaloneProcessor;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import fr.inria.atlanmod.collaboro.backend.CollaboroBackendFactory;
import fr.inria.atlanmod.collaboro.history.User;
/**
* Service to render an EMF model as as jpg in base64
*
*/
@WebServlet(description = "Provides access to the abstract syntax", urlPatterns = { "/abstractSyntax" } )
public class AbstractSyntaxServlet extends AbstractRendererServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
addResponseOptions(response);
// Checking the user is logged
if(!isLogged(request)) {
response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
return;
}
HttpSession session = request.getSession(false);
User historyUser = (User) session.getAttribute("user");
String dsl = (String) session.getAttribute("dsl");
int numOfAbsModelImages=CollaboroBackendFactory.getBackend(dsl, historyUser.getId()).getNumOfAbsModelImages();
JsonObject responseObject = new JsonObject();
responseObject.addProperty("numImages", numOfAbsModelImages);
response.setContentType("application/json");
PrintWriter out = response.getWriter();
out.print(responseObject.toString());
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
addResponseOptions(response);
// Checking the user is logged
if(!isLogged(request)) {
response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
return;
}
HttpSession session = request.getSession(false);
User historyUser = (User) session.getAttribute("user");
String dsl = (String) session.getAttribute("dsl");
// Getting the parameters from the request
StringBuffer jb = new StringBuffer();
String line = null;
try {
BufferedReader reader = request.getReader();
while ((line = reader.readLine()) != null)
jb.append(line);
} catch (Exception e) {
throw new ServletException("There was an error reading the parameters");
}
JsonParser parser = new JsonParser();
JsonObject actionJsonObject = (JsonObject) parser.parse(jb.toString());
int num = actionJsonObject.get("numImage").getAsInt();
File pictureFile = CollaboroBackendFactory.getBackend(dsl, historyUser.getId()).getEcoreModel(num);
if(pictureFile == null)
pictureFile = new File(workingDir.getAbsolutePath() + "/error.jpg");
String resultImage;
try {
resultImage = encodeToString(pictureFile);
} catch (IOException e) {
throw new ServletException("Not possible to encode");
}
PrintWriter out = response.getWriter();
out.print(resultImage);
}
@Override
protected void doOptions(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
addResponseOptions(response);
}
}