/**
* Copyright (c) 2010, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. licenses this file to you under the Apache License,
* Version 2.0 (the "License"); you may not use this file except
* in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.wso2.carbon.bpel.ui.bpel2svg;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.axis2.context.ConfigurationContext;
import org.apache.axiom.om.OMElement;
import org.wso2.carbon.ui.CarbonUIUtil;
import org.wso2.carbon.CarbonConstants;
import org.wso2.carbon.bpel.ui.clients.ProcessManagementServiceClient;
import org.wso2.carbon.bpel.ui.bpel2svg.impl.BPELImpl;
import org.wso2.carbon.bpel.ui.bpel2svg.impl.SVGImpl;
import org.wso2.carbon.utils.ServerConstants;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServlet;
import javax.servlet.ServletException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletOutputStream;
import javax.xml.namespace.QName;
import java.io.IOException;
import java.util.logging.Logger;
import java.util.logging.Level;
/**
* SVG Generator
*/
public class SVGGenerateServlet extends HttpServlet {
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Log log = LogFactory.getLog(SVGGenerateServlet.class);
HttpSession session = request.getSession(true);
String pid = (String) request.getParameter("pid");
ServletConfig config = getServletConfig();
String backendServerURL = CarbonUIUtil.getServerURL(config.getServletContext(), session);
ConfigurationContext configContext =
(ConfigurationContext) config.getServletContext().getAttribute(CarbonConstants.CONFIGURATION_CONTEXT);
String cookie = (String) session.getAttribute(ServerConstants.ADMIN_SERVICE_COOKIE);
String processDef = null;
ProcessManagementServiceClient client = null;
SVGInterface svg = null;
String svgStr = null;
ServletOutputStream sos = null;
sos = response.getOutputStream();
try {
client = new ProcessManagementServiceClient(cookie, backendServerURL, configContext,
request.getLocale());
processDef = client.getProcessInfo(QName.valueOf(pid)).getDefinitionInfo().getDefinition().getExtraElement().toString();
BPELInterface bpel = new BPELImpl();
OMElement bpelStr = bpel.load(processDef);
bpel.processBpelString(bpelStr);
LayoutManager layoutManager = BPEL2SVGFactory.getInstance().getLayoutManager();
layoutManager.setVerticalLayout(true);
layoutManager.layoutSVG(bpel.getRootActivity());
svg = new SVGImpl();
svg.setRootActivity(bpel.getRootActivity());
//base64Str = "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";
response.setContentType("image/svg+xml");
//sos.write(Base64.decodeBase64(base64Str.getBytes()));
svgStr = svg.generateSVGString();
if (svgStr != null) {
sos.write(svgStr.getBytes());
sos.flush();
sos.close();
}
} catch (Exception e) {
log.error("SVG Generation Error", e);
String errorSVG = "<svg version=\"1.1\"\n" +
" xmlns=\"http://www.w3.org/2000/svg\"><text y=\"50\">Could not display SVG</text></svg>";
sos.write(errorSVG.getBytes());
sos.flush();
sos.close();
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP <code>GET</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
processRequest(request, response);
} catch (ServletException ex) {
Logger.getLogger(PNGGenarateServlet.class.getName()).log(Level.SEVERE, null, ex);
}
}
/**
* Handles the HTTP <code>POST</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
processRequest(request, response);
} catch (ServletException ex) {
Logger.getLogger(PNGGenarateServlet.class.getName()).log(Level.SEVERE, null, ex);
}
}
}