public synchronized void addConfiguration(IProject project, IAConfiguration cfg) {
   String projectName = project.getName();
   Map<String, IAConfiguration> cfgs = getSavedConfigs(project);
   if (cfgs == null) {
     cfgs = new HashMap<>();
     configs.put(projectName, cfgs);
   }
   cfgs.put(cfg.getId(), cfg);
   saveConfigs(project);
 }
 private void saveConfigs(IProject project, ICConfigurationDescription[] cfgds) {
   try {
     String projectName = project.getName();
     IPath output = project.getLocation().append(CFG_FILE_NAME);
     File f = output.toFile();
     if (!f.exists()) f.createNewFile();
     if (f.exists()) {
       try (PrintWriter p = new PrintWriter(new BufferedWriter(new FileWriter(f)))) {
         Map<String, IAConfiguration> cfgs = configs.get(projectName);
         p.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"); // $NON-NLS-1$
         p.println("<configurations>"); // $NON-NLS-1$
         Option[] optionList = AutotoolsConfiguration.getOptionList();
         // Before saving, force any cloning to occur via the option
         // value handler.
         setSyncing(true);
         for (int i = 0; i < cfgds.length; ++i) {
           @SuppressWarnings("unused")
           CConfigurationData data = cfgds[i].getConfigurationData();
         }
         setSyncing(false);
         for (int i = 0; i < cfgds.length; ++i) {
           ICConfigurationDescription cfgd = cfgds[i];
           String id = cfgd.getId();
           IAConfiguration cfg = cfgs.get(id);
           if (cfg == null) {
             cfg = createDefaultConfiguration(id);
           }
           p.println("<configuration id=\"" + cfg.getId() + "\">"); // $NON-NLS-1$ //$NON-NLS-2$
           for (int j = 0; j < optionList.length; ++j) {
             Option option = optionList[j];
             IConfigureOption opt = cfg.getOption(option.getName());
             if (opt.isFlag()) {
               p.println(
                   "<flag id=\""
                       + option.getName()
                       + "\" value=\"" //$NON-NLS-1$ //$NON-NLS-2$
                       + xmlEscape(option.getDefaultValue())
                       + "\">"); //$NON-NLS-1$
               FlagConfigureOption fco = (FlagConfigureOption) opt;
               List<String> children = fco.getChildren();
               for (int k = 0; k < children.size(); ++k) {
                 String childName = children.get(k);
                 IConfigureOption childopt = cfg.getOption(childName);
                 p.println(
                     "<flagvalue id=\""
                         + childopt.getName()
                         + "\" value=\"" //$NON-NLS-1$ //$NON-NLS-2$
                         + xmlEscape(childopt.getValue())
                         + "\"/>"); // $NON-NLS-3$
               }
               p.println("</flag>"); // $NON-NLS-1$
             } else if (!opt.isCategory() && !opt.isFlagValue())
               p.println(
                   "<option id=\""
                       + option.getName()
                       + "\" value=\""
                       + xmlEscape(opt.getValue()) // $NON-NLS-1$ //$NON-NLS-2$
                       + "\"/>"); // $NON-NLS-3$
           }
           p.println("</configuration>"); // $NON-NLS-1$
           // Sync name field as this configuration is now
           // officially saved
           syncNameField(cfgd);
         }
         p.println("</configurations>");
       }
     }
   } catch (IOException e) {
     AutotoolsPlugin.log(e);
   }
 }
 private Map<String, IAConfiguration> getSavedConfigs(IProject project) {
   String projectName = project.getName();
   Map<String, IAConfiguration> list = configs.get(projectName);
   if (list == null) {
     try {
       IPath fileLocation = project.getLocation().append(CFG_FILE_NAME);
       File dirFile = fileLocation.toFile();
       Map<String, IAConfiguration> cfgList = new HashMap<>();
       DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
       DocumentBuilder db = dbf.newDocumentBuilder();
       if (dirFile.exists()) {
         Document d = db.parse(dirFile);
         Element e = d.getDocumentElement();
         // Get the stored configuration data
         NodeList cfgs = e.getElementsByTagName("configuration"); // $NON-NLS-1$
         for (int x = 0; x < cfgs.getLength(); ++x) {
           Node n = cfgs.item(x);
           NamedNodeMap attrs = n.getAttributes();
           // Originally we used the configuration name, but now we use
           // the ConfigurationDescription id which is unique.  Check for
           // id first, but fall back to name for older .autotools files.
           Node nameNode = attrs.getNamedItem("name"); // $NON-NLS-1$
           Node cfgIdNode = attrs.getNamedItem("id"); // $NON-NLS-1$
           String cfgId = null;
           if (cfgIdNode != null) cfgId = cfgIdNode.getNodeValue();
           else if (nameNode != null) {
             String cfgName = nameNode.getNodeValue();
             ICConfigurationDescription cfgd =
                 CoreModel.getDefault()
                     .getProjectDescription(project)
                     .getConfigurationByName(cfgName);
             if (cfgd != null) cfgId = cfgd.getId();
             else continue; // have to punt, this doesn't map to real cfg
           }
           IAConfiguration cfg = new AutotoolsConfiguration(cfgId);
           NodeList l = n.getChildNodes();
           for (int y = 0; y < l.getLength(); ++y) {
             Node child = l.item(y);
             if (child.getNodeName().equals("option")) { // $NON-NLS-1$
               NamedNodeMap optionAttrs = child.getAttributes();
               Node id = optionAttrs.getNamedItem("id"); // $NON-NLS-1$
               Node value = optionAttrs.getNamedItem("value"); // $NON-NLS-1$
               if (id != null && value != null)
                 cfg.setOption(id.getNodeValue(), value.getNodeValue());
             } else if (child.getNodeName().equals("flag")) { // $NON-NLS-1$
               // read in flag values
               NamedNodeMap optionAttrs = child.getAttributes();
               Node id = optionAttrs.getNamedItem("id"); // $NON-NLS-1$
               String idValue = id.getNodeValue();
               IConfigureOption opt = cfg.getOption(idValue);
               if (opt instanceof FlagConfigureOption) {
                 NodeList l2 = child.getChildNodes();
                 for (int z = 0; z < l2.getLength(); ++z) {
                   Node flagChild = l2.item(z);
                   if (flagChild.getNodeName().equals("flagvalue")) { // $NON-NLS-1$
                     NamedNodeMap optionAttrs2 = flagChild.getAttributes();
                     Node id2 = optionAttrs2.getNamedItem("id"); // $NON-NLS-1$
                     Node value = optionAttrs2.getNamedItem("value"); // $NON-NLS-1$
                     cfg.setOption(id2.getNodeValue(), value.getNodeValue());
                   }
                 }
               }
             }
           }
           cfg.setDirty(false);
           cfgList.put(cfg.getId(), cfg);
         }
         if (cfgList.size() > 0) {
           configs.put(projectName, cfgList);
           list = cfgList;
         }
       }
     } catch (ParserConfigurationException | SAXException | IOException e) {
       e.printStackTrace();
     }
   }
   return list;
 }