private void runTransformingCompilers(final ModuleChunk chunk) {
    final JavaSourceTransformingCompiler[] transformers =
        CompilerManager.getInstance(myProject).getCompilers(JavaSourceTransformingCompiler.class);
    if (transformers.length == 0) {
      return;
    }
    if (LOG.isDebugEnabled()) {
      LOG.debug("Running transforming compilers...");
    }
    final Module[] modules = chunk.getModules();
    for (final JavaSourceTransformingCompiler transformer : transformers) {
      final Map<VirtualFile, VirtualFile> originalToCopyFileMap =
          new HashMap<VirtualFile, VirtualFile>();
      final Application application = ApplicationManager.getApplication();
      application.invokeAndWait(
          new Runnable() {
            public void run() {
              for (final Module module : modules) {
                for (final VirtualFile file : chunk.getFilesToCompile(module)) {
                  final VirtualFile untransformed = chunk.getOriginalFile(file);
                  if (transformer.isTransformable(untransformed)) {
                    application.runWriteAction(
                        new Runnable() {
                          public void run() {
                            try {
                              // if untransformed != file, the file is already a (possibly
                              // transformed) copy of the original 'untransformed' file.
                              // If this is the case, just use already created copy and do not copy
                              // file content once again
                              final VirtualFile fileCopy =
                                  untransformed.equals(file)
                                      ? createFileCopy(getTempDir(module), file)
                                      : file;
                              originalToCopyFileMap.put(file, fileCopy);
                            } catch (IOException e) {
                              // skip it
                            }
                          }
                        });
                  }
                }
              }
            }
          },
          myCompileContext.getProgressIndicator().getModalityState());

      // do actual transform
      for (final Module module : modules) {
        final List<VirtualFile> filesToCompile = chunk.getFilesToCompile(module);
        for (int j = 0; j < filesToCompile.size(); j++) {
          final VirtualFile file = filesToCompile.get(j);
          final VirtualFile fileCopy = originalToCopyFileMap.get(file);
          if (fileCopy != null) {
            final boolean ok =
                transformer.transform(myCompileContext, fileCopy, chunk.getOriginalFile(file));
            if (ok) {
              chunk.substituteWithTransformedVersion(module, j, fileCopy);
            }
          }
        }
      }
    }
  }