private void createNameAndReturnTypeEditors() {
    myNameCodeFragment = new GroovyCodeFragment(myProject, "");
    myNameField =
        new EditorTextField(
            PsiDocumentManager.getInstance(myProject).getDocument(myNameCodeFragment),
            myProject,
            myNameCodeFragment.getFileType());

    final JavaCodeFragmentFactory factory = JavaCodeFragmentFactory.getInstance(myProject);
    myReturnTypeCodeFragment =
        factory.createTypeCodeFragment("", myMethod, true, JavaCodeFragmentFactory.ALLOW_VOID);
    final Document document =
        PsiDocumentManager.getInstance(myProject).getDocument(myReturnTypeCodeFragment);
    myReturnTypeField =
        new EditorTextField(document, myProject, myReturnTypeCodeFragment.getFileType());

    myNameField.setText(myMethod.getName());
    final GrTypeElement element = myMethod.getReturnTypeElementGroovy();
    if (element != null) {
      myReturnTypeField.setText(element.getText());
    }

    myReturnTypeLabel = new JLabel();
    myReturnTypeLabel.setLabelFor(myReturnTypeField);

    myNameLabel = new JLabel();
    myNameLabel.setLabelFor(myNameField);
  }
  public static boolean isMainMethod(GrMethod method) {
    if (!method.getName().equals(MAIN_METHOD)) return false;
    else if (!method.hasModifierProperty(PsiModifier.STATIC)) return false;

    final GrParameter[] parameters = method.getParameters();

    if (parameters.length == 0) return false;
    if (parameters.length == 1 && parameters[0].getTypeElementGroovy() == null) return true;

    int args_count = 0;
    int optional_count = 0;

    for (GrParameter p : parameters) {
      final GrTypeElement declaredType = p.getTypeElementGroovy();
      if ((declaredType == null
              || declaredType.getType().equalsToText(CommonClassNames.JAVA_LANG_STRING + "[]"))
          && p.getInitializerGroovy() == null) {
        args_count++;
      }
      if (p.getInitializerGroovy() != null) optional_count++;
    }

    return optional_count == parameters.length - 1 && args_count == 1;
  }
  private static boolean processPrimaryMethodInner(
      JavaChangeInfo changeInfo, GrMethod method, @Nullable PsiMethod baseMethod) {
    if (changeInfo.isNameChanged()) {
      String newName =
          baseMethod == null
              ? changeInfo.getNewName()
              : RefactoringUtil.suggestNewOverriderName(
                  method.getName(), baseMethod.getName(), changeInfo.getNewName());
      if (newName != null && !newName.equals(method.getName())) {
        method.setName(changeInfo.getNewName());
      }
    }

    final GrModifierList modifierList = method.getModifierList();
    if (changeInfo.isVisibilityChanged()) {
      modifierList.setModifierProperty(changeInfo.getNewVisibility(), true);
    }

    PsiSubstitutor substitutor =
        baseMethod != null ? calculateSubstitutor(method, baseMethod) : PsiSubstitutor.EMPTY;

    final PsiMethod context = changeInfo.getMethod();
    GrTypeElement oldReturnTypeElement = method.getReturnTypeElementGroovy();
    if (changeInfo.isReturnTypeChanged()) {
      CanonicalTypes.Type newReturnType = changeInfo.getNewReturnType();
      if (newReturnType == null) {
        if (oldReturnTypeElement != null) {
          oldReturnTypeElement.delete();
          if (modifierList.getModifiers().length == 0) {
            modifierList.setModifierProperty(GrModifier.DEF, true);
          }
        }
      } else {
        PsiType type = newReturnType.getType(context, method.getManager());
        GrReferenceAdjuster.shortenAllReferencesIn(
            method.setReturnType(substitutor.substitute(type)));
        if (oldReturnTypeElement == null) {
          modifierList.setModifierProperty(GrModifier.DEF, false);
        }
      }
    }

    JavaParameterInfo[] newParameters = changeInfo.getNewParameters();
    final GrParameterList parameterList = method.getParameterList();
    GrParameter[] oldParameters = parameterList.getParameters();
    final PsiParameter[] oldBaseParams =
        baseMethod != null ? baseMethod.getParameterList().getParameters() : null;

    Set<GrParameter> toRemove = new HashSet<GrParameter>(oldParameters.length);
    ContainerUtil.addAll(toRemove, oldParameters);

    GrParameter anchor = null;
    final GrDocComment docComment = method.getDocComment();
    final GrDocTag[] tags = docComment == null ? null : docComment.getTags();

    for (JavaParameterInfo newParameter : newParameters) {
      // if old parameter name differs from base method parameter name we don't change it
      final String newName;
      final int oldIndex = newParameter.getOldIndex();
      if (oldIndex >= 0 && oldBaseParams != null) {
        final String oldName = oldParameters[oldIndex].getName();
        if (oldName.equals(oldBaseParams[oldIndex].getName())) {
          newName = newParameter.getName();
        } else {
          newName = oldName;
        }
      } else {
        newName = newParameter.getName();
      }

      final GrParameter oldParameter = oldIndex >= 0 ? oldParameters[oldIndex] : null;

      if (docComment != null && oldParameter != null) {
        final String oldName = oldParameter.getName();
        for (GrDocTag tag : tags) {
          if ("@param".equals(tag.getName())) {
            final GrDocParameterReference parameterReference = tag.getDocParameterReference();
            if (parameterReference != null && oldName.equals(parameterReference.getText())) {
              parameterReference.handleElementRename(newName);
            }
          }
        }
      }

      GrParameter grParameter =
          createNewParameter(substitutor, context, parameterList, newParameter, newName);
      if (oldParameter != null) {
        grParameter.getModifierList().replace(oldParameter.getModifierList());
      }

      if ("def".equals(newParameter.getTypeText())) {
        grParameter.getModifierList().setModifierProperty(GrModifier.DEF, true);
      } else if (StringUtil.isEmpty(newParameter.getTypeText())) {
        grParameter.getModifierList().setModifierProperty(GrModifier.DEF, false);
      }

      anchor = (GrParameter) parameterList.addAfter(grParameter, anchor);
    }

    for (GrParameter oldParameter : toRemove) {
      oldParameter.delete();
    }
    JavaCodeStyleManager.getInstance(parameterList.getProject())
        .shortenClassReferences(parameterList);
    CodeStyleManager.getInstance(parameterList.getProject()).reformat(parameterList);

    if (changeInfo.isExceptionSetOrOrderChanged()) {
      final ThrownExceptionInfo[] infos = changeInfo.getNewExceptions();
      PsiClassType[] exceptionTypes = new PsiClassType[infos.length];
      for (int i = 0; i < infos.length; i++) {
        ThrownExceptionInfo info = infos[i];
        exceptionTypes[i] = (PsiClassType) info.createType(method, method.getManager());
      }

      PsiReferenceList thrownList =
          GroovyPsiElementFactory.getInstance(method.getProject()).createThrownList(exceptionTypes);
      thrownList = (PsiReferenceList) method.getThrowsList().replace(thrownList);
      JavaCodeStyleManager.getInstance(thrownList.getProject()).shortenClassReferences(thrownList);
      CodeStyleManager.getInstance(method.getProject()).reformat(method.getThrowsList());
    }
    return true;
  }