/* bd is a static field declaration or static initializer */
  private static boolean depends(IExpressionFragment selected, BodyDeclaration bd) {
    /* We currently consider selected to depend on bd only if db includes a declaration
     * of a static field on which selected depends.
     *
     * A more accurate strategy might be to also check if bd contains (or is) a
     * static initializer containing code which changes the value of a static field on
     * which selected depends.  However, if a static is written to multiple times within
     * during class initialization, it is difficult to predict which value should be used.
     * This would depend on which value is used by expressions instances for which the new
     * constant will be substituted, and there may be many of these; in each, the
     * static field in question may have taken on a different value (if some of these uses
     * occur within static initializers).
     */

    if (bd instanceof FieldDeclaration) {
      FieldDeclaration fieldDecl = (FieldDeclaration) bd;
      for (Iterator fragments = fieldDecl.fragments().iterator(); fragments.hasNext(); ) {
        VariableDeclarationFragment fragment = (VariableDeclarationFragment) fragments.next();
        SimpleName staticFieldName = fragment.getName();
        if (selected.getSubFragmentsMatching(
                    ASTFragmentFactory.createFragmentForFullSubtree(staticFieldName))
                .length
            != 0) return true;
      }
    }
    return false;
  }
 // !! - like one in ExtractTempRefactoring
 private static boolean canReplace(IASTFragment fragment) {
   ASTNode node = fragment.getAssociatedNode();
   ASTNode parent = node.getParent();
   if (parent instanceof VariableDeclarationFragment) {
     VariableDeclarationFragment vdf = (VariableDeclarationFragment) parent;
     if (node.equals(vdf.getName())) return false;
   }
   if (parent instanceof ExpressionStatement) return false;
   if (parent instanceof SwitchCase) return false;
   return true;
 }
 /*
  * @see ASTVisitor#visit(VariableDeclarationFragment)
  */
 public boolean visit(VariableDeclarationFragment node) {
   node.getName().accept(this);
   for (int i = 0; i < node.getExtraDimensions(); i++) {
     this.fBuffer.append("[]"); // $NON-NLS-1$
   }
   if (node.getInitializer() != null) {
     this.fBuffer.append("="); // $NON-NLS-1$
     node.getInitializer().accept(this);
   }
   return false;
 }
  private void createConstantDeclaration() throws CoreException {
    Type type = getConstantType();

    IExpressionFragment fragment = getSelectedExpression();
    String initializerSource =
        fCu.getBuffer().getText(fragment.getStartPosition(), fragment.getLength());

    AST ast = fCuRewrite.getAST();
    VariableDeclarationFragment variableDeclarationFragment = ast.newVariableDeclarationFragment();
    variableDeclarationFragment.setName(ast.newSimpleName(fConstantName));
    variableDeclarationFragment.setInitializer(
        (Expression)
            fCuRewrite
                .getASTRewrite()
                .createStringPlaceholder(initializerSource, ASTNode.SIMPLE_NAME));

    FieldDeclaration fieldDeclaration = ast.newFieldDeclaration(variableDeclarationFragment);
    fieldDeclaration.setType(type);
    Modifier.ModifierKeyword accessModifier = Modifier.ModifierKeyword.toKeyword(fVisibility);
    if (accessModifier != null) fieldDeclaration.modifiers().add(ast.newModifier(accessModifier));
    fieldDeclaration.modifiers().add(ast.newModifier(Modifier.ModifierKeyword.STATIC_KEYWORD));
    fieldDeclaration.modifiers().add(ast.newModifier(Modifier.ModifierKeyword.FINAL_KEYWORD));

    boolean createComments =
        JavaPreferencesSettings.getCodeGenerationSettings(fCu.getJavaScriptProject())
            .createComments;
    if (createComments) {
      String comment =
          CodeGeneration.getFieldComment(
              fCu, getConstantTypeName(), fConstantName, StubUtility.getLineDelimiterUsed(fCu));
      if (comment != null && comment.length() > 0) {
        JSdoc doc =
            (JSdoc) fCuRewrite.getASTRewrite().createStringPlaceholder(comment, ASTNode.JSDOC);
        fieldDeclaration.setJavadoc(doc);
      }
    }

    AbstractTypeDeclaration parent = getContainingTypeDeclarationNode();
    ListRewrite listRewrite =
        fCuRewrite.getASTRewrite().getListRewrite(parent, parent.getBodyDeclarationsProperty());
    TextEditGroup msg =
        fCuRewrite.createGroupDescription(
            RefactoringCoreMessages.ExtractConstantRefactoring_declare_constant);
    if (insertFirst()) {
      listRewrite.insertFirst(fieldDeclaration, msg);
    } else {
      listRewrite.insertAfter(fieldDeclaration, getNodeToInsertConstantDeclarationAfter(), msg);
    }

    if (fLinkedProposalModel != null) {
      ASTRewrite rewrite = fCuRewrite.getASTRewrite();
      LinkedProposalPositionGroup nameGroup = fLinkedProposalModel.getPositionGroup(KEY_NAME, true);
      nameGroup.addPosition(rewrite.track(variableDeclarationFragment.getName()), true);

      String[] nameSuggestions = guessConstantNames();
      if (nameSuggestions.length > 0 && !nameSuggestions[0].equals(fConstantName)) {
        nameGroup.addProposal(fConstantName, null, nameSuggestions.length + 1);
      }
      for (int i = 0; i < nameSuggestions.length; i++) {
        nameGroup.addProposal(nameSuggestions[i], null, nameSuggestions.length - i);
      }

      LinkedProposalPositionGroup typeGroup = fLinkedProposalModel.getPositionGroup(KEY_TYPE, true);
      typeGroup.addPosition(rewrite.track(type), true);

      ITypeBinding typeBinding = fragment.getAssociatedExpression().resolveTypeBinding();
      if (typeBinding != null) {
        ITypeBinding[] relaxingTypes = ASTResolving.getNarrowingTypes(ast, typeBinding);
        for (int i = 0; i < relaxingTypes.length; i++) {
          typeGroup.addProposal(relaxingTypes[i], fCuRewrite.getCu(), relaxingTypes.length - i);
        }
      }
      ModifierCorrectionSubProcessor.installLinkedVisibilityProposals(
          fLinkedProposalModel, rewrite, fieldDeclaration.modifiers(), false);
    }
  }