private RefactoringStatus checkExpression() throws JavaScriptModelException {
RefactoringStatus result = new RefactoringStatus();
result.merge(checkExpressionBinding());
if (result.hasFatalError()) return result;
checkAllStaticFinal();
IExpressionFragment selectedExpression = getSelectedExpression();
Expression associatedExpression = selectedExpression.getAssociatedExpression();
if (associatedExpression instanceof NullLiteral)
result.merge(
RefactoringStatus.createFatalErrorStatus(
RefactoringCoreMessages.ExtractConstantRefactoring_null_literals));
else if (!ConstantChecks.isLoadTimeConstant(selectedExpression))
result.merge(
RefactoringStatus.createFatalErrorStatus(
RefactoringCoreMessages.ExtractConstantRefactoring_not_load_time_constant));
else if (associatedExpression instanceof SimpleName) {
if (associatedExpression.getParent() instanceof QualifiedName
&& associatedExpression.getLocationInParent() == QualifiedName.NAME_PROPERTY
|| associatedExpression.getParent() instanceof FieldAccess
&& associatedExpression.getLocationInParent() == FieldAccess.NAME_PROPERTY)
return RefactoringStatus.createFatalErrorStatus(
RefactoringCoreMessages.ExtractConstantRefactoring_select_expression);
}
return result;
}
/*
* @see ASTVisitor#visit(ConstructorInvocation)
*/
public boolean visit(ConstructorInvocation node) {
if (node.getAST().apiLevel() >= AST.JLS3) {
if (!node.typeArguments().isEmpty()) {
this.fBuffer.append("<"); // $NON-NLS-1$
for (Iterator it = node.typeArguments().iterator(); it.hasNext(); ) {
Type t = (Type) it.next();
t.accept(this);
if (it.hasNext()) {
this.fBuffer.append(","); // $NON-NLS-1$
}
}
this.fBuffer.append(">"); // $NON-NLS-1$
}
}
this.fBuffer.append("this("); // $NON-NLS-1$
for (Iterator it = node.arguments().iterator(); it.hasNext(); ) {
Expression e = (Expression) it.next();
e.accept(this);
if (it.hasNext()) {
this.fBuffer.append(","); // $NON-NLS-1$
}
}
this.fBuffer.append(");"); // $NON-NLS-1$
return false;
}
/*
* @see ASTVisitor#visit(FunctionInvocation)
*/
public boolean visit(FunctionInvocation node) {
if (node.getExpression() != null) {
node.getExpression().accept(this);
this.fBuffer.append("."); // $NON-NLS-1$
}
if (node.getAST().apiLevel() >= AST.JLS3) {
if (!node.typeArguments().isEmpty()) {
this.fBuffer.append("<"); // $NON-NLS-1$
for (Iterator it = node.typeArguments().iterator(); it.hasNext(); ) {
Type t = (Type) it.next();
t.accept(this);
if (it.hasNext()) {
this.fBuffer.append(","); // $NON-NLS-1$
}
}
this.fBuffer.append(">"); // $NON-NLS-1$
}
}
SimpleName name = node.getName();
if (name != null) name.accept(this);
this.fBuffer.append("("); // $NON-NLS-1$
for (Iterator it = node.arguments().iterator(); it.hasNext(); ) {
Expression e = (Expression) it.next();
e.accept(this);
if (it.hasNext()) {
this.fBuffer.append(","); // $NON-NLS-1$
}
}
this.fBuffer.append(")"); // $NON-NLS-1$
return false;
}
public boolean visit(ListExpression node) {
for (Iterator it = node.expressions().iterator(); it.hasNext(); ) {
Expression e = (Expression) it.next();
e.accept(this);
if (it.hasNext()) {
this.fBuffer.append(","); // $NON-NLS-1$
}
}
return false;
}
/*
* @see ASTVisitor#visit(ArrayInitializer)
*/
public boolean visit(ArrayInitializer node) {
this.fBuffer.append("["); // $NON-NLS-1$
for (Iterator it = node.expressions().iterator(); it.hasNext(); ) {
Expression e = (Expression) it.next();
e.accept(this);
if (it.hasNext()) {
this.fBuffer.append(","); // $NON-NLS-1$
}
}
this.fBuffer.append("]"); // $NON-NLS-1$
return false;
}
public boolean visit(FunctionInvocation node) {
Expression receiver = node.getExpression();
if (receiver == null) {
SimpleName name = node.getName();
if (fIgnoreBinding == null
|| (name != null && !Bindings.equals(fIgnoreBinding, name.resolveBinding())))
node.getName().accept(this);
} else {
receiver.accept(this);
}
accept(node.arguments());
return false;
}
/*
* @see ASTVisitor#visit(InfixExpression)
*/
public boolean visit(InfixExpression node) {
node.getLeftOperand().accept(this);
this.fBuffer.append(' '); // for cases like x= i - -1; or x= i++ + ++i;
this.fBuffer.append(node.getOperator().toString());
this.fBuffer.append(' ');
node.getRightOperand().accept(this);
final List extendedOperands = node.extendedOperands();
if (extendedOperands.size() != 0) {
this.fBuffer.append(' ');
for (Iterator it = extendedOperands.iterator(); it.hasNext(); ) {
this.fBuffer.append(node.getOperator().toString()).append(' ');
Expression e = (Expression) it.next();
e.accept(this);
}
}
return false;
}
// !!! -- same as in ExtractTempRefactoring
private boolean isLiteralNodeSelected() throws JavaScriptModelException {
IExpressionFragment fragment = getSelectedExpression();
if (fragment == null) return false;
Expression expression = fragment.getAssociatedExpression();
if (expression == null) return false;
switch (expression.getNodeType()) {
case ASTNode.BOOLEAN_LITERAL:
case ASTNode.CHARACTER_LITERAL:
case ASTNode.NULL_LITERAL:
case ASTNode.NUMBER_LITERAL:
case ASTNode.UNDEFINED_LITERAL:
case ASTNode.REGULAR_EXPRESSION_LITERAL:
return true;
default:
return false;
}
}
/*
* @see ASTVisitor#visit(ForStatement)
*/
public boolean visit(ForStatement node) {
this.fBuffer.append("for ("); // $NON-NLS-1$
for (Iterator it = node.initializers().iterator(); it.hasNext(); ) {
Expression e = (Expression) it.next();
e.accept(this);
}
this.fBuffer.append("; "); // $NON-NLS-1$
if (node.getExpression() != null) {
node.getExpression().accept(this);
}
this.fBuffer.append("; "); // $NON-NLS-1$
for (Iterator it = node.updaters().iterator(); it.hasNext(); ) {
Expression e = (Expression) it.next();
e.accept(this);
}
this.fBuffer.append(") "); // $NON-NLS-1$
node.getBody().accept(this);
return false;
}
/**
* @return proposed variable names (may be empty, but not null). The first proposal should be used
* as "best guess" (if it exists).
*/
public String[] guessConstantNames() {
if (fGuessedConstNames == null) {
try {
Expression expression = getSelectedExpression().getAssociatedExpression();
if (expression != null) {
ITypeBinding binding = expression.resolveTypeBinding();
fGuessedConstNames =
StubUtility.getVariableNameSuggestions(
StubUtility.CONSTANT_FIELD,
fCu.getJavaScriptProject(),
binding,
expression,
Arrays.asList(getExcludedVariableNames()));
}
} catch (JavaScriptModelException e) {
}
if (fGuessedConstNames == null) fGuessedConstNames = new String[0];
}
return fGuessedConstNames;
}
/*
* @see ASTVisitor#visit(ArrayCreation)
*/
public boolean visit(ArrayCreation node) {
this.fBuffer.append("new "); // $NON-NLS-1$
ArrayType at = node.getType();
int dims = at.getDimensions();
Type elementType = at.getElementType();
elementType.accept(this);
for (Iterator it = node.dimensions().iterator(); it.hasNext(); ) {
this.fBuffer.append("["); // $NON-NLS-1$
Expression e = (Expression) it.next();
e.accept(this);
this.fBuffer.append("]"); // $NON-NLS-1$
dims--;
}
// add empty "[]" for each extra array dimension
for (int i = 0; i < dims; i++) {
this.fBuffer.append("[]"); // $NON-NLS-1$
}
if (node.getInitializer() != null) {
node.getInitializer().accept(this);
}
return false;
}
/*
* @see ASTVisitor#visit(ClassInstanceCreation)
*/
public boolean visit(ClassInstanceCreation node) {
if (node.getExpression() != null) {
node.getExpression().accept(this);
this.fBuffer.append("."); // $NON-NLS-1$
}
this.fBuffer.append("new "); // $NON-NLS-1$
// if (node.getAST().apiLevel() == AST.JLS2) {
// node.getName().accept(this);
// }
// if (node.getAST().apiLevel() >= AST.JLS3) {
// if (!node.typeArguments().isEmpty()) {
// this.fBuffer.append("<");//$NON-NLS-1$
// for (Iterator it= node.typeArguments().iterator(); it.hasNext();) {
// Type t= (Type) it.next();
// t.accept(this);
// if (it.hasNext()) {
// this.fBuffer.append(",");//$NON-NLS-1$
// }
// }
// this.fBuffer.append(">");//$NON-NLS-1$
// }
// node.getType().accept(this);
// }
node.getMember().accept(this);
this.fBuffer.append("("); // $NON-NLS-1$
for (Iterator it = node.arguments().iterator(); it.hasNext(); ) {
Expression e = (Expression) it.next();
e.accept(this);
if (it.hasNext()) {
this.fBuffer.append(","); // $NON-NLS-1$
}
}
this.fBuffer.append(")"); // $NON-NLS-1$
if (node.getAnonymousClassDeclaration() != null) {
node.getAnonymousClassDeclaration().accept(this);
}
return false;
}
private static boolean isStringExpression(Expression expression) {
ITypeBinding binding = expression.resolveTypeBinding();
return binding.getQualifiedName().equals("String"); // $NON-NLS-1$
}