private RefactoringStatus checkExpression() throws JavaModelException {
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;
}
/**
* If the passed node is a method invocation or class creation then return the return type of the
* method based on what is the returned value assigned to.
*
* @param node
* @return return type
*/
private String getReturnType(Expression node) {
ASTNode parent = node.getParent();
if (parent instanceof VariableDeclarationFragment) {
ASTNode grandParent = parent.getParent();
if (grandParent instanceof VariableDeclarationStatement) {
Type typ = ((VariableDeclarationStatement) grandParent).getType();
return removeSpecialSymbols(getFullyQualifiedNameFor(typ.toString()));
}
}
return null;
}