@Nullable
private static PsiExpression createDefaultValue(
JavaChangeInfo changeInfo,
final PsiElementFactory factory,
final JavaParameterInfo info,
final PsiExpressionList list)
throws IncorrectOperationException {
if (info.isUseAnySingleVariable()) {
final PsiResolveHelper resolveHelper =
JavaPsiFacade.getInstance(list.getProject()).getResolveHelper();
final PsiType type = info.getTypeWrapper().getType(changeInfo.getMethod(), list.getManager());
final VariablesProcessor processor =
new VariablesProcessor(false) {
protected boolean check(PsiVariable var, ResolveState state) {
if (var instanceof PsiField
&& !resolveHelper.isAccessible((PsiField) var, list, null)) return false;
if (var instanceof PsiLocalVariable
&& list.getTextRange().getStartOffset() <= var.getTextRange().getStartOffset())
return false;
if (PsiTreeUtil.isAncestor(var, list, false)) return false;
final PsiType varType = state.get(PsiSubstitutor.KEY).substitute(var.getType());
return type.isAssignableFrom(varType);
}
public boolean execute(PsiElement pe, ResolveState state) {
super.execute(pe, state);
return size() < 2;
}
};
PsiScopesUtil.treeWalkUp(processor, list, null);
if (processor.size() == 1) {
final PsiVariable result = processor.getResult(0);
return factory.createExpressionFromText(result.getName(), list);
}
if (processor.size() == 0) {
final PsiClass parentClass = PsiTreeUtil.getParentOfType(list, PsiClass.class);
if (parentClass != null) {
PsiClass containingClass = parentClass;
final Set<PsiClass> containingClasses = new HashSet<PsiClass>();
while (containingClass != null) {
if (type.isAssignableFrom(factory.createType(containingClass, PsiSubstitutor.EMPTY))) {
containingClasses.add(containingClass);
}
containingClass = PsiTreeUtil.getParentOfType(containingClass, PsiClass.class);
}
if (containingClasses.size() == 1) {
return RefactoringUtil.createThisExpression(
parentClass.getManager(),
containingClasses.contains(parentClass)
? null
: containingClasses.iterator().next());
}
}
}
}
final PsiCallExpression callExpression =
PsiTreeUtil.getParentOfType(list, PsiCallExpression.class);
final String defaultValue = info.getDefaultValue();
return callExpression != null
? info.getValue(callExpression)
: defaultValue.length() > 0 ? factory.createExpressionFromText(defaultValue, list) : null;
}
