/**
* @return true if both expressions resolve to the same variable/class or field in the same
* instance of the class
*/
private static boolean sameInstanceReferences(
@Nullable PsiJavaCodeReferenceElement lRef,
@Nullable PsiJavaCodeReferenceElement rRef,
PsiManager manager) {
if (lRef == null && rRef == null) return true;
if (lRef == null || rRef == null) return false;
PsiElement lResolved = lRef.resolve();
PsiElement rResolved = rRef.resolve();
if (!manager.areElementsEquivalent(lResolved, rResolved)) return false;
if (!(lResolved instanceof PsiVariable)) return false;
final PsiVariable variable = (PsiVariable) lResolved;
if (variable.hasModifierProperty(PsiModifier.STATIC)) return true;
final PsiElement lQualifier = lRef.getQualifier();
final PsiElement rQualifier = rRef.getQualifier();
if (lQualifier instanceof PsiJavaCodeReferenceElement
&& rQualifier instanceof PsiJavaCodeReferenceElement) {
return sameInstanceReferences(
(PsiJavaCodeReferenceElement) lQualifier,
(PsiJavaCodeReferenceElement) rQualifier,
manager);
}
if (Comparing.equal(lQualifier, rQualifier)) return true;
boolean lThis =
lQualifier == null
|| lQualifier instanceof PsiThisExpression
|| lQualifier instanceof PsiSuperExpression;
boolean rThis =
rQualifier == null
|| rQualifier instanceof PsiThisExpression
|| rQualifier instanceof PsiSuperExpression;
if (lThis && rThis) {
final PsiJavaCodeReferenceElement llQualifier = getQualifier(lQualifier);
final PsiJavaCodeReferenceElement rrQualifier = getQualifier(rQualifier);
return sameInstanceReferences(llQualifier, rrQualifier, manager);
}
return false;
}
