@Override
public boolean isNotNull(DfaValue dfaVar) {
if (dfaVar instanceof DfaConstValue) return ((DfaConstValue) dfaVar).getValue() != null;
if (dfaVar instanceof DfaBoxedValue) return true;
if (dfaVar instanceof DfaTypeValue) return ((DfaTypeValue) dfaVar).isNotNull();
if (dfaVar instanceof DfaVariableValue) {
if (getVariableState((DfaVariableValue) dfaVar).isNotNull()) return true;
DfaConstValue constantValue = getConstantValue((DfaVariableValue) dfaVar);
if (constantValue != null && constantValue.getValue() != null) return true;
}
DfaConstValue dfaNull = myFactory.getConstFactory().getNull();
int c1Index = getEqClassIndex(dfaVar);
int c2Index = getEqClassIndex(dfaNull);
if (c1Index < 0 || c2Index < 0) {
return false;
}
long[] pairs = myDistinctClasses.toArray();
for (long pair : pairs) {
if (c1Index == low(pair) && c2Index == high(pair)
|| c1Index == high(pair) && c2Index == low(pair)) {
return true;
}
}
return false;
}
private boolean applyRelation(
@NotNull final DfaValue dfaLeft, @NotNull final DfaValue dfaRight, boolean isNegated) {
if (isUnknownState(dfaLeft) || isUnknownState(dfaRight)) {
return true;
}
// DfaConstValue || DfaVariableValue
Integer c1Index = getOrCreateEqClassIndex(dfaLeft);
Integer c2Index = getOrCreateEqClassIndex(dfaRight);
if (c1Index == null || c2Index == null) {
return true;
}
if (!isNegated) { // Equals
if (c1Index.equals(c2Index) || areCompatibleConstants(c1Index, c2Index)) return true;
if (!uniteClasses(c1Index, c2Index)) return false;
for (long encodedPair : myDistinctClasses.toArray()) {
EqClass c1 = myEqClasses.get(low(encodedPair));
EqClass c2 = myEqClasses.get(high(encodedPair));
DfaConstValue const1 = (DfaConstValue) c1.findConstant(false);
DfaConstValue const2 = (DfaConstValue) c2.findConstant(false);
if (const1 != null
&& const2 != null
&& !preserveConstantDistinction(const1.getValue(), const2.getValue())) {
myDistinctClasses.remove(encodedPair);
}
}
myCachedDistinctClassPairs = null;
myCachedNonTrivialEqClasses = null;
myCachedHash = null;
} else { // Not Equals
if (c1Index.equals(c2Index) || areCompatibleConstants(c1Index, c2Index)) return false;
if (isNull(dfaLeft) && isPrimitive(dfaRight) || isNull(dfaRight) && isPrimitive(dfaLeft))
return true;
makeClassesDistinct(c1Index, c2Index);
myCachedDistinctClassPairs = null;
myCachedHash = null;
}
return true;
}
private static boolean cacheable(@NotNull DfaConstValue dfaConstValue) {
Object value = dfaConstValue.getValue();
return box(value) == box(value);
}