private DfaValue popQualifier(
MethodCallInstruction instruction, DataFlowRunner runner, DfaMemoryState memState) {
@NotNull final DfaValue qualifier = memState.pop();
boolean unboxing = instruction.getMethodType() == MethodCallInstruction.MethodType.UNBOXING;
NullabilityProblem problem =
unboxing ? NullabilityProblem.unboxingNullable : NullabilityProblem.callNPE;
PsiExpression anchor = unboxing ? instruction.getContext() : instruction.getCallExpression();
if (!checkNotNullable(memState, qualifier, problem, anchor)) {
forceNotNull(runner, memState, qualifier);
}
return qualifier;
}
@NotNull
private DfaValue getMethodResultValue(
MethodCallInstruction instruction,
@Nullable DfaValue qualifierValue,
DfaValueFactory factory) {
DfaValue precalculated = instruction.getPrecalculatedReturnValue();
if (precalculated != null) {
return precalculated;
}
final PsiType type = instruction.getResultType();
final MethodCallInstruction.MethodType methodType = instruction.getMethodType();
if (methodType == MethodCallInstruction.MethodType.UNBOXING) {
return factory.getBoxedFactory().createUnboxed(qualifierValue);
}
if (methodType == MethodCallInstruction.MethodType.BOXING) {
DfaValue boxed = factory.getBoxedFactory().createBoxed(qualifierValue);
return boxed == null ? factory.createTypeValue(type, Nullness.NOT_NULL) : boxed;
}
if (methodType == MethodCallInstruction.MethodType.CAST) {
assert qualifierValue != null;
if (qualifierValue instanceof DfaConstValue) {
Object casted =
TypeConversionUtil.computeCastTo(((DfaConstValue) qualifierValue).getValue(), type);
return factory
.getConstFactory()
.createFromValue(casted, type, ((DfaConstValue) qualifierValue).getConstant());
}
return qualifierValue;
}
if (type != null && (type instanceof PsiClassType || type.getArrayDimensions() > 0)) {
Nullness nullability = myReturnTypeNullability.get(instruction);
if (nullability == Nullness.UNKNOWN && factory.isUnknownMembersAreNullable()) {
nullability = Nullness.NULLABLE;
}
return factory.createTypeValue(type, nullability);
}
return DfaUnknownValue.getInstance();
}