@Nullable
private static Map<PsiExpression, PsiType> buildDataflowTypeMap(PsiExpression forPlace) {
PsiElement scope = DfaPsiUtil.getTopmostBlockInSameClass(forPlace);
if (scope == null) {
PsiFile file = forPlace.getContainingFile();
if (!(file instanceof PsiCodeFragment)) {
return Collections.emptyMap();
}
scope = file;
}
DataFlowRunner runner =
new DataFlowRunner() {
@NotNull
@Override
protected DfaMemoryState createMemoryState() {
return new ExpressionTypeMemoryState(getFactory());
}
};
final ExpressionTypeInstructionVisitor visitor = new ExpressionTypeInstructionVisitor(forPlace);
if (runner.analyzeMethod(scope, visitor) == RunnerResult.OK) {
return visitor.getResult();
}
return null;
}
@Override
public DfaInstructionState[] visitInstanceof(
InstanceofInstruction instruction, DataFlowRunner runner, DfaMemoryState memState) {
memState.pop();
memState.pop();
memState.push(
new DfaInstanceofValue(
runner.getFactory(), instruction.getLeft(), instruction.getCastType()));
return new DfaInstructionState[] {
new DfaInstructionState(runner.getInstruction(instruction.getIndex() + 1), memState)
};
}
@Override
public DfaInstructionState[] accept(
DataFlowRunner runner, DfaMemoryState stateBefore, InstructionVisitor visitor) {
Instruction nextInstruction = runner.getInstruction(getIndex() + 1);
return new DfaInstructionState[] {new DfaInstructionState(nextInstruction, stateBefore)};
}