Package com.intellij.codeInspection.dataFlow

Class NullabilityUtil

java.lang.Object

com.intellij.codeInspection.dataFlow.NullabilityUtil

public class NullabilityUtil
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
NullabilityUtil()

Method Summary

Modifier and Type	Method and Description
static DfaNullability	calcCanBeNull(DfaVariableValue value)
static Nullability	getExpressionNullability(PsiExpression expression)
static Nullability	getExpressionNullability(PsiExpression expression, boolean useDataflow) Tries to determine an expression nullability

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NullabilityUtil

public NullabilityUtil()

Method Detail

calcCanBeNull

public static DfaNullability calcCanBeNull(DfaVariableValue value)

getExpressionNullability

public static Nullability getExpressionNullability(PsiExpression expression)

getExpressionNullability

public static Nullability getExpressionNullability(PsiExpression expression,
                                                   boolean useDataflow)

Tries to determine an expression nullability

Parameters:

expression - an expression to check

useDataflow - whether to use dataflow (more expensive, but may produce more precise result)

Returns:

expression nullability. UNKNOWN if unable to determine; NULLABLE if known to possibly have null value; NOT_NULL if definitely never null.