Package com.intellij.codeInspection.dataFlow

Class CommonDataflow

java.lang.Object

com.intellij.codeInspection.dataFlow.CommonDataflow

public class CommonDataflow
extends java.lang.Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CommonDataflow.DataflowResult Represents the result of dataflow applied to some code fragment (usually a method)

Constructor Summary

Constructors

Constructor and Description
CommonDataflow()

Method Summary

Modifier and Type	Method and Description
static java.lang.Object	computeValue(PsiExpression expression) Returns the value of given expression calculated via dataflow; or null if value is null or unknown.
static CommonDataflow.DataflowResult	getDataflowResult(PsiExpression context) Returns the dataflow result for code fragment which contains given context
static DfType	getDfType(PsiExpression expression)
static LongRangeSet	getExpressionRange(PsiExpression expression) Returns long range set for expression or null if range is unknown.

Methods inherited from class java.lang.Object

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

Constructor Detail

CommonDataflow

public CommonDataflow()

Method Detail

getDataflowResult

public static CommonDataflow.DataflowResult getDataflowResult(PsiExpression context)

Returns the dataflow result for code fragment which contains given context

Parameters:

context - a context to get the dataflow result

Returns:

the dataflow result or null if dataflow cannot be launched for this context (e.g. we are inside too complex method)

getDfType

public static DfType getDfType(PsiExpression expression)

Parameters:

expression - an expression to infer the DfType

Returns:

DfType for that expression. May return DfTypes.TOP if no information from dataflow is known about this expression

getExpressionRange

public static LongRangeSet getExpressionRange(PsiExpression expression)

Returns long range set for expression or null if range is unknown. This method first tries to compute expression using ConstantExpressionEvaluator and only then calls getDfType(PsiExpression).

Parameters:

expression - expression to get its range

Returns:

long range set

computeValue

public static java.lang.Object computeValue(PsiExpression expression)

Returns the value of given expression calculated via dataflow; or null if value is null or unknown.

Parameters:

expression - expression to analyze

Returns:

expression value if known