Package edu.umd.cs.findbugs.ba.jsr305

Enum FlowValue

java.lang.Object

java.lang.Enum<FlowValue>

edu.umd.cs.findbugs.ba.jsr305.FlowValue

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<FlowValue>

public enum FlowValue
extends java.lang.Enum<FlowValue>

Flow value type for type qualifier dataflow analysis.

Author:

David Hovemeyer

Enum Constant Summary

Enum Constants

Enum Constant	Description
ALWAYS
NEVER
TOP
UNKNOWN

Method Summary

Modifier and Type	Method	Description
static boolean	backwardsValueConflictsWithSource(FlowValue backwardsFlowValue, SourceSinkInfo source, TypeQualifierValue typeQualifierValue, boolean isIdentity)	Determine whether given backwards FlowValue conflicts with given source.
static FlowValue	flowValueFromWhen(javax.annotation.meta.When when)	Convert a When value to a FlowValue value.
boolean	isNo()
boolean	isUncertain()
boolean	isYes()
static FlowValue	meet(FlowValue a, FlowValue b)
static FlowValue	valueOf(java.lang.String name)	Returns the enum constant of this type with the specified name.
static FlowValue[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.
static boolean	valuesConflict(boolean strictChecking, FlowValue forward, FlowValue backward)	Determine whether given flow values conflict.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

TOP

public static final FlowValue TOP

ALWAYS

public static final FlowValue ALWAYS

NEVER

public static final FlowValue NEVER

UNKNOWN

public static final FlowValue UNKNOWN

Method Detail

values

public static FlowValue[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (FlowValue c : FlowValue.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static FlowValue valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null

isYes

public boolean isYes()

isUncertain

public boolean isUncertain()

isNo

public boolean isNo()

meet

public static final FlowValue meet(FlowValue a,
                                   FlowValue b)

valuesConflict

public static boolean valuesConflict(boolean strictChecking,
                                     FlowValue forward,
                                     FlowValue backward)

Determine whether given flow values conflict.

Parameters:

forward - a forwards flow value

backward - a backwards flow value

Returns:

true if values conflict, false otherwise

flowValueFromWhen

public static FlowValue flowValueFromWhen(javax.annotation.meta.When when)

Convert a When value to a FlowValue value.

Parameters:

when - a When value

Returns:

the corresponding FlowValue

backwardsValueConflictsWithSource

public static boolean backwardsValueConflictsWithSource(FlowValue backwardsFlowValue,
                                                        SourceSinkInfo source,
                                                        TypeQualifierValue typeQualifierValue,
                                                        boolean isIdentity)

Determine whether given backwards FlowValue conflicts with given source.

Parameters:

backwardsFlowValue - a backwards FlowValue

source - SourceSinkInfo object representing a source reached by the backwards flow value

typeQualifierValue - TypeQualifierValue being checked

isIdentity - TODO

Returns:

true if backwards value conflicts with source, false if not