edu.umd.cs.findbugs.ba.constant
Class Constant

java.lang.Object
  edu.umd.cs.findbugs.ba.constant.Constant

public class Constant
extends java.lang.Object

Abstract dataflow value representing a value which may or may not be a constant.

Author:

David Hovemeyer

See Also:

ConstantAnalysis

Field Summary

static Constant

NOT_CONSTANT Single instance representing all non-constant values.

Constructor Summary

Constant(java.lang.Object value)
Constructor for a constant value.

Method Summary

boolean	equals(java.lang.Object obj)
int	getConstantInt() Get the constant int value of this value.
java.lang.String	getConstantString() Get the constant String value of this value.
int	hashCode()
boolean	isConstant() Return whether or not this value is a constant.
boolean	isConstantInteger() Return whether or not this value is a constant int/Integer.
boolean	isConstantString() Return whether or not this value is a constant String.
static Constant	merge(Constant a, Constant b) Merge two Constants.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

NOT_CONSTANT

public static final Constant NOT_CONSTANT

Single instance representing all non-constant values.

Constructor Detail

Constant

public Constant(@Nullable
                java.lang.Object value)

Constructor for a constant value.

Parameters:

value - the constant value; must be a String, Integer, etc.

Method Detail

isConstant

public boolean isConstant()

Return whether or not this value is a constant.

Returns:

true if the value is a constant, false if not

isConstantString

public boolean isConstantString()

Return whether or not this value is a constant String.

Returns:

true if the value is a constant String, false if not

getConstantString

public java.lang.String getConstantString()

Get the constant String value of this value.

Returns:

the constant String value

isConstantInteger

public boolean isConstantInteger()

Return whether or not this value is a constant int/Integer.

Returns:

true if the value is a constant int/Integer, false if not

getConstantInt

public int getConstantInt()

Get the constant int value of this value.

Returns:

the constant int value

merge

public static Constant merge(Constant a,
                             Constant b)

Merge two Constants.

Parameters:

a - a Constant

b - another Constant

Returns:

the merge (dataflow meet) of the two Constants

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object