com.satline.expr
Class BooleanConstant

java.lang.Object
  com.satline.expr.BooleanConstant

All Implemented Interfaces:

Constant, Expression, java.io.Serializable

public class BooleanConstant
extends java.lang.Object
implements Constant

Definition of boolean constant expression.

Author:

Teubner

See Also:

Serialized Form

Field Summary

static BooleanConstant	FALSE
static BooleanConstant	TRUE

Constructor Summary

BooleanConstant()
Default constructor.

Method Summary

boolean	equals(java.lang.Object obj) Compares this object against the specified object.
static BooleanConstant	getInstance(boolean value) Return boolean constant.
java.lang.Boolean	getValue() Get value.
<E,F> E	greet(ExpressionWalker<E,F> visitor, F arg) Handle visit of ExpressionWalker.
int	hashCode()
void	setValue(java.lang.Boolean value) Set value.
java.lang.String	toString() Get string representation.

Methods inherited from class java.lang.Object

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

Field Detail

FALSE

public static final BooleanConstant FALSE

TRUE

public static final BooleanConstant TRUE

Constructor Detail

BooleanConstant

public BooleanConstant()

Default constructor.

Method Detail

getInstance

public static BooleanConstant getInstance(boolean value)

Return boolean constant.

Parameters:

value - value of constant

Returns:

the constant

getValue

public java.lang.Boolean getValue()

Get value.

Returns:

value.

setValue

public void setValue(java.lang.Boolean value)

Set value.

Parameters:

value - - string value.

greet

public <E,F> E greet(ExpressionWalker<E,F> visitor,
                     F arg)
        throws ExpressionException

Handle visit of ExpressionWalker.

Specified by:

greet in interface Expression

Parameters:

visitor - - the ExpressionWalker visiting this object

arg - - implementation dependent argument

Returns:

implementation dependent result

Throws:

ExpressionException

toString

public java.lang.String toString()

Get string representation.

Overrides:

toString in class java.lang.Object

Returns:

string representation

equals

public boolean equals(java.lang.Object obj)

Compares this object against the specified object. The result is true if and only if the argument is not null and is a StringConstant object with equal value as this object.

Overrides:

equals in class java.lang.Object

Parameters:

obj - - object to compare with

Returns:

true if the objects are the same, false otherwise

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object