prefuse.data.expression
Class BooleanLiteral

java.lang.Object
  prefuse.data.expression.AbstractExpression
      prefuse.data.expression.Literal
          prefuse.data.expression.BooleanLiteral

All Implemented Interfaces:

java.util.EventListener, ExpressionListener, Expression, Predicate

public class BooleanLiteral
extends Literal
implements Predicate

Literal expression of a boolean value.

Author:

jeffrey heer

Field Summary

static BooleanLiteral	FALSE The false boolean literal.
static BooleanLiteral	TRUE The true boolean literal.

Constructor Summary

BooleanLiteral(boolean b)
Create a new BooleanLiteral.

Method Summary

java.lang.Object	get(Tuple t) By default, throws an UnsupportedOperationException.
boolean	getBoolean(Tuple tuple) By default, throws an UnsupportedOperationException.
java.lang.Class	getType(Schema s) Returns the type that this expression evaluates to when tuples with the given Schema are provided as input.
java.lang.String	toString()

Methods inherited from class prefuse.data.expression.Literal

getLiteral, getLiteral, getLiteral

Methods inherited from class prefuse.data.expression.AbstractExpression

addChildListeners, addExpressionListener, expressionChanged, fireExpressionChange, getDouble, getFloat, getInt, getLong, hasListeners, removeChildListeners, removeExpressionListener, visit

Methods inherited from class java.lang.Object

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

Methods inherited from interface prefuse.data.expression.Expression

addExpressionListener, getDouble, getFloat, getInt, getLong, removeExpressionListener, visit

Field Detail

TRUE

public static final BooleanLiteral TRUE

The true boolean literal.

FALSE

public static final BooleanLiteral FALSE

The false boolean literal.

Constructor Detail

BooleanLiteral

public BooleanLiteral(boolean b)

Create a new BooleanLiteral.

Parameters:

b - the boolean value

Method Detail

getBoolean

public boolean getBoolean(Tuple tuple)

Description copied from class: AbstractExpression

By default, throws an UnsupportedOperationException.

Specified by:

getBoolean in interface Expression

Overrides:

getBoolean in class AbstractExpression

Parameters:

tuple - the input Tuple

Returns:

the Expression return value, as a boolean

See Also:

Expression.getBoolean(prefuse.data.Tuple)

getType

public java.lang.Class getType(Schema s)

Description copied from interface: Expression

Returns the type that this expression evaluates to when tuples with the given Schema are provided as input.

Specified by:

getType in interface Expression

See Also:

Expression.getType(prefuse.data.Schema)

get

public java.lang.Object get(Tuple t)

Description copied from class: AbstractExpression

By default, throws an UnsupportedOperationException.

Specified by:

get in interface Expression

Overrides:

get in class AbstractExpression

Parameters:

t - the input Tuple

Returns:

the Expression return value, as an Object

See Also:

Expression.get(prefuse.data.Tuple)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

See Also:

Object.toString()