prefuse.data.expression
Class ArithmeticExpression

java.lang.Object
  prefuse.data.expression.AbstractExpression
      prefuse.data.expression.BinaryExpression
          prefuse.data.expression.ArithmeticExpression

All Implemented Interfaces:

java.util.EventListener, ExpressionListener, Expression

public class ArithmeticExpression
extends BinaryExpression

Expression supporting basic arithmetic: add, subtract, multiply, divide, exponentiate (pow), and modulo (%).

Author:

jeffrey heer

Field Summary

static int	ADD Indicates an addition operation.
static int	DIV Indicates a division operation.
static int	MOD Indicates a modulo operation.
static int	MUL Indicates a multiplication operation.
static int	POW Indicates an exponentiation (pow) operation.
static int	SUB Indicates a subtraction operation.

Fields inherited from class prefuse.data.expression.BinaryExpression

m_left, m_op, m_right

Constructor Summary

ArithmeticExpression(int operation, Expression left, Expression right)
Create a new ArithmeticExpression.

Method Summary

java.lang.Object	get(Tuple t) By default, throws an UnsupportedOperationException.
double	getDouble(Tuple t) By default, throws an UnsupportedOperationException.
float	getFloat(Tuple t) By default, throws an UnsupportedOperationException.
int	getInt(Tuple t) By default, throws an UnsupportedOperationException.
long	getLong(Tuple t) 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.BinaryExpression

addChildListeners, getLeftExpression, getOperation, getRightExpression, removeChildListeners, setLeftExpression, setRightExpression, visit

Methods inherited from class prefuse.data.expression.AbstractExpression

addExpressionListener, expressionChanged, fireExpressionChange, getBoolean, hasListeners, removeExpressionListener

Methods inherited from class java.lang.Object

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

Field Detail

ADD

public static final int ADD

Indicates an addition operation.

See Also:

Constant Field Values

SUB

public static final int SUB

Indicates a subtraction operation.

See Also:

Constant Field Values

MUL

public static final int MUL

Indicates a multiplication operation.

See Also:

Constant Field Values

DIV

public static final int DIV

Indicates a division operation.

See Also:

Constant Field Values

POW

public static final int POW

Indicates an exponentiation (pow) operation.

See Also:

Constant Field Values

MOD

public static final int MOD

Indicates a modulo operation.

See Also:

Constant Field Values

Constructor Detail

ArithmeticExpression

public ArithmeticExpression(int operation,
                            Expression left,
                            Expression right)

Create a new ArithmeticExpression.

Parameters:

operation - the operation to perform

left - the left sub-expression

right - the right sub-expression

Method Detail

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.

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)

getInt

public int getInt(Tuple t)

Description copied from class: AbstractExpression

By default, throws an UnsupportedOperationException.

Specified by:

getInt in interface Expression

Overrides:

getInt in class AbstractExpression

Parameters:

t - the input Tuple

Returns:

the Expression return value, as an int

See Also:

Expression.getInt(prefuse.data.Tuple)

getLong

public long getLong(Tuple t)

Description copied from class: AbstractExpression

By default, throws an UnsupportedOperationException.

Specified by:

getLong in interface Expression

Overrides:

getLong in class AbstractExpression

Parameters:

t - the input Tuple

Returns:

the Expression return value, as a long

See Also:

Expression.getLong(prefuse.data.Tuple)

getFloat

public float getFloat(Tuple t)

Description copied from class: AbstractExpression

By default, throws an UnsupportedOperationException.

Specified by:

getFloat in interface Expression

Overrides:

getFloat in class AbstractExpression

Parameters:

t - the input Tuple

Returns:

the Expression return value, as a float

See Also:

Expression.getFloat(prefuse.data.Tuple)

getDouble

public double getDouble(Tuple t)

Description copied from class: AbstractExpression

By default, throws an UnsupportedOperationException.

Specified by:

getDouble in interface Expression

Overrides:

getDouble in class AbstractExpression

Parameters:

t - the input Tuple

Returns:

the Expression return value, as a double

See Also:

Expression.getDouble(prefuse.data.Tuple)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

See Also:

Object.toString()