prefuse.visual.expression
Class GroupSizeFunction

java.lang.Object
  prefuse.data.expression.AbstractExpression
      prefuse.visual.expression.GroupExpression
          prefuse.visual.expression.GroupSizeFunction

All Implemented Interfaces:

java.util.EventListener, ExpressionListener, Expression, Function

public class GroupSizeFunction
extends GroupExpression

GroupExpression that returns the size of a data group.

Author:

jeffrey heer

Field Summary

Fields inherited from class prefuse.visual.expression.GroupExpression

m_group

Fields inherited from interface prefuse.data.expression.Function

VARARGS

Constructor Summary

GroupSizeFunction()
Create a new, uninitialized GroupSizeFunction.

GroupSizeFunction(java.lang.String group)
Create a new GroupSizeFunction using the given data group name as the Function parameter.

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.String	getName() Get the name of this function.
java.lang.Class	getType(Schema s) Returns the type that this expression evaluates to when tuples with the given Schema are provided as input.

Methods inherited from class prefuse.visual.expression.GroupExpression

addParameter, getGroup, getParameterCount, toString

Methods inherited from class prefuse.data.expression.AbstractExpression

addChildListeners, addExpressionListener, expressionChanged, fireExpressionChange, getBoolean, 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, getBoolean, removeExpressionListener, visit

Constructor Detail

GroupSizeFunction

public GroupSizeFunction()

Create a new, uninitialized GroupSizeFunction. The parameter for this Function needs to be set.

GroupSizeFunction

public GroupSizeFunction(java.lang.String group)

Create a new GroupSizeFunction using the given data group name as the Function parameter.

Parameters:

group - the data group name to use as a parameter

Method Detail

getName

public java.lang.String getName()

Description copied from interface: Function

Get the name of this function.

Returns:

the function name

See Also:

Function.getName()

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)

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)

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)

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)