prefuse.data.expression
Class CompositePredicate

java.lang.Object
  prefuse.data.expression.AbstractExpression
      prefuse.data.expression.AbstractPredicate
          prefuse.data.expression.CompositePredicate

All Implemented Interfaces:

java.util.EventListener, ExpressionListener, Expression, Predicate

Direct Known Subclasses:

AndPredicate, OrPredicate, XorPredicate

public abstract class CompositePredicate
extends AbstractPredicate

Abstract base class for Predicate instances that maintain one or more sub-predicates (clauses).

Author:

jeffrey heer

Field Summary

protected java.util.ArrayList

m_clauses

Constructor Summary

CompositePredicate()
Create a new, empty CompositePredicate.

CompositePredicate(Predicate p1, Predicate p2)
Create a new CompositePredicate.

Method Summary

void	add(Predicate p) Add a new clause.
protected void	addChildListeners() Add child listeners to catch and propagate sub-expression updates.
void	clear() Remove all clauses.
Predicate	get(int idx) Get the sub-predicate at the given index.
Predicate	getSubPredicate(Predicate p) Get a predicate instance just like this one but without the given predicate as a clause.
boolean	remove(Predicate p) Remove a new clause.
protected void	removeChildListeners() Remove child listeners for sub-expression updates.
void	set(Predicate p) Set the given predicate to be the only clause of thie composite.
void	set(Predicate[] p) Set the given predicates to be the clauses of thie composite.
int	size() Get the number of sub-predicate clauses.
protected java.lang.String	toString(java.lang.String op) Return a String representation of this predicate.
void	visit(ExpressionVisitor v) Passes the visitor through this expression and any sub expressions

Methods inherited from class prefuse.data.expression.AbstractPredicate

get, getType

Methods inherited from class prefuse.data.expression.AbstractExpression

addExpressionListener, expressionChanged, fireExpressionChange, getBoolean, getDouble, getFloat, getInt, getLong, hasListeners, removeExpressionListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface prefuse.data.expression.Expression

addExpressionListener, getBoolean, getDouble, getFloat, getInt, getLong, removeExpressionListener

Field Detail

m_clauses

protected java.util.ArrayList m_clauses

Constructor Detail

CompositePredicate

public CompositePredicate()

Create a new, empty CompositePredicate.

CompositePredicate

public CompositePredicate(Predicate p1,
                          Predicate p2)

Create a new CompositePredicate.

Parameters:

p1 - the first sub-predicate

p2 - the second sub-predicate

Method Detail

add

public void add(Predicate p)

Add a new clause.

Parameters:

p - the Predicate clause to add

remove

public boolean remove(Predicate p)

Remove a new clause.

Parameters:

p - the Predicate clause to remove

Returns:

true if removed, false if not found

clear

public void clear()

Remove all clauses.

size

public int size()

Get the number of sub-predicate clauses.

Returns:

the number of clauses

get

public Predicate get(int idx)

Get the sub-predicate at the given index.

Parameters:

idx - the index to lookup

Returns:

the sub-predicate at the given index

set

public void set(Predicate p)

Set the given predicate to be the only clause of thie composite.

Parameters:

p - the new sole sub-predicate clause

set

public void set(Predicate[] p)

Set the given predicates to be the clauses of thie composite.

Parameters:

p - the new sub-predicate clauses

getSubPredicate

public Predicate getSubPredicate(Predicate p)

Get a predicate instance just like this one but without the given predicate as a clause.

Parameters:

p - the predicate clause to ignore

Returns:

a clone of this predicate, only without the input predicate

visit

public void visit(ExpressionVisitor v)

Description copied from interface: Expression

Passes the visitor through this expression and any sub expressions

Specified by:

visit in interface Expression

Overrides:

visit in class AbstractExpression

Parameters:

v - the ExpressionVisitor

See Also:

Expression.visit(prefuse.data.expression.ExpressionVisitor)

addChildListeners

protected void addChildListeners()

Description copied from class: AbstractExpression

Add child listeners to catch and propagate sub-expression updates.

Overrides:

addChildListeners in class AbstractExpression

See Also:

AbstractExpression.addChildListeners()

removeChildListeners

protected void removeChildListeners()

Description copied from class: AbstractExpression

Remove child listeners for sub-expression updates.

Overrides:

removeChildListeners in class AbstractExpression

See Also:

AbstractExpression.removeChildListeners()

toString

protected java.lang.String toString(java.lang.String op)

Return a String representation of this predicate.

Parameters:

op - a String describing the operation this Predicate performs

Returns:

a String representing this Expression