com.hp.hpl.jena.graph.query
Class ExpressionSet

java.lang.Object
  com.hp.hpl.jena.graph.query.ExpressionSet

public class ExpressionSet
extends java.lang.Object

ExpressionSet: represent a set of (boolean) expressions ANDed together.

Author:

kers

Constructor Summary

ExpressionSet()
Initialise an expression set with no members.

Method Summary

ExpressionSet	add(Expression e) Answer this expressionset after e has been anded into it.
boolean	isComplex() Answer true iff this ExpressionSet is non-trivial (ie non-empty).
java.util.Iterator	iterator() Answer an iterator over all the Expressions in this ExpressionSet.
ValuatorSet	prepare(VariableIndexes vi) Answer a ValuatorSet which contains exactly the valuators for each Expression in this ExpressionSet, prepared against the VariableIndexes vi.
java.lang.String	toString() Answer a string representing this ExpressionSet for human consumption.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ExpressionSet

public ExpressionSet()

Initialise an expression set with no members.

Method Detail

add

public ExpressionSet add(Expression e)

Answer this expressionset after e has been anded into it.

Parameters:

e - the expression to and into the set

Returns:

this ExpressionSet

isComplex

public boolean isComplex()

Answer true iff this ExpressionSet is non-trivial (ie non-empty).

prepare

public ValuatorSet prepare(VariableIndexes vi)

Answer a ValuatorSet which contains exactly the valuators for each Expression in this ExpressionSet, prepared against the VariableIndexes vi.

iterator

public java.util.Iterator iterator()

Answer an iterator over all the Expressions in this ExpressionSet.

toString

public java.lang.String toString()

Answer a string representing this ExpressionSet for human consumption.

Overrides:

toString in class java.lang.Object