net.sf.tweety.action.query.syntax

Class QueryProposition

java.lang.Object

net.sf.tweety.logics.pl.syntax.PropositionalFormula

net.sf.tweety.logics.pl.syntax.Proposition

net.sf.tweety.action.query.syntax.QueryProposition

All Implemented Interfaces:

java.lang.Comparable<Proposition>, Formula, Atom, ClassicalFormula, Conjuctable, Disjunctable, Invertable, ProbabilityAware, SimpleLogicalFormula

Direct Known Subclasses:

AlwaysQuery, HoldsQuery, NecessarilyQuery

public abstract class QueryProposition
extends Proposition

Action queries are represented as propositional formulas with three possible types of propositions: holds, always and necessarily propositions. This class holds the common functionality of all these propositions.

Author:

Sebastian Homann

Nested Class Summary

Nested classes/interfaces inherited from interface net.sf.tweety.logics.commons.syntax.interfaces.Atom

Atom.AtomImpl, Atom.RETURN_SET_PREDICATE

Field Summary

Fields

Modifier and Type	Field and Description
protected FolFormula	formula

Constructor Summary

Constructors

Constructor and Description
QueryProposition(FolFormula formula, java.lang.String name) Creates a new query proposition with the given formula and a unique name, which is used by the base class.

Method Summary

Modifier and Type	Method and Description
ActionSignature	getActionSignature() Returns a new action signature containing all symbols of the inner formula of this proposition.
abstract java.util.Set<FolAction>	getInnerActions() Returns the set of all actions contained in this query proposition.
FolFormula	getInnerFormula() Returns the inner formula of this query proposition, e.g.
abstract java.util.Set<Variable>	getVariables() Returns all variables occuring in inner formulas and actions of this query proposition.
abstract QueryProposition	substitute(java.util.Map<? extends Term<?>,? extends Term<?>> map) Returns a new query proposition of the same type, in which all variables in inner formulas and actions are replaced according to the given map.
abstract java.lang.String	toString()

Methods inherited from class net.sf.tweety.logics.pl.syntax.Proposition

addArgument, clone, collapseAssociativeFormulas, compareTo, equals, getArguments, getAtoms, getLiterals, getModels, getName, getPredicate, getPredicates, getSignature, hashCode, isComplete, isLiteral, numberOfOccurrences, replace, setPredicate, toCnf, toNnf, trim

Methods inherited from class net.sf.tweety.logics.pl.syntax.PropositionalFormula

combineWithAnd, combineWithOr, complement, getModels, getPredicateCls, getPrimeImplicants, getUniformProbability, isConjunctiveClause, resolvableWith, resolveWith, toBlakeCanonicalForm, toDnf

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface net.sf.tweety.logics.commons.syntax.interfaces.SimpleLogicalFormula

getPredicateCls

Field Detail

formula

protected FolFormula formula

Constructor Detail

QueryProposition

public QueryProposition(FolFormula formula,
                        java.lang.String name)

Creates a new query proposition with the given formula and a unique name, which is used by the base class.

Parameters:

formula - a state formula.

name - a unique name.

Method Detail

getInnerFormula

public FolFormula getInnerFormula()

Returns the inner formula of this query proposition, e.g. "F" in the case of a holds F proposition.

getActionSignature

public ActionSignature getActionSignature()

Returns a new action signature containing all symbols of the inner formula of this proposition.

Returns:

a new action signature containing all symbols of the inner formula of this proposition.

getInnerActions

public abstract java.util.Set<FolAction> getInnerActions()

Returns the set of all actions contained in this query proposition. This is mainly a convenience function, as only necessarily propositions contain any actions.

Returns:

the set of all actions contained in this query proposition.

substitute

public abstract QueryProposition substitute(java.util.Map<? extends Term<?>,? extends Term<?>> map)

Returns a new query proposition of the same type, in which all variables in inner formulas and actions are replaced according to the given map.

Parameters:

map - a map from variables to constants.

Returns:

a new query proposition.

toString

public abstract java.lang.String toString()

Overrides:

toString in class Proposition

getVariables

public abstract java.util.Set<Variable> getVariables()

Returns all variables occuring in inner formulas and actions of this query proposition.

Returns:

all variables occuring in inner formulas and actions of this query proposition.