net.sf.tweety.logics.commons.syntax

Class FunctionalTerm

java.lang.Object

net.sf.tweety.logics.commons.syntax.TermAdapter<net.sf.tweety.commons.util.Pair<Functor,List<Term<?>>>>

net.sf.tweety.logics.commons.syntax.FunctionalTerm

All Implemented Interfaces:

LogicStructure, Term<net.sf.tweety.commons.util.Pair<Functor,List<Term<?>>>>

public class FunctionalTerm
extends TermAdapter<net.sf.tweety.commons.util.Pair<Functor,List<Term<?>>>>

A functional term in a logic language, i.e. a functor and a list of argument terms.

Author:

Matthias Thimm,, Tim Janus

Field Summary

Fields inherited from class net.sf.tweety.logics.commons.syntax.TermAdapter

value

Constructor Summary

Constructors

Constructor and Description
FunctionalTerm(FunctionalTerm other)
FunctionalTerm(Functor functor) Creates a new functional term with the given functor.
FunctionalTerm(Functor functor, List<Term<?>> arguments) Creates a new functional term with the given functor and the given list of arguments.
FunctionalTerm(Functor functor, Term<?>... terms)

Method Summary

Modifier and Type	Method and Description
FunctionalTerm	addArgument(Term<?> term) Appends the given argument to this term's arguments and returns itself.
FunctionalTerm	clone() Creates a deep copy of the term
List<Term<?>>	getArguments()
Functor	getFunctor()
Set<Term<?>>	getTerms()
<C extends Term<?>> Set<C>	getTerms(Class<C> cls) Processes the set containing all terms of type C.
boolean	isComplete() Checks whether this term is complete, i.e.
Term<?>	substitute(Term<?> v, Term<?> t) Substitutes all occurrences of term "v" in this term by term "t" and returns the new term.
String	toString()

Methods inherited from class net.sf.tweety.logics.commons.syntax.TermAdapter

containsTermsOfType, equals, get, getSort, hashCode, set

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionalTerm

public FunctionalTerm(Functor functor,
                      Term<?>... terms)

FunctionalTerm

public FunctionalTerm(Functor functor,
                      List<Term<?>> arguments)

Creates a new functional term with the given functor and the given list of arguments.

Parameters:

functor - the functor of this term

arguments - the list of arguments of this functional term

FunctionalTerm

public FunctionalTerm(FunctionalTerm other)

FunctionalTerm

public FunctionalTerm(Functor functor)

Creates a new functional term with the given functor.

Parameters:

functor -

Method Detail

getFunctor

public Functor getFunctor()

getArguments

public List<Term<?>> getArguments()

isComplete

public boolean isComplete()

Checks whether this term is complete, i.e. whether every argument is set.

Returns:

"true" if the term is complete.

addArgument

public FunctionalTerm addArgument(Term<?> term)
                           throws IllegalArgumentException

Appends the given argument to this term's arguments and returns itself.

Parameters:

term - an argument to be added

Returns:

the term itself.

Throws:

IllegalArgumentException - if the given term does not correspond to the expected sort or the argument list is complete.

getTerms

public Set<Term<?>> getTerms()

Specified by:

getTerms in interface LogicStructure

Overrides:

getTerms in class TermAdapter<net.sf.tweety.commons.util.Pair<Functor,List<Term<?>>>>

Returns:

a set containing all terms of this logical structure

getTerms

public <C extends Term<?>> Set<C> getTerms(Class<C> cls)

Description copied from interface: LogicStructure

Processes the set containing all terms of type C. This method uses the equals method of the given Class and therefore does not add terms which are sub classes of type C to the set.

Specified by:

getTerms in interface LogicStructure

Overrides:

getTerms in class TermAdapter<net.sf.tweety.commons.util.Pair<Functor,List<Term<?>>>>

Parameters:

cls - The Class structure containing type information about the searched term

Returns:

A set containing all terms of type C of this logical structure

substitute

public Term<?> substitute(Term<?> v,
                          Term<?> t)
                   throws IllegalArgumentException

Description copied from interface: Term

Substitutes all occurrences of term "v" in this term by term "t" and returns the new term.

Specified by:

substitute in interface Term<net.sf.tweety.commons.util.Pair<Functor,List<Term<?>>>>

Overrides:

substitute in class TermAdapter<net.sf.tweety.commons.util.Pair<Functor,List<Term<?>>>>

Parameters:

v - the term to be substituted.

t - the term to substitute.

Returns:

a term where every occurrence of "v" is replaced by "t".

Throws:

IllegalArgumentException - if "v" and "t" are of different sorts (NOTE: this exception is only thrown when "v" actually appears in this formula)

toString

public String toString()

Overrides:

toString in class TermAdapter<net.sf.tweety.commons.util.Pair<Functor,List<Term<?>>>>

clone

public FunctionalTerm clone()

Description copied from interface: Term

Creates a deep copy of the term

Specified by:

clone in interface Term<net.sf.tweety.commons.util.Pair<Functor,List<Term<?>>>>

Specified by:

clone in class TermAdapter<net.sf.tweety.commons.util.Pair<Functor,List<Term<?>>>>