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/*
* Copyright Dept. of Mathematics & Computer Science Univ. Paris-Descartes This
* software is governed by the CeCILL license under French law and abiding by
* the rules of distribution of free software. You can use, modify and/ or
* redistribute the software under the terms of the CeCILL license as circulated
* by CEA, CNRS and INRIA at the following URL "http://www.cecill.info". As a
* counterpart to the access to the source code and rights to copy, modify and
* redistribute granted by the license, users are provided only with a limited
* warranty and the software's author, the holder of the economic rights, and
* the successive licensors have only limited liability. In this respect, the
* user's attention is drawn to the risks associated with loading, using,
* modifying and/or developing or reproducing the software by the user in light
* of its specific status of free software, that may mean that it is complicated
* to manipulate, and that also therefore means that it is reserved for
* developers and experienced professionals having in-depth computer knowledge.
* Users are therefore encouraged to load and test the software's suitability as
* regards their requirements in conditions enabling the security of their
* systems and/or data to be ensured and, more generally, to use and operate it
* in the same conditions as regards security. The fact that you are presently
* reading this means that you have had knowledge of the CeCILL license and that
* you accept its terms.
*/
package pddl4j.exp;
import java.util.Iterator;
import pddl4j.exp.term.Substitution;
import pddl4j.exp.term.Term;
/**
* This class implements negative atomic formula of the PDDL language.
*
* @author Damien Pellier
* @version 1.0
*/
public class NotAtomicFormula extends NotExp implements Literal {
/**
* The serial version id of the class.
*/
private static final long serialVersionUID = -1751696323200745754L;
/**
* Creates a new negative atomic formula with a specific atomic formula.
*
* @param atom the atomic formula contained in this negative atomic formula.
* @throws NullPointerException if <code>atom == null</code>.
*/
public NotAtomicFormula(AtomicFormula atom) {
super(atom);
}
/**
* Sets a new predicate to this negative atomic formula.
*
* @param predicate the new predicate to set.
* @throws NullPointerException if <code>predicate == null</code>.
*/
public final void setPredicate(String predicate) {
this.getExp().setPredicate(predicate);
}
/**
* Returns the predicate of this negative atomic formula.
*
* @return the predicate of this negative atomic formula.
*/
public final String getPredicate() {
return this.getExp().getPredicate();
}
/**
* Adds a new term to this negative atomic formula.
*
* @param term the term to add.
* @return <code>true</tt> if the expression was added; <code>false</code>
* otherwise.
* @throws NullPointerException if <code>term == null</code>.
*/
public final boolean add(Term term) {
return this.getExp().add(term);
}
/**
* Returns the arity of this negative atomic formula.
*
* @return the arity of this negative atomic formula.
*/
public final int getArity() {
return this.getExp().getArity();
}
/**
* Returns an iterator over the expression of this negative atomic formula.
*
* @return an iterator over the expression of this negative atomic formula.
* @see java.lang.Iterable#iterator()
*/
public final Iterator<Term> iterator() {
return this.getExp().iterator();
}
/**
* Substitutes all occurrences of the variables that occur in this
* expression and that are mapped in the substitution by its binding
* expression.
*
* @param sigma the substitution.
* @return a substituted copy of this expression.
* @throws NullPointerException if <code>sigma == null</code>.
*/
public final NotAtomicFormula apply(Substitution sigma) {
return new NotAtomicFormula((AtomicFormula) this.exp.apply(sigma));
}
/**
* Returns the negated expression of this expression.
*
* @return the negated expression of this expression.
*/
public AtomicFormula getExp() {
return (AtomicFormula) super.getExp();
}
/**
* Creates and returns a copy of this expression.
*
* @return a clone of this expression instance.
* @see pddl4j.exp.Exp#clone()
*/
public NotAtomicFormula clone() {
return (NotAtomicFormula) super.clone();
}
}
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