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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.time;
import pddl4j.exp.Exp;
/**
* This class implements an "over" timed expression of the PDDL langage.
*
* @author Damien Pellier
* @version 1.0
*/
public abstract class OverTimedExp extends TimedExp {
/**
* The time specifier of the "over" timed expression.
*/
protected Interval interval;
/**
* Creates a new "over" timed expression with a specific interval and
* expression.
*
* @param interval The interval of the timed expression.
* @param exp The timed expression.
* @throws NullPointerException if <code>interval == null</code> or
* <code>exp == null</code>.
*/
protected OverTimedExp(Interval interval, Exp exp) {
super(TimedExpID.OVER, exp);
if (interval == null)
throw new NullPointerException();
this.interval = interval;
}
/**
* Returns the interval of the timed expression.
*
* @return the interval of the timed expression.
*/
public final Interval getInterval() {
return this.interval;
}
/**
* Sets a new interval to the timed expression.
*
* @param interval The new interval to set.
* @throws NullPointerException if <code>interval == null</code>.
*/
public final void setTimeSpecifier(Interval interval) {
if (interval == null)
throw new NullPointerException();
this.interval = interval;
}
/**
* Returns <code>true</code> if the "over" timed expression is equal
* to an other object, i.e., if the object is a not null reference to an
* instance of the class <code>OverTimedExp</code> and both "over all"
* timed expression contain the same timed expression.
*
* @param obj The reference object with which to compare.
* @return <code>true</code> if the "over" timed expression equal to
* an other object; <code>false</code> otherwise.
*/
public boolean equals(Object obj) {
if (obj != null && this.getClass().equals(obj.getClass())) {
OverTimedExp other = (OverTimedExp) obj;
return super.equals(obj) && this.interval.equals(other.interval);
}
return false;
}
/**
* Returns a hash code value for the "over" timed expression. This
* method is supported for the benefit of hashtables such as those provided
* by <code>java.util.Hashtable</code>.
*
* @return a hash code value for the over timed expression.
*/
public int hashCode() {
return super.hashCode() + this.interval.hashCode();
}
/**
* Creates and returns a copy of this expression.
*
* @return a clone of this expression instance.
* @see pddl4j.exp.Exp#clone()
*/
public OverTimedExp clone() {
return (OverTimedExp) super.clone();
}
}
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