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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;
/**
* This enumeration defines le set of PDDL require key.
*
* @author Damien Pellier
* @version 1.0
*/
public enum RequireKey {
/**
* The PDDL :strips requirement.
*/
STRIPS(":strips"),
/**
* The PDDL :typing requirement.
*/
TYPING(":typing"),
/**
* The PDDL :negative-preconditions requirement.
*/
NEGATIVE_PRECONDITIONS(":negative-preconditions"),
/**
* The PDDL :disjunctive-preconditions requirement.
*/
DISJUNCTIVE_PRECONDITIONS(":disjunctive-preconditions"),
/**
* The PDDL :equality requirement.
*/
EQUALITY(":equality"),
/**
* The PDDL :existential-preconditions requirement.
*/
EXISTENTIAL_PRECONDITIONS(":existential-preconditions"),
/**
* The PDDL :universal-preconditions requirement.
*/
UNIVERSAL_PRECONDITIONS(":universal-preconditions"),
/**
* The PDDL :quantified-preconditions requirement.
*/
QUANTIFIED_PRECONDITIONS(":quantified-preconditions"),
/**
* The PDDL :conditional-effects requirement.
*/
CONDITIONAL_EFFECTS(":conditional-effects"),
/**
* The PDDL :fluents requirement.
*/
FLUENTS(":fluents"),
/**
* The PDDL :adl requirement.
*/
ADL(":adl"),
/**
* The PDDL :durative-actions requirement.
*/
DURATIVE_ACTIONS(":durative-actions"),
/**
* The PDDL :derived-predicates requirement.
*/
DERIVED_PREDICATES(":derived-predicates"),
/**
* The PDDL :times-initial-literals requirement.
*/
TIMED_INITIAL_LITERALS(":timed-initial-literals"),
/**
* The PDDL :preferences requirement.
*/
PREFERENCES(":preferences"),
/**
* The PDDL :constraints requirement.
*/
CONSTRAINTS(":constraints"),
/**
* The PDDL :continus-effects requirement.
*/
CONTINUS_EFFECTS(":continous-effects"),
/**
* The PDDL :duration-inegalities requirement.
*/
DURATION_INEQUALITIES(":duration-inequalities");
/**
* The image associate to the require key in the PDDL langage.
*/
private String image;
/**
* Create a new require key with a specific image.
*
* @param image the image of the require key. The image of the require key must be not null.
*/
private RequireKey(String image) {
this.image = image;
}
/**
* Returns the require key with a specific image or <code>null</code> if there is no require key with the
* specific image.
*
* @param image the image of the require key searched.
* @return the require key searched or <code>null</code> if it was not found in the enumeration.
*/
public static RequireKey getRequireKey(String image) {
for (RequireKey rk : RequireKey.values()) {
if (rk.image.equalsIgnoreCase(image)) {
return rk;
}
}
return null;
}
/**
* Returns the image of this require key.
*
* @return the image of this require key.
*/
public String getImage() {
return this.image;
}
/**
* Returns a string representation of this require key.
*
* @return a string representation of this require key.
*/
public String toString() {
return this.image;
}
}
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