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Rule base analysis for InteGraal. This is imported from Graal
/*
* Copyright (C) Inria Sophia Antipolis - Méditerranée / LIRMM
* (Université de Montpellier & CNRS) (2014 - 2017)
*
* Contributors :
*
* Clément SIPIETER
* Mélanie KÖNIG
* Swan ROCHER
* Jean-François BAGET
* Michel LECLÈRE
* Marie-Laure MUGNIER
*
*
* This file is part of Graal .
*
* 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 fr.lirmm.graphik.integraal.rulesetanalyser.property;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import fr.lirmm.graphik.integraal.api.core.Atom;
import fr.lirmm.graphik.integraal.api.core.Rule;
import fr.lirmm.graphik.integraal.api.core.Term;
import fr.lirmm.graphik.integraal.api.core.Variable;
import fr.lirmm.graphik.util.stream.CloseableIteratorWithoutException;
/**
* At least one atom in the body (called a guard) contains all the variables
* from the body.
*
* @author Clément Sipieter (INRIA) {@literal }
* @author Swan Rocher
*
*/
public final class GuardedProperty extends RuleSetProperty.Local {
private static GuardedProperty instance = null;
private GuardedProperty(){}
public static synchronized GuardedProperty instance() {
if(instance == null) {
instance = new GuardedProperty();
}
return instance;
}
@Override
public String getFullName() {
return "Guarded";
}
@Override
public String getDescription() {
return "At least one atom in the body (called a guard) contains all the variables from the body.";
}
@Override
public int check(Rule rule) {
Set bodyVars = rule.getBody().getVariables();
boolean isGuarded = true;
CloseableIteratorWithoutException it = rule.getBody().iterator();
while (it.hasNext()) {
Atom a = it.next();
isGuarded = true;
for (Term v : bodyVars) {
if (!a.getTerms().contains(v)) {
isGuarded = false;
break;
}
}
if (isGuarded) {
break;
}
}
if (isGuarded) return 1;
return -1;
}
@Override
public String getLabel() {
return "g";
}
@Override
public Iterable getGeneralisations() {
List gen = new LinkedList();
gen.add(FrontierGuardedProperty.instance());
gen.add(WeaklyGuardedSetProperty.instance());
gen.add(WeaklyFrontierGuardedSetProperty.instance());
gen.add(JointlyFrontierGuardedSetProperty.instance());
gen.add(GBTSProperty.instance());
gen.add(BTSProperty.instance());
return gen;
}
};