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Diffstat (limited to 'utils/PDDLtoSANetTranslator/PDDLParser/src/pddl4j/exp/ExistsExp.java')
| -rw-r--r-- | utils/PDDLtoSANetTranslator/PDDLParser/src/pddl4j/exp/ExistsExp.java | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/utils/PDDLtoSANetTranslator/PDDLParser/src/pddl4j/exp/ExistsExp.java b/utils/PDDLtoSANetTranslator/PDDLParser/src/pddl4j/exp/ExistsExp.java new file mode 100644 index 00000000000..ee8eb83a7fc --- /dev/null +++ b/utils/PDDLtoSANetTranslator/PDDLParser/src/pddl4j/exp/ExistsExp.java @@ -0,0 +1,173 @@ +/* + * 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.LinkedHashMap; +import java.util.Map; + +import pddl4j.exp.term.Variable; + +/** + * This class implements an existential expression of the PDDL language. + * + * @author Damien Pellier + * @version 1.0 + */ +public final class ExistsExp extends QuantifiedExp { + + /** + * The serial version id of the class. + */ + private static final long serialVersionUID = 509423923623946119L; + + /** + * Creates a new existential expression with a specific list of bound + * variables and quantified expression. + * + * @param exp the quantified expression. + */ + public ExistsExp(Exp exp) { + super(ExpID.EXIST, exp); + } + + /** + * Creates a new existential expression with a specific list of bound + * variables and quantified expression. + */ + public ExistsExp() { + super(ExpID.EXIST); + } + + /** + * Standardizes all occurrences of the variables that occur in this + * expression. Remember that free variables are existentially quantified. + * + * @return a standardized copy of this expression. + */ + public ExistsExp standardize() { + return this.standardize(new LinkedHashMap<String,String>()); + } + + /** + * Standardizes all occurrences of the variables that occur in this + * expression. The map argument is used to store the variable already + * standardized. The bound argument is used to store the bound variables. + * Remember that free variables are existentially quantified. + * + * @param images the object that maps old variable images to the standardize + * image. + * @return a standardized copy of this expression. + * @throws NullPointerException if <code>images == null || bound == null</code>. + * @see pddl4j.exp.Exp#standardize(Map) + */ + public ExistsExp standardize(Map<String, String> images) { + return (ExistsExp) super.standardize(images); + } + + /** + * Creates and returns a copy of this expression. + * + * @return a clone of this expression instance. + * @see pddl4j.exp.Exp#clone() + */ + public ExistsExp clone() { + return (ExistsExp) super.clone(); + } + + /** + * Return the disjunctive normal form of this expression. Note, the + * expression returned is a copy. + * + * @return the disjunctive normal form of this expression. + * @see pddl4j.exp.Exp#toDisjunctiveNormalForm() + */ + public ExistsExp toDisjunctiveNormalForm() { + ExistsExp dnf = this.clone(); + dnf.exp = this.exp.toDisjunctiveNormalForm(); + return dnf; + } + + /** + * Returns the conjunctive normal form of this expression. Note, the + * expression returned is a copy. + * + * @return the conjunctive normal form of this expression. + * @see pddl4j.exp.Exp#toConjunctiveNormalForm() + */ + public ExistsExp toConjunctiveNormalForm() { + ExistsExp cnf = this.clone(); + cnf.exp = this.exp.toConjunctiveNormalForm(); + return cnf; + } + + /** + * Returns the negative normal form of this expression. Note, the expression + * returned is a copy. + * + * @return the negative normal form of this expression. + * @see pddl4j.exp.Exp#toNegativeNormalForm() + */ + public ExistsExp toNegativeNormalForm() { + ExistsExp nnf = this.clone(); + nnf.exp = this.exp.toNegativeNormalForm(); + return nnf; + } + + /** + * Returns a copy of this expression such that the quantifiers appear first. + * + * @return a copy of this expression such that the quantifiers appear first. + * @see pddl4j.exp.Exp#moveQuantifierOutward() + */ + public Exp moveQuantifierOutward() { + ExistsExp exists = this.clone(); + exists.exp = this.exp.moveQuantifierOutward(); + if (exists.exp.getExpID().equals(ExpID.FORALL)) { + ForallExp forall = (ForallExp) exists.exp; + exists.setExp(forall.exp); + forall.setExp(exists); + return forall; + } else if (exists.exp.getExpID().equals(ExpID.EXIST)) { + ExistsExp other = (ExistsExp) exists.exp; + for (Variable var : other) { + exists.add(var); + } + exists.setExp(other.exp); + return exists; + } else if (exists.exp.getExpID().equals(ExpID.WHEN)) { + WhenExp when = (WhenExp) exists.exp; + exists.setExp(when.getCondition()); + when.setCondition(exists); + return when; + } + return exists; + } +} |