diff options
Diffstat (limited to 'SA_POP/utils/PDDLtoSANetTranslator/PDDLParser/src/pddl4j/exp/action/Action.java')
| -rw-r--r-- | SA_POP/utils/PDDLtoSANetTranslator/PDDLParser/src/pddl4j/exp/action/Action.java | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/SA_POP/utils/PDDLtoSANetTranslator/PDDLParser/src/pddl4j/exp/action/Action.java b/SA_POP/utils/PDDLtoSANetTranslator/PDDLParser/src/pddl4j/exp/action/Action.java new file mode 100644 index 00000000000..b0fc2d953be --- /dev/null +++ b/SA_POP/utils/PDDLtoSANetTranslator/PDDLParser/src/pddl4j/exp/action/Action.java @@ -0,0 +1,244 @@ +/* + * 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.action; + +import java.util.LinkedHashMap; +import java.util.Map; +import java.util.Iterator; + +import pddl4j.exp.AndExp; +import pddl4j.exp.Exp; +import pddl4j.exp.term.Term; + +/** + * This class implements a strips action of the pddl language. + * + * @author Damien Pellier + * @version 1.0 + */ +public class Action extends AbstractActionDef { + + /** + * The serial version id of the class. + */ + private static final long serialVersionUID = -991066278473010044L; + + /** + * The preconditions of the action. + */ + private Exp precondition; + + /** + * The effect of the action. + */ + private Exp effect; + + /** + * Creates a new strips action with a specific image. By default the + * precondition is set to an empty conjunctive precondition goal description + * and the effect to an empty proposition effect. + * + * @param name - the name of the action. The image musts be a not reference + * to a string. + * @throws NullPointerException if <code>name == null<code>. + */ + public Action(String name) { + super(ActionID.ACTION, name); + this.precondition = new AndExp(); + this.effect = new AndExp(); + } + + /** + * Returns the precondition of the action. + * + * @return the precondition of the action. + */ + public final Exp getPrecondition() { + return this.precondition; + } + + /** + * Sets the new precondition of the action. + * + * @param pre the new precondition of the action. + * @throws NullPointerException if <code>pre == null</code>. + */ + public final void setPrecondition(Exp pre) { + if (pre == null) + throw new NullPointerException(); + this.precondition = pre; + } + + /** + * Returns the effect of the action. + * + * @return the effect of the action. + * @throws NullPointerException if <code>effect == null</code>. + */ + public final Exp getEffect() { + return this.effect; + } + + /** + * Sets the new effect of the action. + * + * @param effect the new effect of the action. + */ + public final void setEffect(Exp effect) { + if (effect == null) + throw new NullPointerException(); + this.effect = effect; + } + + /** + * 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 Action standardize() { + Map<String,String> images = new LinkedHashMap<String, String>(); + Action other = this.clone(); + other.parameters.clear(); + for (Term param : this.parameters) { + other.add(param.standardize(images)); + } + other.precondition = this.precondition.standardize(images); + other.effect = this.effect.standardize(images); + return other; + } + + /** + * Normalize this action. This method returns a copy of this action where: + * <ul> + * <li> each variable is standardized,</li> + * <li> precondition expression is convert into disjunctive prenex normal + * form and</li> + * <li> effect expression is is convert into conjunctive prenex normal form.</li> + * <ul> + * + * @return a normalize copy of this action. + * @see pddl4j.exp.Exp#toPrenexNormaForm() + * @see pddl4j.exp.Exp#toConjunctiveNormalForm() + * @see pddl4j.exp.Exp#toDisjunctiveNormalForm() + */ + public Action normalize() { + Action other = (Action) this.standardize(); + other.precondition = other.precondition.moveQuantifierOutward() + .toDisjunctiveNormalForm(); + other.effect = other.effect.moveQuantifierOutward() + .toConjunctiveNormalForm(); + return other; + } + + /** + * Returns <code>true</code> if the action is ground. + * + * @return <code>true</code> if the action is ground; + * <code>false</code>otherwise. + * @see pddl4j.exp.Exp#isGround() + */ + public boolean isGround() { + return super.isGround() && this.precondition.isGround() + && this.effect.isGround(); + } + + /** + * Creates and returns a copy of this expression. + * + * @return a clone of this expression instance. + * @see pddl4j.exp.Exp#clone() + */ + public Action clone() { + Action other = (Action) super.clone(); + other.precondition = this.precondition.clone(); + other.effect = this.effect.clone(); + return other; + } + + /** + * Returns a string representation of the action. + * + * @return a string representation of the action. + */ + public String toString() { + StringBuffer str = new StringBuffer(); + str.append("(:action "); + str.append(this.getName().toString()); + str.append("\n"); + str.append(" :parameters "); + str.append("("); + if (!this.parameters.isEmpty()) { + Iterator<Term> i = this.parameters.iterator(); + Term param = i.next(); + str.append(param.toTypedString()); + while (i.hasNext()) { + str.append(" " + i.next().toTypedString()); + } + } + str.append(")"); + str.append("\n :precondition "); + str.append(this.precondition.toString()); + str.append("\n :effect "); + str.append(this.effect.toString()); + str.append(")"); + return str.toString(); + } + + /** + * Returns a typed string representation of the action. + * + * @return a typed string representation of the action. + */ + public String toTypedString() { + StringBuffer str = new StringBuffer(); + str.append("(:action "); + str.append(this.getName().toString()); + str.append("\n"); + str.append(" :parameters "); + str.append("("); + if (!this.parameters.isEmpty()) { + Iterator<Term> i = this.parameters.iterator(); + str.append(i.next().toTypedString()); + while (i.hasNext()) { + str.append(" " + i.next().toTypedString()); + } + } + str.append(")"); + str.append("\n :precondition "); + str.append(this.precondition.toTypedString()); + str.append("\n :effect "); + str.append(this.effect.toTypedString()); + str.append(")"); + return str.toString(); + } + +} |