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diff --git a/SA_POP/utils/PDDLtoSANetTranslator/PDDLParser/src/pddl4j/exp/cond/CondExp.java b/SA_POP/utils/PDDLtoSANetTranslator/PDDLParser/src/pddl4j/exp/cond/CondExp.java
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+++ b/SA_POP/utils/PDDLtoSANetTranslator/PDDLParser/src/pddl4j/exp/cond/CondExp.java
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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.cond;
+
+import pddl4j.exp.AbstractExp;
+import pddl4j.exp.ExpID;
+
+/**
+ * This abstract class defines a conditional expression of the pddl language.
+ * 
+ * @author Damien Pellier
+ * @version 1.0
+ */
+public abstract class CondExp extends AbstractExp {
+
+    /**
+     * The condition of this conditional expression.
+     */
+    private Condition condition;
+
+    /**
+     * Creates a new conditional expression with a specified condition.
+     * 
+     * @param cond the condition of this expression.
+     * @throws NullPointerException if <code>condition  == null</code>.
+     */
+    protected CondExp(Condition cond) {
+        super(ExpID.COND_EXP);
+        this.condition = cond;
+    }
+
+    /**
+     * Returns the condition of this conditional expression.
+     * 
+     * @return the condition of this conditional expression.
+     */
+    public final Condition getCondition() {
+        return this.condition;
+    }
+
+    /**
+     * Returns <code>true</code> if this conditional expression is equal to an
+     * other object. This method returns <code>true</code> if the object is a
+     * not null instance of the class <code>CondExp</code> and both
+     * conditional expression have the same condition.
+     * 
+     * @param obj the object to be compared.
+     * @return <code>true</code> if this conditional expression is equal to an
+     *         other object; <code>false</code> otherwise.
+     */
+    public boolean equals(Object obj) {
+        if (obj != null && obj instanceof CondExp) {
+            CondExp other = (CondExp) obj;
+            return this.condition.equals(other.condition);
+        }
+        return false;
+    }
+
+    /**
+     * Returns a hash code value for the conditional expression. This method is
+     * supported for the benefit of hash tables such as those provided by
+     * <code>java.util.Hashtable</code>.
+     * 
+     * @return a hash code value for the conditional expression.
+     */
+    public int hashCode() {
+        return super.hashCode() + this.condition.hashCode();
+    }
+
+}