/*
 * Copyright 2017 Graz University of Technology EAAF-Core Components has been developed in a
 * cooperation between EGIZ, A-SIT Plus, A-SIT, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.2 or - as soon they will be approved by the European
 * Commission - subsequent versions of the EUPL (the "Licence"); You may not use this work except in
 * compliance with the Licence. You may obtain a copy of the Licence at:
 * https://joinup.ec.europa.eu/news/understanding-eupl-v12
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the Licence
 * is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the Licence for the specific language governing permissions and limitations under
 * the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text file for details on the
 * various modules and licenses. The "NOTICE" text file is part of the distribution. Any derivative
 * works that you distribute must include a readable copy of the "NOTICE" text file.
*/

package at.gv.egiz.eaaf.core.api.idp.process;

/**
 * Evaluates a given {@code expression} returning a boolean value.
 *
 * @author tknall
 */
public interface ExpressionEvaluator {

  /**
   * Evaluates a given {@code expression} returning a boolean value.
   *
   * @param expressionContext The context which can be used for evaluation of the
   *                          expression.
   * @param expression        The expression resulting in a boolean (must not be
   *                          {@code null}).
   * @return A boolean value.
   * @throws IllegalArgumentException In case of an invalid {@code expression}.
   * @throws NullPointerException     In case of a {@code null} expression.
   */
  boolean evaluate(ExpressionEvaluationContext expressionContext, String expression);

}