code: /****************************************************************************
  
      ePMC - an extensible probabilistic model checker
      Copyright (C) 2017
  
      This program is free software: you can redistribute it and/or modify
      it under the terms of the GNU General Public License as published by
      the Free Software Foundation, either version 3 of the License, or
      (at your option) any later version.
  
      This program is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      GNU General Public License for more details.
  
      You should have received a copy of the GNU General Public License
      along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
   *****************************************************************************/
  
  package epmc.jani.model.property;
  
  import java.util.Collections;
  import java.util.List;
  
  import epmc.error.Positional;
  import epmc.expression.Expression;
  
  public final class ExpressionTimelock implements Expression {
      private final static String TIMELOCK = "\"timelock\"";
      private final Positional positional;
  
      public ExpressionTimelock(Positional positional) {
          this.positional = positional;
      }
  
      @Override
      public Expression replaceChildren(List<Expression> children) {
          return new ExpressionTimelock(positional);
      }
  
      @Override
      public List<Expression> getChildren() {
          return Collections.emptyList();
      }
  
      @Override
      public Positional getPositional() {
          return positional;
      }
  
      @Override
      public final String toString() {
          return TIMELOCK;
      }
  
      @Override
      public boolean equals(Object obj) {
          assert obj != null;
          if (this.getClass() != obj.getClass()) {
              return false;
          }
          return true;
      }    
  
      @Override
      public int hashCode() {
          int hash = 0;
          hash = getClass().hashCode() + (hash << 6) + (hash << 16) - hash;
  
          return hash;
      }
  
      @Override
      public Expression replacePositional(Positional positional) {
          return new ExpressionTimelock(positional);
      }
  }
  