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.constraintsolver.smtlib.petl;
  
  final class SMTLibOperator {
      static class Builder {
          private String identifier;
  
          Builder setIdentifier(String identifier) {
              this.identifier = identifier;
              return this;
          }
  
          String getIdentifier() {
              return identifier;
          }
  
          SMTLibOperator build() {
              return new SMTLibOperator(this);
          }
      }
  
      private String identifer;
  
      private SMTLibOperator(Builder builder) {
          assert builder != null;
          assert builder.getIdentifier() != null;
  
          identifer = builder.getIdentifier();
      }
  
      String getIdentifer() {
          return identifer;
      }	
  }
  