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.explorer;
  
  import epmc.value.Type;
  import epmc.value.TypeBoolean;
  import epmc.value.Value;
  import epmc.value.ValueBoolean;
  
  public final class PropertyNodeState implements PropertyNode {
      /** The explorer to which this property belongs. */
      private final ExplorerJANI explorer;
      /** Type of value stored. */
      private final TypeBoolean type;
      /** Value of this property for the node queried last. */
      private final ValueBoolean value;
  
      /**
       * Construct new node property.
       * None of the parameters may be {@code null}.
       * 
       * @param explorer explorer to which the property shall belong to
       * @param type type of the property
       */
      public PropertyNodeState(ExplorerJANI explorer) {
          assert explorer != null;
          this.explorer = explorer;
          this.type = TypeBoolean.get();
          this.value = type.newValue();
      }
  
      @Override
      public Value get() {
          value.set(explorer.isState());
          return value;
      }
  
      @Override
      public boolean getBoolean() {
          return explorer.isState();
      }
  
      @Override
      public Type getType() {
          return type;
      }
  }
  