content: /*
   * Copyright 2007-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License").
   * You may not use this file except in compliance with the License.
   * A copy of the License is located at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * or in the "license" file accompanying this file. This file is distributed
   * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
   * express or implied. See the License for the specific language governing
   * permissions and limitations under the License.
   */
  
  package com.amazon.ion.impl.lite;
  
  import com.amazon.ion.SymbolTable;
  
  
  /**
   * Context for child values of an IonDatagramLite. The
   * datagram's child values that share the same local symbol table
   * will share the same TopLevelContext.
   */
  final class TopLevelContext
      implements IonContext
  {
      /**
       * References the containing datagram
       */
      private final IonDatagramLite _datagram;
  
      /**
       * This will be a local symbol table, or null.  It is not valid
       * for this to be a shared symbol table since shared
       * symbol tables are only shared.  It will not be a
       * system symbol table as the system object will be
       * able to resolve its symbol table to the system
       * symbol table and following the parent/owning_context
       * chain will lead to a system object.
       * <p>
       * TODO amazon-ion/ion-java/issues/19 we cannot assume that the IonSystem knows the proper IVM
       * in this context
       */
      private final SymbolTable _symbols;
  
      private TopLevelContext(SymbolTable symbols, IonDatagramLite datagram)
      {
          assert datagram != null;
          _symbols = symbols;
          _datagram = datagram;
      }
  
      static TopLevelContext wrap(SymbolTable symbols,
                                  IonDatagramLite datagram)
      {
          TopLevelContext context = new TopLevelContext(symbols, datagram);
          return context;
      }
  
      public IonDatagramLite getContextContainer()
      {
          return _datagram;
      }
  
      public SymbolTable getContextSymbolTable()
      {
          return _symbols;
      }
  
      public IonSystemLite getSystem()
      {
          return _datagram.getSystem();
      }
  
  }
  