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;
  
  import com.amazon.ion.SymbolToken;
  import com.amazon.ion.UnknownSymbolException;
  
  
  final class SymbolTokenImpl
      implements _Private_SymbolToken
  {
      private final String myText;
      private final int mySid;
  
      SymbolTokenImpl(String text, int sid)
      {
          assert text != null || sid >= 0 : "Neither text nor sid is defined";
  
          myText = text;
          mySid = sid;
      }
  
      SymbolTokenImpl(int sid)
      {
          assert sid >= 0 : "sid is undefined";
  
          myText = null;
          mySid = sid;
      }
  
  
      public String getText()
      {
          return myText;
      }
  
      public String assumeText()
      {
          if (myText == null) throw new UnknownSymbolException(mySid);
          return myText;
      }
  
      public int getSid()
      {
          return mySid;
      }
  
      @Override
      public String toString()
      {
          return "SymbolToken::{text:" + myText + ",id:" + mySid + "}";
      }
  
      /*
       * TODO amazon-ion/ion-java#126
       *Equals and hashCode must be symmetric.
       *Two symboltokens are only equal when text1 equals text2 (including null == null)
       *This is an incomplete solution, needs to be updated as symboltokens are fleshed out.
       */
  
      @Override
      public boolean equals(Object o) {
          if (this == o) return true;
          if (o == null || !(o instanceof SymbolToken)) return false;
  
          SymbolToken other = (SymbolToken) o;
          if(getText() == null || other.getText() == null){
              return getText() == other.getText();
          }
          return getText().equals(other.getText());
      }
  
      @Override
      public int hashCode() {
          if(getText() != null) return getText().hashCode();
          return 0;
      }
  }
  