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.util;
  
  import com.amazon.ion.IonBlob;
  import com.amazon.ion.IonBool;
  import com.amazon.ion.IonClob;
  import com.amazon.ion.IonDatagram;
  import com.amazon.ion.IonDecimal;
  import com.amazon.ion.IonFloat;
  import com.amazon.ion.IonInt;
  import com.amazon.ion.IonList;
  import com.amazon.ion.IonNull;
  import com.amazon.ion.IonSexp;
  import com.amazon.ion.IonString;
  import com.amazon.ion.IonStruct;
  import com.amazon.ion.IonSymbol;
  import com.amazon.ion.IonTimestamp;
  import com.amazon.ion.IonValue;
  import com.amazon.ion.ValueVisitor;
  
  /**
   * A base class for extending Ion {@link ValueVisitor}s.
   * All <code>visit</code> methods are implemented to call
   * {@link #defaultVisit(IonValue)}.
   */
  public abstract class AbstractValueVisitor
      implements ValueVisitor
  {
  
      /**
       * Default visitation behavior, called by all <code>visit</code> methods
       * in {@link AbstractValueVisitor}.  Subclasses should override this unless
       * they override all <code>visit</code> methods.
       * <p>
       * This implementation always throws {@link UnsupportedOperationException}.
       *
       * @param value the value to visit.
       * @throws UnsupportedOperationException always thrown unless subclass
       * overrides this implementation.
       * @throws Exception subclasses can throw this; it will be propagated by
       * the other <code>visit</code> methods.
       */
      protected void defaultVisit(IonValue value) throws Exception
      {
          throw new UnsupportedOperationException();
      }
  
      public void visit(IonBlob value) throws Exception
      {
          defaultVisit(value);
      }
  
      public void visit(IonBool value) throws Exception
      {
          defaultVisit(value);
      }
  
      public void visit(IonClob value) throws Exception
      {
          defaultVisit(value);
      }
  
      public void visit(IonDatagram value) throws Exception
      {
          defaultVisit(value);
      }
  
      public void visit(IonDecimal value) throws Exception
      {
          defaultVisit(value);
      }
  
      public void visit(IonFloat value) throws Exception
      {
          defaultVisit(value);
      }
  
      public void visit(IonInt value) throws Exception
      {
          defaultVisit(value);
      }
  
      public void visit(IonList value) throws Exception
      {
          defaultVisit(value);
      }
  
      public void visit(IonNull value) throws Exception
      {
          defaultVisit(value);
      }
  
      public void visit(IonSexp value) throws Exception
      {
          defaultVisit(value);
      }
  
      public void visit(IonString value) throws Exception
      {
          defaultVisit(value);
      }
  
      public void visit(IonStruct value) throws Exception
      {
          defaultVisit(value);
      }
  
      public void visit(IonSymbol value) throws Exception
      {
          defaultVisit(value);
      }
  
      public void visit(IonTimestamp value) throws Exception
      {
          defaultVisit(value);
      }
  }
  