content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License 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 org.apache.arrow.vector.compare;
  
  import org.apache.arrow.vector.BaseFixedWidthVector;
  import org.apache.arrow.vector.BaseLargeVariableWidthVector;
  import org.apache.arrow.vector.BaseVariableWidthVector;
  import org.apache.arrow.vector.BaseVariableWidthViewVector;
  import org.apache.arrow.vector.ExtensionTypeVector;
  import org.apache.arrow.vector.NullVector;
  import org.apache.arrow.vector.complex.DenseUnionVector;
  import org.apache.arrow.vector.complex.FixedSizeListVector;
  import org.apache.arrow.vector.complex.LargeListVector;
  import org.apache.arrow.vector.complex.LargeListViewVector;
  import org.apache.arrow.vector.complex.ListVector;
  import org.apache.arrow.vector.complex.ListViewVector;
  import org.apache.arrow.vector.complex.NonNullableStructVector;
  import org.apache.arrow.vector.complex.RunEndEncodedVector;
  import org.apache.arrow.vector.complex.UnionVector;
  
  /**
   * Generic visitor to visit a {@link org.apache.arrow.vector.ValueVector}.
   *
   * @param <OUT> the output result type.
   * @param <IN> the input data together with visitor.
   */
  public interface VectorVisitor<OUT, IN> {
  
    OUT visit(BaseFixedWidthVector left, IN value);
  
    OUT visit(BaseVariableWidthVector left, IN value);
  
    OUT visit(BaseLargeVariableWidthVector left, IN value);
  
    OUT visit(BaseVariableWidthViewVector left, IN value);
  
    OUT visit(ListVector left, IN value);
  
    OUT visit(FixedSizeListVector left, IN value);
  
    OUT visit(LargeListVector left, IN value);
  
    OUT visit(NonNullableStructVector left, IN value);
  
    OUT visit(UnionVector left, IN value);
  
    OUT visit(DenseUnionVector left, IN value);
  
    OUT visit(NullVector left, IN value);
  
    OUT visit(ExtensionTypeVector<?> left, IN value);
  
    default OUT visit(ListViewVector left, IN value) {
      throw new UnsupportedOperationException("VectorVisitor for ListViewVector is not supported.");
    }
  
    default OUT visit(LargeListViewVector left, IN value) {
      throw new UnsupportedOperationException(
          "VectorVisitor for LargeListViewVector is not supported.");
    }
  
    default OUT visit(RunEndEncodedVector left, IN value) {
      throw new UnsupportedOperationException(
          "VectorVisitor for LargeListViewVector is not supported.");
    }
    ;
  }
  