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.driver.jdbc.accessor.impl.binary;
  
  import java.io.ByteArrayInputStream;
  import java.io.CharArrayReader;
  import java.io.InputStream;
  import java.io.Reader;
  import java.nio.charset.StandardCharsets;
  import java.util.function.IntSupplier;
  import org.apache.arrow.driver.jdbc.accessor.ArrowFlightJdbcAccessor;
  import org.apache.arrow.driver.jdbc.accessor.ArrowFlightJdbcAccessorFactory;
  import org.apache.arrow.vector.FixedSizeBinaryVector;
  import org.apache.arrow.vector.LargeVarBinaryVector;
  import org.apache.arrow.vector.VarBinaryVector;
  
  /**
   * Accessor for the Arrow types: {@link FixedSizeBinaryVector}, {@link VarBinaryVector} and {@link
   * LargeVarBinaryVector}.
   */
  public class ArrowFlightJdbcBinaryVectorAccessor extends ArrowFlightJdbcAccessor {
  
    private interface ByteArrayGetter {
      byte[] get(int index);
    }
  
    private final ByteArrayGetter getter;
  
    public ArrowFlightJdbcBinaryVectorAccessor(
        FixedSizeBinaryVector vector,
        IntSupplier currentRowSupplier,
        ArrowFlightJdbcAccessorFactory.WasNullConsumer setCursorWasNull) {
      this(vector::get, currentRowSupplier, setCursorWasNull);
    }
  
    public ArrowFlightJdbcBinaryVectorAccessor(
        VarBinaryVector vector,
        IntSupplier currentRowSupplier,
        ArrowFlightJdbcAccessorFactory.WasNullConsumer setCursorWasNull) {
      this(vector::get, currentRowSupplier, setCursorWasNull);
    }
  
    public ArrowFlightJdbcBinaryVectorAccessor(
        LargeVarBinaryVector vector,
        IntSupplier currentRowSupplier,
        ArrowFlightJdbcAccessorFactory.WasNullConsumer setCursorWasNull) {
      this(vector::get, currentRowSupplier, setCursorWasNull);
    }
  
    private ArrowFlightJdbcBinaryVectorAccessor(
        ByteArrayGetter getter,
        IntSupplier currentRowSupplier,
        ArrowFlightJdbcAccessorFactory.WasNullConsumer setCursorWasNull) {
      super(currentRowSupplier, setCursorWasNull);
      this.getter = getter;
    }
  
    @Override
    public byte[] getBytes() {
      byte[] bytes = getter.get(getCurrentRow());
      this.wasNull = bytes == null;
      this.wasNullConsumer.setWasNull(this.wasNull);
  
      return bytes;
    }
  
    @Override
    public Object getObject() {
      return this.getBytes();
    }
  
    @Override
    public Class<?> getObjectClass() {
      return byte[].class;
    }
  
    @Override
    public String getString() {
      byte[] bytes = this.getBytes();
      if (bytes == null) {
        return null;
      }
  
      return new String(bytes, StandardCharsets.UTF_8);
    }
  
    @Override
    public InputStream getAsciiStream() {
      byte[] bytes = getBytes();
      if (bytes == null) {
        return null;
      }
  
      return new ByteArrayInputStream(bytes);
    }
  
    @Override
    public InputStream getUnicodeStream() {
      byte[] bytes = getBytes();
      if (bytes == null) {
        return null;
      }
  
      return new ByteArrayInputStream(bytes);
    }
  
    @Override
    public InputStream getBinaryStream() {
      byte[] bytes = getBytes();
      if (bytes == null) {
        return null;
      }
  
      return new ByteArrayInputStream(bytes);
    }
  
    @Override
    public Reader getCharacterStream() {
      String string = getString();
      if (string == null) {
        return null;
      }
  
      return new CharArrayReader(string.toCharArray());
    }
  }
  