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.asterix.column.bytes.decoder;
  
  import java.io.IOException;
  
  import org.apache.asterix.column.bytes.stream.in.AbstractBytesInputStream;
  import org.apache.hyracks.data.std.api.IValueReference;
  import org.apache.hyracks.data.std.primitive.VoidPointable;
  import org.apache.parquet.bytes.BytesUtils;
  import org.apache.parquet.io.ParquetDecodingException;
  
  public class ParquetDeltaLengthByteArrayValuesReader extends AbstractParquetValuesReader {
  
      private final VoidPointable value;
      private final AbstractParquetValuesReader lengthReader;
      private AbstractBytesInputStream in;
  
      public ParquetDeltaLengthByteArrayValuesReader() {
          this.lengthReader = new ParquetDeltaBinaryPackingValuesReader();
          value = new VoidPointable();
      }
  
      @Override
      public void initFromPage(AbstractBytesInputStream stream) throws IOException {
          AbstractBytesInputStream lengthStream = stream.sliceStream(BytesUtils.readUnsignedVarInt(stream));
          lengthReader.initFromPage(lengthStream);
          this.in = stream;
      }
  
      @Override
      public void skip() {
          int length = lengthReader.readInteger();
          try {
              in.skipFully(length);
          } catch (IOException e) {
              throw new ParquetDecodingException("Failed to skip " + length + " bytes");
          }
      }
  
      @Override
      public IValueReference readBytes() {
          int length = lengthReader.readInteger();
          try {
              in.read(value, length);
              return value;
          } catch (IOException e) {
              throw new ParquetDecodingException("Failed to read " + length + " bytes");
          }
      }
  
  }
  