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From omalley <...@git.apache.org>
Subject [GitHub] orc pull request #128: ORC-178 Implement Basic C++ Writer and Writer Option
Date Wed, 28 Jun 2017 21:13:39 GMT
Github user omalley commented on a diff in the pull request:

    https://github.com/apache/orc/pull/128#discussion_r124656638
  
    --- Diff: c++/include/orc/Writer.hh ---
    @@ -0,0 +1,294 @@
    +/**
    + * 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.
    + */
    +
    +#ifndef ORC_WRITER_HH
    +#define ORC_WRITER_HH
    +
    +#include "orc/Common.hh"
    +#include "orc/orc-config.hh"
    +#include "orc/Type.hh"
    +#include "orc/Vector.hh"
    +
    +#include <memory>
    +#include <string>
    +#include <vector>
    +
    +namespace orc {
    +
    +  // classes that hold data members so we can maintain binary compatibility
    +  struct WriterOptionsPrivate;
    +
    +  enum EncodingStrategy {
    +    EncodingStrategy_SPEED = 0,
    +    EncodingStrategy_COMPRESSION
    +  };
    +
    +  enum CompressionStrategy {
    +    CompressionStrategy_SPEED = 0,
    +    CompressionStrategy_COMPRESSION
    +  };
    +
    +  enum RleVersion {
    +    RleVersion_1,
    +    RleVersion_2
    +  };
    +
    +  class Timezone;
    +
    +  /**
    +   * Options for creating a Writer.
    +   */
    +  class WriterOptions {
    +  private:
    +    ORC_UNIQUE_PTR<WriterOptionsPrivate> privateBits;
    +
    +  public:
    +    WriterOptions();
    +    WriterOptions(const WriterOptions&);
    +    WriterOptions(WriterOptions&);
    +    WriterOptions& operator=(const WriterOptions&);
    +    virtual ~WriterOptions();
    +
    +    /**
    +     * Set the strip size.
    +     */
    +    WriterOptions& setStripeSize(uint64_t size);
    +
    +    /**
    +     * Get the strip size.
    +     * @return if not set, return default value.
    +     */
    +    uint64_t getStripeSize() const;
    +
    +    /**
    +     * Set the block size.
    +     */
    +    WriterOptions& setBlockSize(uint64_t size);
    +
    +    /**
    +     * Get the block size.
    +     * @return if not set, return default value.
    +     */
    +    uint64_t getBlockSize() const;
    +
    +    /**
    +     * Set row index stride.
    +     */
    +    WriterOptions& setRowIndexStride(uint64_t stride);
    +
    +    /**
    +     * Get the index stride size.
    +     * @return if not set, return default value.
    +     */
    +    uint64_t getRowIndexStride() const;
    +
    +    /**
    +     * Set the buffer size.
    +     */
    +    WriterOptions& setBufferSize(uint64_t size);
    +
    +    /**
    +     * Get the buffer size.
    +     * @return if not set, return default value.
    +     */
    +    uint64_t getBufferSize() const;
    +
    +    /**
    +     * Set the dictionary key size threshold.
    +     * 0 to disable dictionary encoding.
    +     * 1 to always enable dictionary encoding.
    +     */
    +    WriterOptions& setDictionaryKeySizeThreshold(double val);
    +
    +    /**
    +     * Get the dictionary key size threshold.
    +     */
    +    double getDictionaryKeySizeThreshold() const;
    +
    +    /**
    +     * Set whether or not to have block padding.
    +     */
    +    WriterOptions& setBlockPadding(bool padding);
    +
    +    /**
    +     * Get whether or not to have block padding.
    +     * @return if not set, return default value which is false.
    +     */
    +    bool getBlockPadding() const;
    +
    +    /**
    +     * Set Run length encoding version
    +     */
    +    WriterOptions& setRleVersion(RleVersion version);
    +
    +    /**
    +     * Get Run Length Encoding version
    +     */
    +    RleVersion getRleVersion() const;
    +
    +    /**
    +     * Set compression kind.
    +     */
    +    WriterOptions& setCompression(CompressionKind comp);
    +
    +    /**
    +     * Get the compression kind.
    +     * @return if not set, return default value which is ZLIB.
    +     */
    +    CompressionKind getCompression() const;
    +
    +    /**
    +     * Set the encoding strategy.
    +     */
    +    WriterOptions& setEncodingStrategy(EncodingStrategy strategy);
    +
    +    /**
    +     * Get the encoding strategy.
    +     * @return if not set, return default value which is SPEED.
    +     */
    +    EncodingStrategy getEncodingStrategy() const;
    +
    +    /**
    +     * Set the compression strategy.
    +     */
    +    WriterOptions& setCompressionStrategy(CompressionStrategy strategy);
    +
    +    /**
    +     * Get the compression strategy.
    +     * @return if not set, return default value which is speed.
    +     */
    +    CompressionStrategy getCompressionStrategy() const;
    +
    +    /**
    +     * Set the writer version.
    +     */
    +    WriterOptions& setWriterVersion(WriterVersion version);
    --- End diff --
    
    The user doesn't get to choose the WriterVersion. It is based on the version of the software
that writes the file.


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