org.apache.hadoop.fs.s3a.select.InternalSelectConstants Maven / Gradle / Ivy

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This module contains code to support integration with Amazon Web Services. It also declares the dependencies needed to work with AWS services.

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/*
 * 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.hadoop.fs.s3a.select;

import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.fs.s3a.impl.InternalConstants;

import static org.apache.hadoop.fs.s3a.select.SelectConstants.*;

/**
 * Constants for internal use in the org.apache.hadoop.fs.s3a module itself.
 * Please don't refer to these outside of this module & its tests.
 * If you find you need to then either the code is doing something it
 * should not, or these constants need to be uprated to being
 * public and stable entries.
 */
@InterfaceAudience.Private
public final class InternalSelectConstants {

  private InternalSelectConstants() {
  }

  /**
   * An unmodifiable set listing the options
   * supported in {@code openFile()}.
   */
  public static final Set SELECT_OPTIONS;

  /*
   * Build up the options, pulling in the standard set too.
   */
  static {
    // when adding to this, please keep in alphabetical order after the
    // common options and the SQL.
    HashSet options = new HashSet<>(Arrays.asList(
        SELECT_SQL,
        SELECT_ERRORS_INCLUDE_SQL,
        SELECT_INPUT_COMPRESSION,
        SELECT_INPUT_FORMAT,
        SELECT_OUTPUT_FORMAT,
        CSV_INPUT_COMMENT_MARKER,
        CSV_INPUT_HEADER,
        CSV_INPUT_INPUT_FIELD_DELIMITER,
        CSV_INPUT_QUOTE_CHARACTER,
        CSV_INPUT_QUOTE_ESCAPE_CHARACTER,
        CSV_INPUT_RECORD_DELIMITER,
        CSV_OUTPUT_FIELD_DELIMITER,
        CSV_OUTPUT_QUOTE_CHARACTER,
        CSV_OUTPUT_QUOTE_ESCAPE_CHARACTER,
        CSV_OUTPUT_QUOTE_FIELDS,
        CSV_OUTPUT_RECORD_DELIMITER
    ));
    options.addAll(InternalConstants.STANDARD_OPENFILE_KEYS);
    SELECT_OPTIONS = Collections.unmodifiableSet(options);
  }
}