[GitHub] spark pull request #20535: [SPARK-23341][SQL] define some standard options f...

[gengliangwang <gi...@git.apache.org>]

Github user gengliangwang commented on a diff in the pull request:

    https://github.com/apache/spark/pull/20535#discussion_r180171421
  
    --- Diff: sql/core/src/main/java/org/apache/spark/sql/sources/v2/DataSourceOptions.java ---
    @@ -97,4 +142,66 @@ public double getDouble(String key, double defaultValue) {
         return keyLowerCasedMap.containsKey(lcaseKey) ?
           Double.parseDouble(keyLowerCasedMap.get(lcaseKey)) : defaultValue;
       }
    +
    +  /**
    +   * The option key for singular path.
    +   */
    +  public static final String PATH_KEY = "path";
    +
    +  /**
    +   * The option key for multiple paths.
    +   */
    +  public static final String PATHS_KEY = "paths";
    +
    +  /**
    +   * The option key for table name.
    +   */
    +  public static final String TABLE_KEY = "table";
    +
    +  /**
    +   * The option key for database name.
    +   */
    +  public static final String DATABASE_KEY = "database";
    +
    +  /**
    +   * Returns the value of the singular path option.
    +   */
    +  public Optional<String> path() {
    +    return get(PATH_KEY);
    +  }
    +
    +  /**
    +   * Returns all the paths specified by both the singular path option and the multiple
    +   * paths option.
    +   */
    +  public String[] paths() {
    +    String[] singularPath = path().map(s -> new String[]{s}).orElseGet(() -> new String[0]);
    +    Optional<String> pathsStr = get(PATHS_KEY);
    +    System.out.println(pathsStr);
    --- End diff --
    
    remove println :)


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