Package io.deephaven.parquet.table.transfer

Class StringDictionary

java.lang.Object
io.deephaven.parquet.table.transfer.StringDictionary
public final class StringDictionary extends Object
Stores a dictionary of strings and returns their position in the dictionary, useful for encoding string columns.

  • Constructor Details

    • StringDictionary

      public StringDictionary(int maxKeys, int maxDictSize, org.apache.parquet.column.statistics.Statistics<?> statistics, int nullPos)

  • Method Details

    • getKeyCount

      public int getKeyCount()

    • getEncodedKeys

      public org.apache.parquet.io.api.Binary[] getEncodedKeys()

    • add

      public int add(String key)
      Add a string key to the dictionary if it's not already present.
      Parameters:
      key - The key to add and/or find the position for
      Returns:
      key's position in the dictionary, or special null key position (passed in constructor) if key == null