Examples with PlainDoubleDictionaryValuesWriter org.apache.parquet.column.values.dictionary.DictionaryValuesWriter.PlainDoubleDictionaryValuesWriter used on opensource projects

Example 1 with PlainDoubleDictionaryValuesWriter

use of org.apache.parquet.column.values.dictionary.DictionaryValuesWriter.PlainDoubleDictionaryValuesWriter in project parquet-mr by apache.

the class TestDictionary method testDoubleDictionaryFallBack.

@Test
public void testDoubleDictionaryFallBack() throws IOException {
    int slabSize = 100;
    int maxDictionaryByteSize = 50;
    final FallbackValuesWriter<PlainDoubleDictionaryValuesWriter, PlainValuesWriter> cw = newPlainDoubleDictionaryValuesWriter(maxDictionaryByteSize, slabSize);
    // Fallbacked to Plain encoding, therefore use PlainValuesReader to read it back
    ValuesReader reader = new PlainValuesReader.DoublePlainValuesReader();
    roundTripDouble(cw, reader, maxDictionaryByteSize);
    // simulate cutting the page
    cw.reset();
    assertEquals(0, cw.getBufferedSize());
    cw.resetDictionary();
    roundTripDouble(cw, reader, maxDictionaryByteSize);
}

Example 2 with PlainDoubleDictionaryValuesWriter

use of org.apache.parquet.column.values.dictionary.DictionaryValuesWriter.PlainDoubleDictionaryValuesWriter in project parquet-mr by apache.

the class TestDictionary method testDoubleDictionary.

@Test
public void testDoubleDictionary() throws IOException {
    int COUNT = 1000;
    int COUNT2 = 2000;
    final FallbackValuesWriter<PlainDoubleDictionaryValuesWriter, PlainValuesWriter> cw = newPlainDoubleDictionaryValuesWriter(10000, 10000);
    for (double i = 0; i < COUNT; i++) {
        cw.writeDouble(i % 50);
    }
    BytesInput bytes1 = getBytesAndCheckEncoding(cw, PLAIN_DICTIONARY);
    assertEquals(50, cw.initialWriter.getDictionarySize());
    for (double i = COUNT2; i > 0; i--) {
        cw.writeDouble(i % 50);
    }
    BytesInput bytes2 = getBytesAndCheckEncoding(cw, PLAIN_DICTIONARY);
    assertEquals(50, cw.initialWriter.getDictionarySize());
    final DictionaryValuesReader cr = initDicReader(cw, DOUBLE);
    cr.initFromPage(COUNT, bytes1.toInputStream());
    for (double i = 0; i < COUNT; i++) {
        double back = cr.readDouble();
        assertEquals(i % 50, back, 0.0);
    }
    cr.initFromPage(COUNT2, bytes2.toInputStream());
    for (double i = COUNT2; i > 0; i--) {
        double back = cr.readDouble();
        assertEquals(i % 50, back, 0.0);
    }
}