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

Example 1 with PlainIntegerDictionaryValuesWriter

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

the class TestDictionary method testIntDictionaryFallBack.

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

Example 2 with PlainIntegerDictionaryValuesWriter

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

the class TestDictionary method testIntDictionary.

@Test
public void testIntDictionary() throws IOException {
    int COUNT = 2000;
    int COUNT2 = 4000;
    final FallbackValuesWriter<PlainIntegerDictionaryValuesWriter, PlainValuesWriter> cw = newPlainIntegerDictionaryValuesWriter(10000, 10000);
    for (int i = 0; i < COUNT; i++) {
        cw.writeInteger(i % 50);
    }
    BytesInput bytes1 = getBytesAndCheckEncoding(cw, PLAIN_DICTIONARY);
    assertEquals(50, cw.initialWriter.getDictionarySize());
    for (int i = COUNT2; i > 0; i--) {
        cw.writeInteger(i % 50);
    }
    BytesInput bytes2 = getBytesAndCheckEncoding(cw, PLAIN_DICTIONARY);
    assertEquals(50, cw.initialWriter.getDictionarySize());
    DictionaryValuesReader cr = initDicReader(cw, INT32);
    cr.initFromPage(COUNT, bytes1.toInputStream());
    for (int i = 0; i < COUNT; i++) {
        int back = cr.readInteger();
        assertEquals(i % 50, back);
    }
    cr.initFromPage(COUNT2, bytes2.toInputStream());
    for (int i = COUNT2; i > 0; i--) {
        int back = cr.readInteger();
        assertEquals(i % 50, back);
    }
}

Example 3 with PlainIntegerDictionaryValuesWriter

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

the class TestDictionary method testZeroValues.

@Test
public void testZeroValues() throws IOException {
    FallbackValuesWriter<PlainIntegerDictionaryValuesWriter, PlainValuesWriter> cw = newPlainIntegerDictionaryValuesWriter(100, 100);
    cw.writeInteger(34);
    cw.writeInteger(34);
    getBytesAndCheckEncoding(cw, PLAIN_DICTIONARY);
    DictionaryValuesReader reader = initDicReader(cw, INT32);
    // pretend there are 100 nulls. what matters is offset = bytes.length.
    // data doesn't matter
    ByteBuffer bytes = ByteBuffer.wrap(new byte[] { 0x00, 0x01, 0x02, 0x03 });
    ByteBufferInputStream stream = ByteBufferInputStream.wrap(bytes);
    stream.skipFully(stream.available());
    reader.initFromPage(100, stream);
}