Package org.apache.druid.segment.serde

Class ColumnSerializerUtils

java.lang.Object

org.apache.druid.segment.serde.ColumnSerializerUtils

public class ColumnSerializerUtils
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ARRAY_DICTIONARY_FILE_NAME
static final String	ARRAY_ELEMENT_BITMAP_INDEX_FILE_NAME
static final String	ARRAY_ELEMENT_DICTIONARY_FILE_NAME
static final String	BITMAP_INDEX_FILE_NAME
static final String	DOUBLE_DICTIONARY_FILE_NAME
static final String	DOUBLE_VALUE_COLUMN_FILE_NAME
static final String	ENCODED_VALUE_COLUMN_FILE_NAME
static final String	LONG_DICTIONARY_FILE_NAME
static final String	LONG_VALUE_COLUMN_FILE_NAME
static final String	NULL_BITMAP_FILE_NAME
static final com.fasterxml.jackson.databind.ObjectMapper	SMILE_MAPPER
static final String	STRING_DICTIONARY_FILE_NAME

Constructor Summary

Constructors

Constructor	Description
ColumnSerializerUtils()

Method Summary

Modifier and Type	Method	Description
static String	getInternalFileName(String fileNameBase, String field)
static SmooshedFileMapper	mapSerializer(File smooshFile, Serializer writer, String name)	Writes a Serializer to a 'smoosh file' which contains the contents of this single serializer, with the serializer writing to an internal file specified by the name argument, returning a SmooshedFileMapper
static ByteBuffer	stringToUtf8InVSizeByteBuffer(String stringVal)	Convert a String to a ByteBuffer with a variable size length prepended to it.
static void	writeInternal(FileSmoosher smoosher, Serializer serializer, String columnName, String fileName)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

STRING_DICTIONARY_FILE_NAME

public static final String STRING_DICTIONARY_FILE_NAME

See Also:

• Constant Field Values

LONG_DICTIONARY_FILE_NAME

public static final String LONG_DICTIONARY_FILE_NAME

See Also:

• Constant Field Values

DOUBLE_DICTIONARY_FILE_NAME

public static final String DOUBLE_DICTIONARY_FILE_NAME

See Also:

• Constant Field Values

ARRAY_DICTIONARY_FILE_NAME

public static final String ARRAY_DICTIONARY_FILE_NAME

See Also:

• Constant Field Values

ARRAY_ELEMENT_DICTIONARY_FILE_NAME

public static final String ARRAY_ELEMENT_DICTIONARY_FILE_NAME

See Also:

• Constant Field Values

ENCODED_VALUE_COLUMN_FILE_NAME

public static final String ENCODED_VALUE_COLUMN_FILE_NAME

See Also:

• Constant Field Values

LONG_VALUE_COLUMN_FILE_NAME

public static final String LONG_VALUE_COLUMN_FILE_NAME

See Also:

• Constant Field Values

DOUBLE_VALUE_COLUMN_FILE_NAME

public static final String DOUBLE_VALUE_COLUMN_FILE_NAME

See Also:

• Constant Field Values

BITMAP_INDEX_FILE_NAME

public static final String BITMAP_INDEX_FILE_NAME

See Also:

• Constant Field Values

ARRAY_ELEMENT_BITMAP_INDEX_FILE_NAME

public static final String ARRAY_ELEMENT_BITMAP_INDEX_FILE_NAME

See Also:

• Constant Field Values

NULL_BITMAP_FILE_NAME

public static final String NULL_BITMAP_FILE_NAME

See Also:

• Constant Field Values

SMILE_MAPPER

public static final com.fasterxml.jackson.databind.ObjectMapper SMILE_MAPPER

Constructor Details

ColumnSerializerUtils

public ColumnSerializerUtils()

Method Details

writeInternal

public static void writeInternal(FileSmoosher smoosher,
 Serializer serializer,
 String columnName,
 String fileName)
                          throws IOException

Throws:

IOException

getInternalFileName

public static String getInternalFileName(String fileNameBase,
 String field)

stringToUtf8InVSizeByteBuffer

public static ByteBuffer stringToUtf8InVSizeByteBuffer(String stringVal)

Convert a String to a ByteBuffer with a variable size length prepended to it.

Parameters:

stringVal - the value to store in the ByteBuffer

Returns:

ByteBuffer with the string converted to utf8 bytes and stored with a variable size length int prepended

mapSerializer

public static SmooshedFileMapper mapSerializer(File smooshFile,
 Serializer writer,
 String name)

Writes a Serializer to a 'smoosh file' which contains the contents of this single serializer, with the serializer writing to an internal file specified by the name argument, returning a SmooshedFileMapper