Package org.apache.druid.segment.nested

Class NestedDataColumnSerializerV4

java.lang.Object

org.apache.druid.segment.nested.NestedDataColumnSerializerV4

All Implemented Interfaces:

GenericColumnSerializer<StructuredData>, Serializer

public class NestedDataColumnSerializerV4
extends Object
implements GenericColumnSerializer<StructuredData>

Field Summary

Fields

Modifier and Type	Field	Description
static String	DOUBLE_DICTIONARY_FILE_NAME
static String	LONG_DICTIONARY_FILE_NAME
static String	NESTED_FIELD_PREFIX
static String	NULL_BITMAP_FILE_NAME
static String	RAW_FILE_NAME
static String	STRING_DICTIONARY_FILE_NAME

Constructor Summary

Constructors

Constructor	Description
NestedDataColumnSerializerV4(String name, IndexSpec indexSpec, SegmentWriteOutMedium segmentWriteOutMedium, Closer closer)

Method Summary

Modifier and Type	Method	Description
long	getSerializedSize()	Returns the number of bytes, that this Serializer will write to the output _channel_ (not smoosher) on a Serializer.writeTo(java.nio.channels.WritableByteChannel, org.apache.druid.java.util.common.io.smoosh.FileSmoosher) call.
void	open()
void	serialize(ColumnValueSelector<? extends StructuredData> selector)
void	serializeDictionaries(Iterable<String> strings, Iterable<Long> longs, Iterable<Double> doubles)
void	serializeFields(SortedMap<String,FieldTypeInfo.MutableTypeSet> fields)
void	writeTo(WritableByteChannel channel, FileSmoosher smoosher)	Writes the serialized form of this object.

Methods inherited from class java.lang.Object

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

Field Detail

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

RAW_FILE_NAME

public static final String RAW_FILE_NAME

See Also:

Constant Field Values

NULL_BITMAP_FILE_NAME

public static final String NULL_BITMAP_FILE_NAME

See Also:

Constant Field Values

NESTED_FIELD_PREFIX

public static final String NESTED_FIELD_PREFIX

See Also:

Constant Field Values

Constructor Detail

NestedDataColumnSerializerV4

public NestedDataColumnSerializerV4(String name,
                                    IndexSpec indexSpec,
                                    SegmentWriteOutMedium segmentWriteOutMedium,
                                    Closer closer)

Method Detail

open

public void open()
          throws IOException

Specified by:

open in interface GenericColumnSerializer<StructuredData>

Throws:

IOException

serializeFields

public void serializeFields(SortedMap<String,FieldTypeInfo.MutableTypeSet> fields)
                     throws IOException

Throws:

IOException

serializeDictionaries

public void serializeDictionaries(Iterable<String> strings,
                                  Iterable<Long> longs,
                                  Iterable<Double> doubles)
                           throws IOException

Throws:

IOException

serialize

public void serialize(ColumnValueSelector<? extends StructuredData> selector)
               throws IOException

Specified by:

serialize in interface GenericColumnSerializer<StructuredData>

Throws:

IOException

getSerializedSize

public long getSerializedSize()
                       throws IOException

Description copied from interface: Serializer

Returns the number of bytes, that this Serializer will write to the output _channel_ (not smoosher) on a Serializer.writeTo(java.nio.channels.WritableByteChannel, org.apache.druid.java.util.common.io.smoosh.FileSmoosher) call.

Specified by:

getSerializedSize in interface Serializer

Throws:

IOException

writeTo

public void writeTo(WritableByteChannel channel,
                    FileSmoosher smoosher)
             throws IOException

Description copied from interface: Serializer

Writes the serialized form of this object. The entire object may be written to the provided channel, or the object may be split over the provided channel and files added to the {@link FileSmoosher], where additional channels can be created via FileSmoosher.addWithSmooshedWriter(String, long). The latter approach is useful when the serialized form of the object is too large for a single smoosh container. At the time this javadoc was written, the max smoosh container size is limit to the max ByteBuffer size.

Specified by:

writeTo in interface Serializer

Throws:

IOException