co.cask.cdap.internal.io

Class ReflectionDatumWriter<T>

java.lang.Object

co.cask.cdap.internal.io.ReflectionWriter<Encoder,T>

co.cask.cdap.internal.io.ReflectionDatumWriter<T>

Type Parameters:

T - Type T to be written.

All Implemented Interfaces:

DatumWriter<T>

public final class ReflectionDatumWriter<T>
extends ReflectionWriter<Encoder,T>
implements DatumWriter<T>

A DatumWriter that uses java reflection to encode data. The encoding schema it uses is the same as the binary encoding as specified in Avro, with the enhancement of support for non-string map keys.

Field Summary

Fields inherited from class co.cask.cdap.internal.io.ReflectionWriter

schema, seenRefs

Constructor Summary

Constructors

Constructor and Description
ReflectionDatumWriter(co.cask.cdap.api.data.schema.Schema schema)

Method Summary

Methods

Modifier and Type	Method and Description
void	encode(T data, Encoder encoder)
co.cask.cdap.api.data.schema.Schema	getSchema()
protected void	writeArray(Encoder encoder, Collection<?> col, co.cask.cdap.api.data.schema.Schema componentSchema)
protected void	writeArray(Encoder encoder, Object array, co.cask.cdap.api.data.schema.Schema componentSchema)
protected void	writeBool(Encoder encoder, Boolean val)
protected void	writeBytes(Encoder encoder, byte[] val)
protected void	writeBytes(Encoder encoder, ByteBuffer val)
protected void	writeDouble(Encoder encoder, Double val)
protected void	writeEnum(Encoder encoder, String val, co.cask.cdap.api.data.schema.Schema schema)
protected void	writeFloat(Encoder encoder, Float val)
protected void	writeInt(Encoder encoder, int val)
protected void	writeLong(Encoder encoder, long val)
protected void	writeMap(Encoder encoder, Map<?,?> map, Map.Entry<co.cask.cdap.api.data.schema.Schema,co.cask.cdap.api.data.schema.Schema> mapSchema)
protected void	writeNull(Encoder encoder)
protected void	writeString(Encoder encoder, String val)
protected void	writeUnion(Encoder encoder, Object val, co.cask.cdap.api.data.schema.Schema schema)

Methods inherited from class co.cask.cdap.internal.io.ReflectionWriter

write, write, writeRecord

Methods inherited from class java.lang.Object

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

Constructor Detail

ReflectionDatumWriter

public ReflectionDatumWriter(co.cask.cdap.api.data.schema.Schema schema)

Method Detail

getSchema

public co.cask.cdap.api.data.schema.Schema getSchema()

encode

public void encode(T data,
          Encoder encoder)
            throws IOException

Specified by:

encode in interface DatumWriter<T>

Throws:

IOException

writeNull

protected void writeNull(Encoder encoder)
                  throws IOException

Specified by:

writeNull in class ReflectionWriter<Encoder,T>

Throws:

IOException

writeBool

protected void writeBool(Encoder encoder,
             Boolean val)
                  throws IOException

Specified by:

writeBool in class ReflectionWriter<Encoder,T>

Throws:

IOException

writeInt

protected void writeInt(Encoder encoder,
            int val)
                 throws IOException

Specified by:

writeInt in class ReflectionWriter<Encoder,T>

Throws:

IOException

writeLong

protected void writeLong(Encoder encoder,
             long val)
                  throws IOException

Specified by:

writeLong in class ReflectionWriter<Encoder,T>

Throws:

IOException

writeFloat

protected void writeFloat(Encoder encoder,
              Float val)
                   throws IOException

Specified by:

writeFloat in class ReflectionWriter<Encoder,T>

Throws:

IOException

writeDouble

protected void writeDouble(Encoder encoder,
               Double val)
                    throws IOException

Specified by:

writeDouble in class ReflectionWriter<Encoder,T>

Throws:

IOException

writeString

protected void writeString(Encoder encoder,
               String val)
                    throws IOException

Specified by:

writeString in class ReflectionWriter<Encoder,T>

Throws:

IOException

writeBytes

protected void writeBytes(Encoder encoder,
              ByteBuffer val)
                   throws IOException

Specified by:

writeBytes in class ReflectionWriter<Encoder,T>

Throws:

IOException

writeBytes

protected void writeBytes(Encoder encoder,
              byte[] val)
                   throws IOException

Specified by:

writeBytes in class ReflectionWriter<Encoder,T>

Throws:

IOException

writeEnum

protected void writeEnum(Encoder encoder,
             String val,
             co.cask.cdap.api.data.schema.Schema schema)
                  throws IOException

Specified by:

writeEnum in class ReflectionWriter<Encoder,T>

Throws:

IOException

writeArray

protected void writeArray(Encoder encoder,
              Collection<?> col,
              co.cask.cdap.api.data.schema.Schema componentSchema)
                   throws IOException

Specified by:

writeArray in class ReflectionWriter<Encoder,T>

Throws:

IOException

writeArray

protected void writeArray(Encoder encoder,
              Object array,
              co.cask.cdap.api.data.schema.Schema componentSchema)
                   throws IOException

Specified by:

writeArray in class ReflectionWriter<Encoder,T>

Throws:

IOException

writeMap

protected void writeMap(Encoder encoder,
            Map<?,?> map,
            Map.Entry<co.cask.cdap.api.data.schema.Schema,co.cask.cdap.api.data.schema.Schema> mapSchema)
                 throws IOException

Specified by:

writeMap in class ReflectionWriter<Encoder,T>

Throws:

IOException

writeUnion

protected void writeUnion(Encoder encoder,
              Object val,
              co.cask.cdap.api.data.schema.Schema schema)
                   throws IOException

Specified by:

writeUnion in class ReflectionWriter<Encoder,T>

Throws:

IOException