org.nustaq.serialization

Class FSTObjectOutput

java.lang.Object

org.nustaq.serialization.FSTObjectOutput

All Implemented Interfaces:

DataOutput, ObjectOutput, AutoCloseable

Direct Known Subclasses:

FSTObjectOutputNoShared

public class FSTObjectOutput
extends Object
implements ObjectOutput

replacement of ObjectOutputStream

Field Summary

Fields

Modifier and Type	Field and Description
protected FSTEncoder	codec
protected FSTConfiguration	conf
protected int	curDepth
protected FSTObjectRegistry	objects
protected int	writeExternalWriteAhead

Constructor Summary

Constructors

Constructor and Description
FSTObjectOutput() serialize without an underlying stream, the resulting byte array of writing to this FSTObjectOutput can be accessed using getBuffer(), the size using getWritten().
FSTObjectOutput(FSTConfiguration conf) serialize without an underlying stream, the resulting byte array of writing to this FSTObjectOutput can be accessed using getBuffer(), the size using getWritten().
FSTObjectOutput(OutputStream out) Creates a new FSTObjectOutput stream to write data to the specified underlying output stream.
FSTObjectOutput(OutputStream out, FSTConfiguration conf) Creates a new FSTObjectOutput stream to write data to the specified underlying output stream.

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
void	defaultWriteObject(Object toWrite, FSTClazzInfo serializationInfo)
void	ensureFree(int bytes)
void	flush() Flushes this data output stream.
byte[]	getBuffer()
FSTClazzInfoRegistry	getClassInfoRegistry()
FSTConfiguration	getConf()
byte[]	getCopyOfWrittenBuffer()
protected FSTClazzInfo	getFstClazzInfo(FSTClazzInfo.FSTFieldInfo referencee, Class clazz) if class is same as last referenced, returned cached clzinfo, else do a lookup
FSTObjectRegistry	getObjectMap()
ObjectOutputStream	getObjectOutputStream(Class cl, FSTClazzInfo clinfo, FSTClazzInfo.FSTFieldInfo referencee, Object toWrite)
int	getWriteExternalWriteAhead() since the stock writeXX methods on InputStream are final, i can't ensure sufficient bufferSize on the output buffer before calling writeExternal.
int	getWritten()
protected void	objectHasBeenWritten(Object obj, int oldStreamPosition, int streamPosition) hook for debugging profiling. empty impl, you need to subclass to make use of this hook
protected void	objectWillBeWritten(Object obj, int streamPosition) hook for debugging profiling. empty impl, you need to subclass to make use of this hook
void	resetForReUse() reset keeping the last used byte[] buffer
void	resetForReUse(byte[] out)
void	resetForReUse(OutputStream out) if out == null => automatically create/reuse a bytebuffer
void	setWriteExternalWriteAhead(int writeExternalWriteAhead) since the stock writeXX methods on InputStream are final, i can't ensure sufficient bufferSize on the output buffer before calling writeExternal.
void	write(byte[] b)
void	write(byte[] b, int off, int len)
void	write(int b)
protected void	writeArray(FSTClazzInfo.FSTFieldInfo referencee, Object array)
void	writeBoolean(boolean v)
void	writeByte(int v)
void	writeBytes(String s)
void	writeChar(int v)
void	writeChars(String s)
void	writeClassTag(Class aClass)
void	writeDouble(double v)
void	writeFloat(float v)
void	writeInt(int v)
void	writeLong(long v)
void	writeObject(Object obj)
void	writeObject(Object obj, Class... possibles)
protected void	writeObjectCompatible(FSTClazzInfo.FSTFieldInfo referencee, Object toWrite, FSTClazzInfo serializationInfo)
protected boolean	writeObjectHeader(FSTClazzInfo clsInfo, FSTClazzInfo.FSTFieldInfo referencee, Object toWrite)
void	writeObjectInternal(Object obj, Class... possibles)
protected void	writeObjectWithContext(FSTClazzInfo.FSTFieldInfo referencee, Object toWrite)
void	writeShort(int v)
void	writeStringUTF(String str)
void	writeUTF(String s)

Methods inherited from class java.lang.Object

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

Field Detail

codec

protected FSTEncoder codec

conf

protected FSTConfiguration conf

objects

protected FSTObjectRegistry objects

curDepth

protected int curDepth

writeExternalWriteAhead

protected int writeExternalWriteAhead

Constructor Detail

FSTObjectOutput

public FSTObjectOutput(OutputStream out)

Creates a new FSTObjectOutput stream to write data to the specified underlying output stream. uses Default Configuration singleton

FSTObjectOutput

public FSTObjectOutput(OutputStream out,
               FSTConfiguration conf)

Creates a new FSTObjectOutput stream to write data to the specified underlying output stream. The counter written is set to zero. Don't create a FSTConfiguration with each stream, just create one global static configuration and reuse it. FSTConfiguration is threadsafe.

Parameters:

out - the underlying output stream, to be saved for later use.

FSTObjectOutput

public FSTObjectOutput(FSTConfiguration conf)

serialize without an underlying stream, the resulting byte array of writing to this FSTObjectOutput can be accessed using getBuffer(), the size using getWritten(). Don't create a FSTConfiguration with each stream, just create one global static configuration and reuse it. FSTConfiguration is threadsafe.

Parameters:

conf -

Throws:

IOException

FSTObjectOutput

public FSTObjectOutput()

serialize without an underlying stream, the resulting byte array of writing to this FSTObjectOutput can be accessed using getBuffer(), the size using getWritten(). Note once you call close or flush, the tmp byte array is lost. (grab array before flushing/closing) uses default configuration singleton

Throws:

IOException

Method Detail

flush

public void flush()
           throws IOException

Flushes this data output stream. This forces any buffered output bytes to be written out to the stream.

The flush method of DataOutputStream calls the flush method of its underlying output stream.

Specified by:

flush in interface ObjectOutput

Throws:

IOException - if an I/O error occurs.

See Also:

FilterOutputStream.out, OutputStream.flush()

close

public void close()
           throws IOException

Specified by:

close in interface ObjectOutput

Specified by:

close in interface AutoCloseable

Throws:

IOException

getWriteExternalWriteAhead

public int getWriteExternalWriteAhead()

since the stock writeXX methods on InputStream are final, i can't ensure sufficient bufferSize on the output buffer before calling writeExternal. Default value is 5000 bytes. If you make use of the externalizable interface and write larger Objects a) cast the ObjectOutput in readExternal to FSTObjectOutput and call ensureFree on this in your writeExternal method or b) statically set a sufficient maximum using this method.

setWriteExternalWriteAhead

public void setWriteExternalWriteAhead(int writeExternalWriteAhead)

since the stock writeXX methods on InputStream are final, i can't ensure sufficient bufferSize on the output buffer before calling writeExternal. Default value is 5000 bytes. If you make use of the externalizable interface and write larger Objects a) cast the ObjectOutput in readExternal to FSTObjectOutput and call ensureFree on this in your writeExternal method or b) statically set a sufficient maximum using this method.

Parameters:

writeExternalWriteAhead -

ensureFree

public void ensureFree(int bytes)
                throws IOException

Throws:

IOException

writeObject

public void writeObject(Object obj)
                 throws IOException

Specified by:

writeObject in interface ObjectOutput

Throws:

IOException

write

public void write(int b)
           throws IOException

Specified by:

write in interface DataOutput

Specified by:

write in interface ObjectOutput

Throws:

IOException

write

public void write(byte[] b)
           throws IOException

Specified by:

write in interface DataOutput

Specified by:

write in interface ObjectOutput

Throws:

IOException

write

public void write(byte[] b,
         int off,
         int len)
           throws IOException

Specified by:

write in interface DataOutput

Specified by:

write in interface ObjectOutput

Throws:

IOException

writeBoolean

public void writeBoolean(boolean v)
                  throws IOException

Specified by:

writeBoolean in interface DataOutput

Throws:

IOException

writeByte

public void writeByte(int v)
               throws IOException

Specified by:

writeByte in interface DataOutput

Throws:

IOException

writeShort

public void writeShort(int v)
                throws IOException

Specified by:

writeShort in interface DataOutput

Throws:

IOException

writeChar

public void writeChar(int v)
               throws IOException

Specified by:

writeChar in interface DataOutput

Throws:

IOException

writeInt

public void writeInt(int v)
              throws IOException

Specified by:

writeInt in interface DataOutput

Throws:

IOException

writeLong

public void writeLong(long v)
               throws IOException

Specified by:

writeLong in interface DataOutput

Throws:

IOException

writeFloat

public void writeFloat(float v)
                throws IOException

Specified by:

writeFloat in interface DataOutput

Throws:

IOException

writeDouble

public void writeDouble(double v)
                 throws IOException

Specified by:

writeDouble in interface DataOutput

Throws:

IOException

writeBytes

public void writeBytes(String s)
                throws IOException

Specified by:

writeBytes in interface DataOutput

Throws:

IOException

writeChars

public void writeChars(String s)
                throws IOException

Specified by:

writeChars in interface DataOutput

Throws:

IOException

writeUTF

public void writeUTF(String s)
              throws IOException

Specified by:

writeUTF in interface DataOutput

Throws:

IOException

writeObject

public void writeObject(Object obj,
               Class... possibles)
                 throws IOException

Throws:

IOException

writeObjectInternal

public void writeObjectInternal(Object obj,
                       Class... possibles)
                         throws IOException

Throws:

IOException

objectWillBeWritten

protected void objectWillBeWritten(Object obj,
                       int streamPosition)

hook for debugging profiling. empty impl, you need to subclass to make use of this hook

Parameters:

obj -

streamPosition -

objectHasBeenWritten

protected void objectHasBeenWritten(Object obj,
                        int oldStreamPosition,
                        int streamPosition)

hook for debugging profiling. empty impl, you need to subclass to make use of this hook

Parameters:

obj -

oldStreamPosition -

streamPosition -

writeObjectWithContext

protected void writeObjectWithContext(FSTClazzInfo.FSTFieldInfo referencee,
                          Object toWrite)
                               throws IOException

Throws:

IOException

getFstClazzInfo

protected FSTClazzInfo getFstClazzInfo(FSTClazzInfo.FSTFieldInfo referencee,
                           Class clazz)

if class is same as last referenced, returned cached clzinfo, else do a lookup

defaultWriteObject

public void defaultWriteObject(Object toWrite,
                      FSTClazzInfo serializationInfo)
                        throws IOException

Throws:

IOException

writeObjectCompatible

protected void writeObjectCompatible(FSTClazzInfo.FSTFieldInfo referencee,
                         Object toWrite,
                         FSTClazzInfo serializationInfo)
                              throws IOException

Throws:

IOException

writeObjectHeader

protected boolean writeObjectHeader(FSTClazzInfo clsInfo,
                        FSTClazzInfo.FSTFieldInfo referencee,
                        Object toWrite)
                             throws IOException

Parameters:

clsInfo -

referencee -

toWrite -

Returns:

true if header already wrote object

Throws:

IOException

writeArray

protected void writeArray(FSTClazzInfo.FSTFieldInfo referencee,
              Object array)
                   throws IOException

Throws:

IOException

writeStringUTF

public void writeStringUTF(String str)
                    throws IOException

Throws:

IOException

resetForReUse

public void resetForReUse(OutputStream out)

if out == null => automatically create/reuse a bytebuffer

Parameters:

out -

resetForReUse

public void resetForReUse()

reset keeping the last used byte[] buffer

resetForReUse

public void resetForReUse(byte[] out)

getClassInfoRegistry

public FSTClazzInfoRegistry getClassInfoRegistry()

getObjectOutputStream

public ObjectOutputStream getObjectOutputStream(Class cl,
                                       FSTClazzInfo clinfo,
                                       FSTClazzInfo.FSTFieldInfo referencee,
                                       Object toWrite)
                                         throws IOException

Parameters:

cl - - class or superclass of currently serialized obj, write declared fields of this class only

clinfo -

referencee -

toWrite -

Returns:

Throws:

IOException

getObjectMap

public FSTObjectRegistry getObjectMap()

getBuffer

public byte[] getBuffer()

Returns:

the written buffer reference. use getWritten() to obtain the length of written bytes. WARNING: if more than one objects have been written, an implicit flush is triggered, so the buffer only contains the last written object. getWritten() then has a larger size than the buffer length. only usable if one single object is written to the stream (e.g. messaging)

getCopyOfWrittenBuffer

public byte[] getCopyOfWrittenBuffer()

Returns:

a copy of written bytes. Warning: if the stream has been flushed, this will fail with an exception. a flush is triggered after each 1st level writeObject.

getConf

public FSTConfiguration getConf()

getWritten

public int getWritten()

Returns:

the number of bytes written to this stream. This also is the number of valid bytes in the buffer one obtains from the various getBuffer, getCopyOfBuffer methods. Warning: if the stream has been flushed (done after each 1st level object write), the buffer will be smaller than the value given here or contain invalid bytes.

writeClassTag

public void writeClassTag(Class aClass)