uka.patch
Class PatchReader

java.lang.Object
  uka.patch.PatchReader

All Implemented Interfaces:

Constants, PatchInput

public abstract class PatchReader

extends java.lang.Object

implements PatchInput, Constants

Parser for the patch wire protocol created with a PatchWriter object. This class implements the wire protocol part of the PatchInput interface.

Field Summary

(package private) int	booleanCnt
(package private) boolean	booleanValue
(package private) int	diffCnt
(package private) int	doubleCnt
(package private) double	doubleValue
(package private) int	floatCnt
(package private) float	floatValue
(package private) int	fromRank
(package private) UnmarshalStream	in
(package private) int	intCnt
(package private) int	intValue
(package private) LayeredObjectSpace	layeredObjectSpace
(package private) int	longCnt
(package private) long	longValue
(package private) int	notModifiedCnt
(package private) int	objectCnt
(package private) java.lang.Object	objectValue

Fields inherited from interface uka.patch.Constants

CODE_BOOLEAN, CODE_DOUBLE, CODE_END_OF_PATCH, CODE_FLOAT, CODE_INT16, CODE_INT32, CODE_INT64, CODE_INT8, CODE_NOT_MODIFIED, CODE_NULL, CODE_PATCH_HEADER, CODE_REFERENCE, MAX_DISTRIBUTION_RECORDS

Constructor Summary

PatchReader(ObjectSpace objects)

PatchReader(ObjectSpace objects, int fromRank)

Method Summary

void	beginPatch()
int	beginPatchRecord()
void	clear()
void	endPatch()
void	endPatchRecord()
boolean	getDiffAsBoolean()
byte	getDiffAsByte()
char	getDiffAsChar()
double	getDiffAsDouble()
float	getDiffAsFloat()
int	getDiffAsInt() Reads the updated value, if a patch record is available.
long	getDiffAsLong()
java.lang.Object	getDiffAsObject() Reads the updated reference value, if the last call to hasDiff() returned true.
short	getDiffAsShort()
int	getFromRank() Experimental low-level API.
UnmarshalStream	getInput() Experimental low-level API: Patch creation for the expert.
UnmarshalStream	getUnmarshalStream()
boolean	hasDiff() Checks whether there is a patch record available for the next instance variable.
ObjectSpace	init()
void	installOverlay()
int	rawReadInt()
void	setUnmarshalStream(UnmarshalStream in)
void	uninstallOverlay()

Methods inherited from class java.lang.Object

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

Methods inherited from interface uka.patch.PatchInput

applyPatchAnonymous

Field Detail

fromRank

int fromRank

in

UnmarshalStream in

layeredObjectSpace

LayeredObjectSpace layeredObjectSpace

diffCnt

int diffCnt

notModifiedCnt

int notModifiedCnt

booleanCnt

int booleanCnt

booleanValue

boolean booleanValue

intCnt

int intCnt

intValue

int intValue

longCnt

int longCnt

longValue

long longValue

floatCnt

int floatCnt

floatValue

float floatValue

doubleCnt

int doubleCnt

doubleValue

double doubleValue

objectCnt

int objectCnt

objectValue

java.lang.Object objectValue

Constructor Detail

PatchReader

public PatchReader(ObjectSpace objects)
            throws java.io.IOException

PatchReader

public PatchReader(ObjectSpace objects,
                   int fromRank)
            throws java.io.IOException

Method Detail

setUnmarshalStream

public void setUnmarshalStream(UnmarshalStream in)

getUnmarshalStream

public UnmarshalStream getUnmarshalStream()

init

public ObjectSpace init()

beginPatch

public void beginPatch()
                throws java.io.IOException

Throws:

java.io.IOException

endPatch

public void endPatch()
              throws java.io.IOException,
                     java.lang.ClassNotFoundException

Throws:

java.io.IOException

java.lang.ClassNotFoundException

clear

public void clear()

installOverlay

public void installOverlay()

uninstallOverlay

public void uninstallOverlay()

beginPatchRecord

public int beginPatchRecord()
                     throws java.io.IOException

Throws:

java.io.IOException

endPatchRecord

public void endPatchRecord()
                    throws java.io.IOException

Throws:

java.io.IOException

hasDiff

public boolean hasDiff()
                throws java.io.IOException,
                       java.lang.ClassNotFoundException

Description copied from interface: PatchInput

Checks whether there is a patch record available for the next instance variable.

Specified by:

hasDiff in interface PatchInput

Throws:

java.io.IOException

java.lang.ClassNotFoundException

See Also:

Patchable.applyPatch(java.lang.Object, uka.patch.PatchInput)

getDiffAsBoolean

public boolean getDiffAsBoolean()
                         throws java.io.IOException

Specified by:

getDiffAsBoolean in interface PatchInput

Throws:

java.io.IOException

See Also:

PatchInput.getDiffAsInt()

getDiffAsByte

public byte getDiffAsByte()
                   throws java.io.IOException

Specified by:

getDiffAsByte in interface PatchInput

Throws:

java.io.IOException

See Also:

PatchInput.getDiffAsInt()

getDiffAsChar

public char getDiffAsChar()
                   throws java.io.IOException

Specified by:

getDiffAsChar in interface PatchInput

Throws:

java.io.IOException

See Also:

PatchInput.getDiffAsInt()

getDiffAsShort

public short getDiffAsShort()
                     throws java.io.IOException

Specified by:

getDiffAsShort in interface PatchInput

Throws:

java.io.IOException

See Also:

PatchInput.getDiffAsInt()

getDiffAsInt

public int getDiffAsInt()
                 throws java.io.IOException

Description copied from interface: PatchInput

Reads the updated value, if a patch record is available.

Specified by:

getDiffAsInt in interface PatchInput

Throws:

java.io.IOException

See Also:

PatchInput.hasDiff(), Patchable.applyPatch(java.lang.Object, uka.patch.PatchInput)

getDiffAsFloat

public float getDiffAsFloat()
                     throws java.io.IOException

Specified by:

getDiffAsFloat in interface PatchInput

Throws:

java.io.IOException

See Also:

PatchInput.getDiffAsInt()

getDiffAsLong

public long getDiffAsLong()
                   throws java.io.IOException

Specified by:

getDiffAsLong in interface PatchInput

Throws:

java.io.IOException

See Also:

PatchInput.getDiffAsInt()

getDiffAsDouble

public double getDiffAsDouble()
                       throws java.io.IOException

Specified by:

getDiffAsDouble in interface PatchInput

Throws:

java.io.IOException

See Also:

PatchInput.getDiffAsInt()

getDiffAsObject

public java.lang.Object getDiffAsObject()
                                 throws java.io.IOException

Description copied from interface: PatchInput

Reads the updated reference value, if the last call to PatchInput.hasDiff() returned true. The returned object reference is assigned to the currently patched instance variable of the patchable object and the corresponding instance variable of its backup copy.

Specified by:

getDiffAsObject in interface PatchInput

Throws:

java.io.IOException

rawReadInt

public int rawReadInt()
               throws java.io.IOException

Throws:

java.io.IOException

getInput

public UnmarshalStream getInput()
                         throws java.io.IOException

Experimental low-level API: Patch creation for the expert.

Specified by:

getInput in interface PatchInput

Returns:

the underlying stream for raw unmarshaling.

Throws:

java.io.IOException

getFromRank

public int getFromRank()

Experimental low-level API.

Specified by:

getFromRank in interface PatchInput

Returns:

the rank that sent the corresponding patch.