com.davidehrmann.vcdiff.engine

Class JSONCodeTableWriter

java.lang.Object

com.davidehrmann.vcdiff.engine.JSONCodeTableWriter

All Implemented Interfaces:

VCDiffCodeTableWriter<Appendable>

public class JSONCodeTableWriter
extends Object
implements VCDiffCodeTableWriter<Appendable>

Constructor Summary

Constructors

Constructor and Description
JSONCodeTableWriter()

Method Summary

Modifier and Type	Method and Description
void	add(byte[] data, int offset, int length) encode an ADD opcode with the "size" length starting at offset
void	addChecksum(int checksum) add a checksum to the code table
void	copy(int offset, int size) encode a COPY opcode with args "offset" (into dictionary) and "size" bytes.
void	finishEncoding(Appendable out) Finishes encoding.
void	init(int dictionarySize) Initializes the constructed object for use.
void	output(Appendable out) Appends the encoded delta window to the output string.
void	run(int size, byte b) encode a RUN opcode for "size" copies of the value "b".
void	writeHeader(Appendable out, EnumSet<VCDiffFormatExtension> formatExtensions) Writes the header to the output string.

Methods inherited from class java.lang.Object

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

Constructor Detail

JSONCodeTableWriter

public JSONCodeTableWriter()

Method Detail

init

public void init(int dictionarySize)

Description copied from interface: VCDiffCodeTableWriter

Initializes the constructed object for use. It will return false if there was an error initializing the object, or true if it was successful. After the object has been initialized and used, init() can be called again to restore the initial state of the object.

Specified by:

init in interface VCDiffCodeTableWriter<Appendable>

Parameters:

dictionarySize - size of the dictionary being used

add

public void add(byte[] data,
                int offset,
                int length)

Description copied from interface: VCDiffCodeTableWriter

encode an ADD opcode with the "size" length starting at offset

Specified by:

add in interface VCDiffCodeTableWriter<Appendable>

Parameters:

data - data to add

offset - offset in data to start from

length - total bytes to add

addChecksum

public void addChecksum(int checksum)

Description copied from interface: VCDiffCodeTableWriter

add a checksum to the code table

Specified by:

addChecksum in interface VCDiffCodeTableWriter<Appendable>

Parameters:

checksum - checksum to write to the writer

copy

public void copy(int offset,
                 int size)

Description copied from interface: VCDiffCodeTableWriter

encode a COPY opcode with args "offset" (into dictionary) and "size" bytes.

Specified by:

copy in interface VCDiffCodeTableWriter<Appendable>

Parameters:

offset - offset into the dictionary to copy data from

size - number of bytes to copy from dictionary

finishEncoding

public void finishEncoding(Appendable out)
                    throws IOException

Description copied from interface: VCDiffCodeTableWriter

Finishes encoding.

Specified by:

finishEncoding in interface VCDiffCodeTableWriter<Appendable>

Parameters:

out - writer mechanism to write to

Throws:

IOException - if there's an exception writing to out

output

public void output(Appendable out)
            throws IOException

Description copied from interface: VCDiffCodeTableWriter

Appends the encoded delta window to the output string.

Specified by:

output in interface VCDiffCodeTableWriter<Appendable>

Parameters:

out - writer mechanism to write to

Throws:

IOException - if there's an exception writing to out

run

public void run(int size,
                byte b)

Description copied from interface: VCDiffCodeTableWriter

encode a RUN opcode for "size" copies of the value "b".

Specified by:

run in interface VCDiffCodeTableWriter<Appendable>

Parameters:

size - number of copies of the value to write

b - byte value to write

writeHeader

public void writeHeader(Appendable out,
                        EnumSet<VCDiffFormatExtension> formatExtensions)
                 throws IOException

Description copied from interface: VCDiffCodeTableWriter

Writes the header to the output string.

Specified by:

writeHeader in interface VCDiffCodeTableWriter<Appendable>

Parameters:

out - writer mechanism to write to

formatExtensions - Flags for enabling features that are extensions to the format

Throws:

IOException - if there's an exception writing to out