ewe.io
Class Base64Decoder

java.lang.Object
  ewe.util.Errorable
      ewe.io.Base64Codec
          ewe.io.Base64Decoder

All Implemented Interfaces:

DataProcessor

public class Base64Decoder

extends Base64Codec

implements DataProcessor

Field Summary

Fields inherited from class ewe.io.Base64Codec

encodingChars

Fields inherited from class ewe.util.Errorable

error

Constructor Summary

Base64Decoder()

Method Summary

void	closeProcess() This aborts any on-going processing and frees resources associated with the processor.
int	getBlockSize() This returns the size of a block to be processed - any data blocks presented for processing must be multiples of this size.
int	getMaxBlockSize() This returns the largest block that can be processed.
ByteArray	processBlock(byte[] source, int offset, int length, boolean isLast, ByteArray dest) This processes a block of data and places the output in the provided ByteArray.

Methods inherited from class ewe.io.Base64Codec

charToByte, closeEncoding, decode, decode4, encode, encode3

Methods inherited from class ewe.util.Errorable

returnError, returnError, returnError

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, toString

Constructor Detail

Base64Decoder

public Base64Decoder()

Method Detail

closeProcess

public void closeProcess()

Description copied from interface: DataProcessor

This aborts any on-going processing and frees resources associated with the processor. The processor should not be used again after this. An IOException should be thrown if there was an error closing the process.

Specified by:

closeProcess in interface DataProcessor

getBlockSize

public int getBlockSize()

Description copied from interface: DataProcessor

This returns the size of a block to be processed - any data blocks presented for processing must be multiples of this size. If it is less than or equal to 1 it is assumed to be 1.

Specified by:

getBlockSize in interface DataProcessor

getMaxBlockSize

public int getMaxBlockSize()

Description copied from interface: DataProcessor

This returns the largest block that can be processed. Any data blocks presented for processing must be a multiple of getBlockSize() and must be less than or equal to getMaxBlockSize(). If this returns less than or equal to zero then there is no maximum size.

Specified by:

getMaxBlockSize in interface DataProcessor

processBlock

public ByteArray processBlock(byte[] source,
                              int offset,
                              int length,
                              boolean isLast,
                              ByteArray dest)
                       throws IOException

Description copied from interface: DataProcessor

This processes a block of data and places the output in the provided ByteArray. If the ByteArray is null a new one will be created. The ByteArray will be expanded if necessary to hold the output data.

isLastBlock should be set true if this is the last set of data to be processed. If you want to end a processing run, but have no more data to provide - you can set length to be zero (you can then also set inputData to be null) and set isLastBlock true.

If isLastBlock is true the DataProcessor should accept any input data, complete processing and output ALL of any remaining processed data. It should then reset itself so that the next call of processBlock is considered to be the start of a new sequence of data.

If there is an error processing the data, an IOException should be thrown.

Specified by:

processBlock in interface DataProcessor

Throws:

IOException