com.objsys.asn1j.runtime

Class Asn1EncodeByteBufferRev

java.lang.Object

com.objsys.asn1j.runtime.Asn1MessageBufferBase

com.objsys.asn1j.runtime.Asn1MessageBuffer

com.objsys.asn1j.runtime.Asn1EncodeBuffer

com.objsys.asn1j.runtime.Asn1EncodeByteBufferRev

Direct Known Subclasses:

Asn1BerEncodeBuffer

public abstract class Asn1EncodeByteBufferRev
extends Asn1EncodeBuffer

An encoding buffer that fills the underlying array in reverse order. This is useful for encoding rules like BER, where we encode fields in reverse order.

Field Summary

Fields

Modifier and Type	Field and Description
protected int	mByteIndex
protected byte[]	mData

Fields inherited from class com.objsys.asn1j.runtime.Asn1EncodeBuffer

INITIAL_SIZE

Fields inherited from class com.objsys.asn1j.runtime.Asn1MessageBufferBase

context, mTypeCode

Constructor Summary

Constructors

Constructor and Description
Asn1EncodeByteBufferRev() The default constructor initializes the encode buffer to the default buffer size (INITIAL_SIZE bytes).
Asn1EncodeByteBufferRev(int size) This constructor allows specification of the initial size.

Method Summary

Modifier and Type	Method and Description
protected void	checkSize(int bytesRequired) This method determines if the encode buffer can hold the requested number of bytes.
void	copy(byte value) This method copies a single byte to the encode buffer.
void	copy(byte[] value) This method copies multiple bytes to the encode buffer
void	copy(byte[] value, int startOffset, int length) This method copies multiple bytes to the encode buffer
void	copy(java.lang.String value) This method copies a character string into the encode buffer
java.io.ByteArrayInputStream	getByteArrayInputStream() This method returns a reference to a byte array input stream representing the encoded message.
byte[]	getMsgCopy() This method returns the encoded message in a byte array.
int	getMsgLength() This method returns the length of the encoded message component.
protected void	initBuffer(int size)
void	reset() This method resets the buffer to allow a new record to be encoded into it.
java.lang.String	toString() This method will return a string representation of the data in the encode buffer.
void	write(java.io.OutputStream out) This method writes the encoded record to the given output stream.

Methods inherited from class com.objsys.asn1j.runtime.Asn1EncodeBuffer

binDump, binDump, encodeIntSigned, encodeIntUnsigned, getInputStream, getMinimalOctetsSigned, getMinimalOctetsUnsigned, getOutputStream, hexDump, hexDump

Methods inherited from class com.objsys.asn1j.runtime.Asn1MessageBuffer

addNamedEventHandler, getEventHandlerListCount, hasEventHandlers, invokeCharacters, invokeEndElement, invokeStartElement, setEventHandlerList

Methods inherited from class com.objsys.asn1j.runtime.Asn1MessageBufferBase

getContext, hexDump, hexDump, setKey, setTypeCode

Methods inherited from class java.lang.Object

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

Field Detail

mByteIndex

protected int mByteIndex

mData

protected byte[] mData

Constructor Detail

Asn1EncodeByteBufferRev

public Asn1EncodeByteBufferRev()

The default constructor initializes the encode buffer to the default buffer size (INITIAL_SIZE bytes).

Asn1EncodeByteBufferRev

public Asn1EncodeByteBufferRev(int size)

This constructor allows specification of the initial size. This overrides the INITIAL_SIZE constant value.

Parameters:

size - initial Buffer size

Method Detail

checkSize

protected void checkSize(int bytesRequired)

This method determines if the encode buffer can hold the requested number of bytes. If not, the buffer is expanded. This treats mByteIndex as unused and reflects the fact that we're writing into the buffer from right to left.

Parameters:

bytesRequired - Number of required bytes.

copy

public void copy(byte value)

This method copies a single byte to the encode buffer.

Specified by:

copy in class Asn1EncodeBuffer

Parameters:

value - The byte value to copy

copy

public void copy(byte[] value)
          throws Asn1Exception

This method copies multiple bytes to the encode buffer

Overrides:

copy in class Asn1EncodeBuffer

Parameters:

value - Array of bytes to copy to the encode buffer

Throws:

Asn1Exception

copy

public void copy(byte[] value,
                 int startOffset,
                 int length)
          throws Asn1Exception

This method copies multiple bytes to the encode buffer

Specified by:

copy in class Asn1EncodeBuffer

Parameters:

value - Array of bytes to copy to the encode buffer

startOffset - The first byte copied is value[offset]

length - The last byte copied is value[offset + len - 1]

Throws:

Asn1Exception

copy

public void copy(java.lang.String value)

This method copies a character string into the encode buffer

Parameters:

value - String to copy to the encode buffer

getByteArrayInputStream

public java.io.ByteArrayInputStream getByteArrayInputStream()

This method returns a reference to a byte array input stream representing the encoded message. This is the preferred way to access the contents of the encoded message as it is the most efficient.

Specified by:

getByteArrayInputStream in class Asn1EncodeBuffer

Returns:

byte array input stream containing encoded message

getMsgCopy

public final byte[] getMsgCopy()

This method returns the encoded message in a byte array. This is less efficient than the getInputStream method because the message contents must be copied to a newly created byte array.

Specified by:

getMsgCopy in class Asn1EncodeBuffer

Returns:

byte array containing encoded message

getMsgLength

public int getMsgLength()

This method returns the length of the encoded message component.

Specified by:

getMsgLength in class Asn1EncodeBuffer

Returns:

length of encoded message component

initBuffer

protected void initBuffer(int size)

reset

public void reset()

This method resets the buffer to allow a new record to be encoded into it. Any previously encoded data is lost.

Specified by:

reset in class Asn1EncodeBuffer

toString

public java.lang.String toString()

This method will return a string representation of the data in the encode buffer. The format is hex characters.

Overrides:

toString in class java.lang.Object

Returns:

Stringified representation of the value

write

public final void write(java.io.OutputStream out)
                 throws java.io.IOException

This method writes the encoded record to the given output stream.

Specified by:

write in class Asn1EncodeBuffer

Parameters:

out - Output stream to which record is to be written

Throws:

java.io.IOException - for any I/O error.