com.objsys.asn1j.runtime

Class Asn1EncodeBuffer

java.lang.Object

com.objsys.asn1j.runtime.Asn1MessageBufferBase

com.objsys.asn1j.runtime.Asn1MessageBuffer

com.objsys.asn1j.runtime.Asn1EncodeBuffer

Direct Known Subclasses:

Asn1BerEncodeBuffer, Asn1PerEncodeBuffer, Asn1XerEncodeBuffer, Asn1XmlEncodeBuffer

public abstract class Asn1EncodeBuffer
extends Asn1MessageBuffer

This is the base class to specific encode buffer classes for the different types of encoding rules (BER, DER and PER).

Field Summary

Fields

Modifier and Type	Field and Description
static int	INITIAL_SIZE This constant specifies the default initial size of the encode buffer.
protected int	mByteIndex
protected byte[]	mData

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

context, mTypeCode

Method Summary

Modifier and Type	Method and Description
abstract void	binDump(java.io.PrintStream out, java.lang.String varName) This method dumps the encoded message in a human-readable format showing a bit trace of all fields to the given print output stream.
void	binDump(java.lang.String varName) This method invokes an overloaded version of binDump to dump the encoded message to standard output.
protected void	checkSize(int bytesRequired) This method determines if the encode buffer can hold the requested number of bytes.
abstract void	copy(byte value) This abstract method is used to copy a single byte to the encode buffer.
abstract void	copy(byte[] value) This method copies multiple bytes to the encode buffer
abstract byte[]	getMsgCopy() This method returns the encoded message in a byte array.
abstract int	getMsgLength() This method returns the length (in bytes) of the encoded message component.
void	hexDump() This method dumps the encoded message in hex/ascii format to the standard output stream.
void	hexDump(java.io.PrintStream out) This method dumps the encoded message in hex/ascii format to the given print output stream.
protected void	initBuffer(int size)
abstract void	reset() This method resets the buffer to allow a new record to be encoded into it.
int	trimBitString(Asn1BitString bitstr) This method will trim a BIT STRING for relevant encodings by removing all zero trailing bits.
abstract 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.Asn1MessageBuffer

addNamedEventHandler, getEventHandlerListCount, getInputStream, 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, toString, wait, wait, wait

Field Detail

mByteIndex

protected int mByteIndex

mData

protected byte[] mData

INITIAL_SIZE

public static final int INITIAL_SIZE

This constant specifies the default initial size of the encode buffer. It is currently set to 1024 bytes.

See Also:

Constant Field Values

Method Detail

binDump

public void binDump(java.lang.String varName)

This method invokes an overloaded version of binDump to dump the encoded message to standard output.

binDump

public abstract void binDump(java.io.PrintStream out,
                             java.lang.String varName)

This method dumps the encoded message in a human-readable format showing a bit trace of all fields to the given print output stream.

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 implementation is shared by the Xml and Xer subclasses. It assumes that the location at mByteIndex is not used, and that the array is filling from 0..n. Ber and Per override this method with slightly different behavior.

Parameters:

bytesRequired - Number of required bytes.

trimBitString

public int trimBitString(Asn1BitString bitstr)

This method will trim a BIT STRING for relevant encodings by removing all zero trailing bits. This is necessary for DER and PER when a BIT STRING contains named bits.

Parameters:

bitstr - An ASN.1 BIT STRING object.

Returns:

Adjusted bit count.

copy

public abstract void copy(byte value)

This abstract method is used to copy a single byte to the encode buffer.

Parameters:

value - The byte value to copy

copy

public abstract void copy(byte[] value)
                   throws Asn1Exception

This method copies multiple bytes to the encode buffer

Parameters:

value - Array of bytes to copy to the encode buffer

Throws:

Asn1Exception

getMsgCopy

public abstract 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.

Returns:

byte array containing encoded message

getMsgLength

public abstract int getMsgLength()

This method returns the length (in bytes) of the encoded message component.

Returns:

length of encoded message component

hexDump

public void hexDump()

This method dumps the encoded message in hex/ascii format to the standard output stream.

hexDump

public void hexDump(java.io.PrintStream out)

This method dumps the encoded message in hex/ascii format to the given print output stream.

Parameters:

out - Output stream object reference

initBuffer

protected void initBuffer(int size)

reset

public abstract void reset()

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

write

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

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

Parameters:

out - Output stream to which record is to be written

Throws:

java.io.IOException