org.apache.derby.client.net
Class EbcdicCcsidManager

java.lang.Object
  org.apache.derby.client.net.CcsidManager
      org.apache.derby.client.net.EbcdicCcsidManager

public class EbcdicCcsidManager
extends CcsidManager

A concrete implementation of a CcsidMgr used to convert between Java UCS2 and Ebcdic as needed to handle character DDM Parameters. This implementation only supports converting from the ASCII invariant of UNICODE to Ebcdic. This should be fine since this class is intended for converting DDM Parameter data only.

Field Summary

private static int[]	conversionArrayToEbcdic
private static int[]	conversionArrayToUCS2

Fields inherited from class org.apache.derby.client.net.CcsidManager

dot_, numToCharRepresentation_, numToSnaRequiredCrrtknChar_, space_, UTF8_CCSID

Constructor Summary

EbcdicCcsidManager()

Method Summary

byte[]	convertFromJavaString(java.lang.String sourceString, Agent agent)
(package private) java.lang.String	convertToJavaString(byte[] sourceBytes, int offset, int numToConvert)
boolean	encode(java.nio.CharBuffer src, java.nio.ByteBuffer dest, Agent agent) Encode the contents of a CharBuffer into a ByteBuffer.
void	startEncoding() Initialize this instance for encoding a new string.

Methods inherited from class java.lang.Object

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

Field Detail

conversionArrayToEbcdic

private static final int[] conversionArrayToEbcdic

conversionArrayToUCS2

private static final int[] conversionArrayToUCS2

Constructor Detail

EbcdicCcsidManager

public EbcdicCcsidManager()

Method Detail

convertFromJavaString

public byte[] convertFromJavaString(java.lang.String sourceString,
                                    Agent agent)
                             throws SqlException

Specified by:

convertFromJavaString in class CcsidManager

Throws:

SqlException

startEncoding

public void startEncoding()

Description copied from class: CcsidManager

Initialize this instance for encoding a new string. This method resets any internal state that may be left after earlier calls to CcsidManager.encode(java.nio.CharBuffer, java.nio.ByteBuffer, org.apache.derby.client.am.Agent) on this instance. For example, it may reset the internal java.nio.charset.CharsetEncoder, if the implementation uses one to do the encoding.

Specified by:

startEncoding in class CcsidManager

encode

public boolean encode(java.nio.CharBuffer src,
                      java.nio.ByteBuffer dest,
                      Agent agent)
               throws SqlException

Description copied from class: CcsidManager

Encode the contents of a CharBuffer into a ByteBuffer. The method will return true if all the characters were encoded and copied to the destination. If the receiving byte buffer is too small to hold the entire encoded representation of the character buffer, the method will return false. The caller should then allocate a larger byte buffer, copy the contents from the old byte buffer to the new one, and then call this method again to get the remaining characters encoded.

Specified by:

encode in class CcsidManager

Parameters:

src - buffer holding the characters to encode

dest - buffer receiving the encoded bytes

agent - where to report errors

Returns:

true if all characters were encoded, false if the destination buffer is full and there still are more characters to encode

Throws:

SqlException - if the characters cannot be encoded using this CCSID manager's character encoding

convertToJavaString

java.lang.String convertToJavaString(byte[] sourceBytes,
                                     int offset,
                                     int numToConvert)

Specified by:

convertToJavaString in class CcsidManager