XMLLayout and CData tag

[Be...@helpsystems.com]

  I'm using an XMLLayout [log4j 1.3.0 alpha] to write events to an XML 
file, and I'm getting invalid CData tags in my XML file. What's happening 
is that on occasion, a 'binary' character, such as 0x01 is being passed 
into the event's message. When the XMLLayout formats the message, it 
passes it off to Transform.appendEscapingCDATA, which doesn't replace the 
0x01 character with a valid XML character replacement.  According to the 
"official" XML spec, the valid CData chars are: 0x9, 0xA, 0xD, and just 
about anything from 0x20 on up. http://www.w3.org/TR/REC-xml/#NT-Char

  The easy answer would be "well, don't put non-text characters in the 
message", that doesn't work in my case. I wanted to see if anyone has a 
better solution before I spend all of 10 minutes updating my own copy of 
the Transform class to "fix" these 'binary' characters.

  Thanks!
    --Ben

Here's a sample of the invalid XML file, and here's the error when I try 
to read it in:

log4j:ERROR Parsing error on line 2 and column -1
log4j:ERROR Illegal XML character:  .
org.xml.sax.SAXParseException: Illegal XML character:  .
    at org.apache.crimson.parser.InputEntity.fatal(InputEntity.java:1100)
    at 
org.apache.crimson.parser.InputEntity.unparsedContent(InputEntity.java:665)
    at org.apache.crimson.parser.Parser2.content(Parser2.java:1979)
    at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1691)
    at org.apache.crimson.parser.Parser2.content(Parser2.java:1963)
    at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1691)
    at org.apache.crimson.parser.Parser2.content(Parser2.java:1963)
    at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1691)
    at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:667)
    at org.apache.crimson.parser.Parser2.parse(Parser2.java:337)
    at 
org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:448)
    at 
org.apache.crimson.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:185)
    at org.apache.log4j.xml.XMLDecoder.parse(XMLDecoder.java:133)
    at org.apache.log4j.xml.XMLDecoder.decodeEvents(XMLDecoder.java:209)