Fatal error is called for valid surrogate characters
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Key: XERCESJ-1063
URL: http://issues.apache.org/jira/browse/XERCESJ-1063
Project: Xerces2-J
Type: Bug
Components: Serialization
Versions: 2.6.2
Reporter: Serghei Balaban
I use XMLSerializer and XML11Serializer to generate xml messages. When I was
testing my application, I found that valid surrogate characters can be
misinterpreted in printText( char[],int,int,boolean,boolean) methods of
XMLSerializer and XML11Serializer classes. In excerpt from XMLSerializer.java
(CVS apache.org) you can see that the variable length is decremented while the
variable start is incremented, so when start>length the check for surrogate is
never called and the fatal error is raised:
protected void printText( char[] chars, int start, int length,
boolean preserveSpace, boolean unescaped ) throws
IOException {
int index;
char ch;
if ( preserveSpace ) {
// Preserving spaces: the text must print exactly as it is,
// without breaking when spaces appear in the text and without
// consolidating spaces. If a line terminator is used, a line
// break will occur.
while ( length-- > 0 ) {
ch = chars[ start ];
++start;
if (!XMLChar.isValid(ch)) {
// check if it is surrogate
if (++start <length) {
surrogates(ch, chars[start]);
} else {
fatalError("The character '"+(char)ch+"' is an invalid
XML character");
}
continue;
}
if ( unescaped )
_printer.printText( ch );
else
printXMLChar( ch );
}
} else {
// Not preserving spaces: print one part at a time, and
// use spaces between parts to break them into different
// lines. Spaces at beginning of line will be stripped
// by printing mechanism. Line terminator is treated
// no different than other text part.
while ( length-- > 0 ) {
ch = chars[ start ];
++start;
if (!XMLChar.isValid(ch)) {
// check if it is surrogate
if (++start <length) {
surrogates(ch, chars[start]);
} else {
fatalError("The character '"+(char)ch+"' is an invalid
XML character");
}
continue;
}
if ( unescaped )
_printer.printText( ch );
else
printXMLChar( ch );
}
}
}
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