First off Thank you for the excellent library, it has been very useful
in my current project.
However there are a couple of issues I have found.
Using UnifiedJexl with the following script will fail at line 2 and line
4 and line 5.
Note: line numbers are only for reference, they are not in script
1:<report>
2:
3:$$ var x = 2;
4:
5: $$ var y = 9;
7:</report>
The offending code is the method startsWith which can be found at line
1345 in UnifiedJEXL.java
protected int startsWith(CharSequence sequence, CharSequence
pattern) {
int s = 0;
while (Character.isSpaceChar(sequence.charAt(s))) {
s += 1;
}
sequence = sequence.subSequence(s, sequence.length());
if (pattern.length() <= sequence.length()
&& sequence.subSequence(0,
pattern.length()).equals(pattern)) {
return s + pattern.length();
} else {
return -1;
}
}
Problem is that sequence is not tested to see if the index is available
before trying to access it.
Using this non optimized code fixes the issue:
protected int startsWith(CharSequence sequence, CharSequence
pattern) {
String tempString = sequence.toString();
int patternFoundAt =
tempString.indexOf(pattern.toString());
if(patternFoundAt != -1 ){
int result = patternFoundAt +
pattern.length();
if( result >= sequence.length() )
return -1;
else
return result;
}
return patternFoundAt;
}
Code used to load the report is:
String templatePath =
"template.rpt";
JexlEngine engine = new
JexlEngine();
UnifiedJEXL processor = new UnifiedJEXL(engine);
Reader scriptReader = new
FileReader(templatePath);
UnifiedJEXL.Template template =
PreProcessor.getInstance().prepareTemplate(scriptReader);
JexlContext context = new MapContext();
StringWriter preprocessed = new StringWriter();
template.evaluate(context, preprocessed );
This seems like a bug unless I am not using the library correctly?
Thank you once again for great library.
Clay
Clay Bruce
Web Developer
Quiktrak, Inc.
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