File.readLine() broken, returns null on empty lines.
Article ID: KB0085876
Updated On:
| Products | Versions |
|---|---|
| TIBCO BusinessEvents Enterprise Edition | - |
| Not Applicable | - |
Description
Description:
The catalog function File.readLine() returns null when it encounters the first empty line in a file. The file is terminated with CRLF (0x0D, 0x0A). This causes a for next loop break on the first empty line of the input file. File.readLine() should return null only when the end of file (EOF) is reached.
Sample code:
Object sFile = File.openFile("c:/temp/file.txt");
for(String line2=File.fileReadLine(sFile); line2 != null; line2=File.fileReadLine(sFile)) {
System.debugOut(line2);
}
Symptoms:
File.readLine() returns null when it encouters the first empty line in a file.
Cause:
Product issue (CR BE-21025)
The catalog function File.readLine() returns null when it encounters the first empty line in a file. The file is terminated with CRLF (0x0D, 0x0A). This causes a for next loop break on the first empty line of the input file. File.readLine() should return null only when the end of file (EOF) is reached.
Sample code:
Object sFile = File.openFile("c:/temp/file.txt");
for(String line2=File.fileReadLine(sFile); line2 != null; line2=File.fileReadLine(sFile)) {
System.debugOut(line2);
}
This terminates not when encountering the end-of-file as it should and
did with previous versions, but on the first empty line. Note that
checking line2==null is the only way to check if you encounter the
end-of-file, since there is no function like "File.isEOF()"
Symptoms:
File.readLine() returns null when it encouters the first empty line in a file.
Cause:
Product issue (CR BE-21025)
Issue/Introduction
File.readLine() broken, returns null on empty lines.
Resolution
CR BE-21025 has been fixed in TIBCO BusinessEvents 5.1.3HF1
NOTE: Catalog function works in previous versions - issue occurs in 5.1.3 (base) only
As a workaround, use the catalog function File.readFileAsString().
Example:
String sFile= File.readFileAsString("<filename>");
String [] s1=split(sFile,"\n");
for (int i=0;i<s1@length;i++)
{
System.debugOut("### line[" + i +"]:"+ s1[i]);
}
NOTE: Catalog function works in previous versions - issue occurs in 5.1.3 (base) only
As a workaround, use the catalog function File.readFileAsString().
Example:
String sFile= File.readFileAsString("<filename>");
String [] s1=split(sFile,"\n");
for (int i=0;i<s1@length;i++)
{
System.debugOut("### line[" + i +"]:"+ s1[i]);
}
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