I've done a similar thing, but didn't create the external
CFBufferedReader class. Do you see any reason why the following
wouldn't provide the same?
<cfscript>
filename = "c:\cfusionmx\wwwroot\lineNumberReader.cfm";
fileReader = createObject("java", "java.io.FileReader");
fileReader = fileReader.init(filename);
lineReader = createObject("java","java.io.LineNumberReader");
lineReader = lineReader.init(fileReader);
</cfscript>
<cfset eof = false>
<cfloop condition="not eof">
<cfset thisLine = lineReader.readLine()>
<cfif not isDefined("thisLine")>
<cfset eof = true>
<cfelse>
<cfoutput>#htmlEditFormat(thisLine)#<br></cfoutput>
</cfif>
</cfloop>
(When the lineReader instance hits the end of the file, readLine()
returns a result that causes thisLine to become undefined in the eyes of
CF)
-joe
-----Original Message-----
From: Dick Applebaum [mailto:[EMAIL PROTECTED]
Sent: Wednesday, June 16, 2004 9:22 AM
To: CF-Talk
Subject: Resolved: Out of Memory Error Transforming large XML
file.
Responding to my own message.
Lakers were trounced -- Boo!
Frustrated that I couldn't manipulate a large XML file in CFMX,
I
decided to write a Java program to read a text file, line by
line.
Didn't need to --- found one by Daryl Banttari, at:
http://www.macromedia.com/devnet/server_archive/articles/
leveraging_java_classes_cf.html
This works fine -- takes about 3 seconds to read the 3.8 meg,
85,000
line file.
Interesting!
1) If it is so easy, why not implement it CFML? -- the
CFMX/Java
hybrid solution means extra work when you install or maintain
the app
-- you have to deal with Java source and class files.
2) The routine points out another deficiency in CFML (or at
least
CFML's interface to other languages, like Java) -- CFML cannot
represent/recognize a Null! The programmer had to provide a
work-around.
Don't get me wrong, I am happy to find a solution, and being
able to
interface Java is great!
But, IMO, this should not be necessary (to read a large file,
line-by-line) for a language as rich and powerful as CFML!
Dick
On Jun 15, 2004, at 9:08 PM, Dick Applebaum wrote:
>
> OK!
>
> 1) I can't readLn a file in CF so I read the entire 3.8 meg
xml file
> into RAM
>
> 2) XmlTransform runs out of memory. so I can't use xls to
manipulate
> the file
>
> 3) XmlSearch runs out of memory so I can't use Xpath to
manipulate the
> file
>
> 4) I can CFexecute a Perl program to parse/render the file in
3-4
> seconds
>
> 5) I can convert the 3,8 Meg, 85,000 line file to an
in-memory array
> (Now I have the orig file and the array representation of
this file in
> memory at the same time..
>
> 6) Now, I can line-by-line (array-element-by-array-element)
process
> this file.
>
> What's wrong with this picture --- AFAICT -- everything!
>
> CF is the wrong tool!
>
> Thought I'd never say that!
_____
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