Appending, overwriting to a file, using BufferedWriter

I have modify a file using BufferedWriter, plz suggest

To append to a file with a BufferedWriter, use getBuffWriterForAppend(String filename)
FileWriter fw = new FileWriter(filename, true);
return new BufferedWriter(fw);
} If you want to overwrite some of the contents, I think you need a RandomAccessFile. This doesn't appear to be usable with a BufferedWriter (unless you want to create a big wrapper - the BufferedWriter wrapping an OutputStreamWriter wrapping a PipedOutputStream which is connected to a PipedInputStream which has another thread reading from it and copying to the RandomAccessFile).
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Appending Data in XML File using JAXB

I need to write the 50,000 records into XML file. But at a time i need to write only 1000 records into XML. How do i append the data into XML using JAXB.

I have tried but the data is written in the following way:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Users xmlns="http://www.yyyy.com/umc/importer/jaxb">
<User id="101" xmlns="">
<username>gjhs</username>
<password>hdfhhdf</password>
<role>df</role>
<email>sdd</email>
<phone>sdfdf</phone>
<description>shkl</description>
<property name="ernnker" value="hkdfhk"/>
</User>
</Users>
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Users xmlns="http://www.yyyy.com/umc/importer/jaxb">
<User id="101" xmlns="">
<username>gjhs</username>
<password>hdfhhdf</password>
<role>df</role>
<email>sdd</email>
<phone>sdfdf</phone>
<description>shkl</description>
<property name="ernnker" value="hkdfhk"/>
</User>
</Users>
If i can eliminate the following lines from the above files then my job is done:
</Users>
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
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Append to remote FTP file using Pharlap

Hi
Currently a colleague of mine has managed to write data from our cFP 2020 to a remote file on an FTP server (using the FTP buffer VI in Labview 7.0). However there does not appear to be any way that he can append additional readings to that file. I would like to know if there is a way to append data to the remote FTP file. We are interested in storing 1 minute's worth of 3.3 second data within the remote file. Our SQL server will then import the flat file every minute into the database.
So my question is, how can I append data readings from my cFP 2020 to remote files on an FTP server?
--Thor

Hi Thor,
You’ll want to look into the NI LabVIEW Internet Toolkit that will allow you to programmatically send and retrieve files from a remote FTP server.
Additionally, I have attached an example program to demonstrate how to send/retrive files programmatically using the FTP VIs. Note that you will need to have the Internet Toolkit in order to see the FTP VIs.
Hope this helps. Thanks again.
Kileen

Appending Objects to a File using serialization

hi,
I was wondering if I can append objects in a single file. For example, suppose there are 2 .java files. 1st file creates the Serialized file caleed sl.dat, opens it, writes the object, close it down.
The 2nd file nw open that same file, sl.dat, in append mode, writes one more object and close it down.
next I want to read each object of the file. Will it work in this fashion?
I found a quite interesting discussion here. but it says that it is not possible.. is that true?
Any clue? Is there any other mean to achieve this?

arin wrote:
kajbj wrote:
I've done it by subclassing ObjectOutputStream. I could then add a constructor that took an argument that indicated if a header should be written or not.Can you explain what I need to done here... I have a class which extends ObjectOutputStream but what to do after that? What do u mean by header in the constructor?? Please help meYou do know that you have the source code for the class if you have a JDK? The source for ObjectOutputStream is in the src.zip.
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Kaj

Append in same file using GUI_DOWNLOAD file type is pdf

Hi All
I have three internal tables and want to append in same pdf file using GUI_DOWNLOAD . My problem is this when i m using the same file it overwrites it i also mark APPEND = 'X' . Can anybody help me how can i append.
Thanks
Viki

Hi
Try
http://help.sap.com/saphelp_nw04/helpdata/en/60/f8123e9c6c498084f9f2bafab32671/content.htm
/people/sap.user72/blog/2004/11/10/bsphowto-generate-pdf-output-from-a-bsp
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/c2567f2b-0b01-0010-b7b5-977cbf80665d
https://www.sdn.sap.com/irj/sdn?rid=/webcontent/uuid/24b9e126-0b01-0010-e098-f46384fad9f3 [original link is broken]
Regards
Raj

Appending XML data to a file using file adaptor

Hi,
I am trying to append data to a file using file adaptor in XML format. (Objective is to store data as XML message in the file). I understand it is possible to append data to an existing file by making appropriate changes in WSDL manually. However, my issue is every time the XML data is appended to a file even the XML header message is also getting appended. As a result the file data does not adhere to defined schema structure anymore.
Is there a way to save XML data in a file in append mode ?
Thanks, Riz

I am having the same issue as well, which makes the output XML an invalid one. I have an XSD that has a hierarchy of elements. whenever I am wiriting the child elements the header message & the name space is also getting written. For example
<?xml version="1.0" ?><Parent xmlns="http://testSchema.com/outputSchema">
<StartDate>01/01/2001</StartDate>
<EndDate>01/30/2001</EndDate>
<Child/>
</Parent>
<?xml version="1.0" ?><Child xmlns:ns1="http://testSchema.com/outputSchema">
<ns1:Id>20012981</ns1:Id>
<ns1:Value/>
<ns1:Date>01/15/2001</ns1:Date>
</Child>
<?xml version="1.0" ?><Child xmlns:ns1="http://testSchema.com/outputSchema">
<ns1:Id>20012981</ns1:Id>
<ns1:Value/>
<ns1:Date>01/15/2001</ns1:Date>
</Child>
I am using a onefile adapter partnerlink to write the parent & an another one for writing the child element, since the child elements will repeat more than once. One other way to fix this issue is write the data using java embedded activity, but that would need a lot of boiler plate code, for writing/reading/appending the same file & for handling all those IOexceptions & buffer IN/outs. I am curious if someone had the same issue & how they resolved it.

Can I append date to the file name using Bursting

Hi All,
I know that we can append date to the file using %y, %m and %d for
Email
FTP
WEBDAV
But is there any way of appending the date to the file name if I am bursting my file to a shared location.
I tried that %y, %m and %d but that doesn't work for bursting.
Please reply
Thanks,
Ronny

If this requirment is for EBS, please refer the following blog
http://blogs.oracle.com/BIDeveloper/2010/08/xdoburstrpt_passing_parameters.html
For standalone see the following delivery sql query as example.
select
d.department_name KEY,
'Standard' TEMPLATE,
'RTF' TEMPLATE_FORMAT,
'en-US' LOCALE,
'PDF' OUTPUT_FORMAT,
'FILE' DEL_CHANNEL,
'C:\Temp' PARAMETER1,
d.department_name||'_'||to_char(sysdate,'mmddyyyy')|| '.pdf' PARAMETER2
from
departments d
Thanks
Ashish

Append data into the file in application server

Hi Friends,
I have an issue where i have a job which has three different stepst for same program. If i run the job the program will create a file in the application server and append the other two steps in the same file without overwriting the file or creating a new file.
My problem is like its creating three different files in application server for that particular job since it has three steps . Its not appending into one particular file .
I am using the FM 'Z_INTERFACE_FILE_WRITE' where i have used the pi_append in the exportng parameter . ITs working when i specify the file in local system. It is appending correctly when i run the report normally to apppend into local system.
But when i schedule a job to append the file in application server its creating three different files.
Kindly help me if anyone is aware of this issue
Thanks in advance
Kishore

Hi,
Please use open dataset to write and append files.Please check the logic of Z FM which you are using .
To open and write into a file use
OPEN DATASET FNAME FOR OUTPUT.
To append data into existing file use
OPEN DATASET FNAME FOR APPENDING.
To write into file:
v_file = file path on application server
OPEN DATASET v_file FOR output.
IF sy-subrc NE 0.
write:/ 'error opening file'.
ELSE.
TRANSFER data TO v_file.
ENDIF.
CLOSE DATASET v_file.
For appending :
OPEN DATASET v_file fOR APPENDING.(file is opened for appending data position is set to the end of the file).
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P.Bharadwaj

Is it possible to overwirte data in a *.pdf file using LabVIEW??

hi,
i have a requirement to overwrite a pdf file using LabVIEW, i have to use coloring text also.
i have downloaded Exaprom PDF 1.0 toolkit. but it is to generate a new pdf file.
please suggest ideas
regards
phani srikanthSpell Check
phani srikanth

Modifying an existing PDF file is several magnitues more complicated than creating one from scratch. The PDF standard is VERY complicated and contains a myriad of features with their specific syntax elements. In order to modify an existing PDF you have to be able to understand every syntax element that occures in the PDF, or you may end up corrupting the file.
When you create a new PDF you can pick out the syntax elements that your tool supports and forget about the 95 other procent.
There are many PDF Toolkits than can create PDF files, a few that can open PDF files and present them, and almost none that can edit them. The Adobe PDF Editor being one of the few that can do that, but nobody is going to give away such a Toolkit for free.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Overwrite the xml file

hi
is there any other possible way to overwrite the xml file
using the javascript ....
Thanks in Advance
~~
SK

Thanks Feldkircher for your reply, But in my Project we are
using javascript , so we can't migrate for Php.
so is it possible to overwrite the xml file by using
javascript . Bcoz after flash produced the xml file i am going to
pass as string to javascript through external Interface. from there
i need to overwrite the xml file by javascript
is it possible to find the solution by this way...
~~
Sk

Using bufferedWriter correctly

im trying to write strings to a text file using bufferedWriter.
im looking at the API but i dont see a function for a whole string just substrings.
is this the class i should be using? thanks!

You are looking for the method write(String) in the API for BufferedWriter?
That method is actually inherited from the class Writer. It is not described explicitly on this API page, but linked to. See the Methods Inherited from... section.
Personally I think I would go wrapping the BufferedWriter in a PrintWriter so the methods such as println() are available.
Cheers,
evnafets

Overwriting texfile using BufferedWriter

Hi. I have a simple servlet that reads values from a textfile into an array using a BufferedWriter and String Tokenizer, and checks one token against a user defined parameter in the web interface.
For example, if the user Id entered in the interface is "Bob", it checks each line in the array (the specific token) for "Bob" - if it is the same, it replaces the values in that row of the array with the user defined variables for Bob (password, home directory, etc.)
PROBLEM:
How do I write the array back to the textfile, OVERWRITING the entire file contents? I know I use BufferedWriter - I can append the modified data easily enough - maybe I should be deleting that row of the array and appending a new line to the end?
1) Is there an easier way to read in, compare, modify and write back out line by line?
2) By doing things this way, is there a danger that a maximum array size may be reached? It is a 2D array, fixed columns (6), probably 5000 rows at the very most.
Thanks!!! Geoff

Random access files work best when you know how long each data entry is. Then you can create a class like this {
class DataIO {
    public static String readFixedString(int size, DataInput in) throws IOException {
        StringBuffer b = new StringBuffer(size);
        int i = 0;
        boolean more = true;
        while(more && i < size) {
            char ch = in.readChar();
            i++;
            if (ch == 0) more = false;
            else b.append(ch);
        in.skipBytes(2 * (size - i));
        return b.toString();
    public static void writeFixedString(String s, int size, DataOutput out) throws IOException {
        int i;
        for (i = 0; i < size; i++) {
            char ch = 0;
            if (i < s.length()) ch = s.charAt(i);
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}That class has two static methods that write and read Strings as Bytes of always equal lenth. Then your RandomAccessFile object could perform like this:
// open RandomAccessFile with "rw" for read and write
RandomAccessFile out = new RandomAccessFile("employee.dat", "rw");
// look for record number
int recordNum = 5
// write after recordNum
out.seek(recordNum * RECORD_SIZE) //The record size being defined by you
DataIO.writeFixedString("yourText", RECORD_SIZE, out);
out.close();

Appending a file using i/o

import java.io.Console;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.io.Writer;
import java.io.IOException;
import java.io.File;
class appendfilewritter
public static void main(String args[]) throws IOException
Console c=System.console();
File f=new File("appendmytxt.txt");
PrintWriter out=new PrintWriter(f);
try
if(c==null)
System.out.println("Console is NULL");
System.exit(1);
String str;
str=c.readLine("Enter the string:");
if(f.exists())
out.append(str);
else
f.createNewFile();
System.out.println("File created");
out.println(str);
System.out.println("Your Text is written in file");
catch(IOException e)
System.out.println("Exception:"+e);
finally
he
if(out!=null)
out.close();
When we compile this code the respective .txt file is generated and text given is written in the file.Now if i had to append more text in the file then during runtime a new file is generated which overwrite the former file...

Take a look at the constructors of [http://java.sun.com/j2se/1.4.2/docs/api/java/io/FileWriter.html|http://java.sun.com/j2se/1.4.2/docs/api/java/io/FileWriter.html] .
P.S. You do not need to use
if(f.exists())
out.append(str);
else
f.createNewFile();
System.out.println("File created");
out.println(str);
}Just open the file in append mode and use it. If the file does not exist it will be created.

Help on appending a file using FileConnection

i have a very small MIDlet application in which it just ask the user to input the names, grades and gender and it saves the record into a plain text file...
I'm using a FileConnection to access the localfiles and im using "PrintStream" to write to the file... it saves the record but my problem is it wont append to the file if the file aready contains a text... it just simply overwrites my text file instead of appending..
below is the code fragment from my MIDlet Appls:
//.... some code here...
private void createTextFile(String name, String score, String grade) throws IOException{
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         PrintStream printStream=new PrintStream(os);
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          if(!fc.exists())
             fc.create();
          if(printStream!=null)
             printStream.close();
          if(fc!=null)
            fc.close();
//... some code here...-any idea on how to make it append if the file already contains values?
thanks much

Hi,
Have you tried:
fileConnection.openOutputStream(fileConnection.fileSize());or
fileConnection.openOutputStream(Long.MAX_VALUE);For details see javadocs.

Using JavaScript to Print and Overwrite Active Form Files

Hello all,
I have zero knowledge of JavaScript and I am hoping someone can help me
quickly solve an issue I am having with active forms. I tried using the flatten
feature in the action wizard but it is not working. I also tried using
"this.flattenPages()" but I can still edit the fields in my PDF file.
What I am looking for is a JavaScript command that allows me to overwrite the existing
PDF file using the PDF printer and overwrite the active form so it is
finalized. Maybe there is an easier more efficient way to accomplish this? Any
input or help would be much appreciated. I am using Adobe Acrobat XI
Pro. Thanks.
P.S. I realize I can manually selected the Adobe PDF printer and finalize my
active form that way but I am looking for a one click solution.

Have you seen these?
A tutorial on how to flatten form fields:
http://acrobatusers.com/tutorials/how-to-flatten-form-fields
And a free "Flatten Page Content" tool:
http://www.pdfscripting.com/public/Free_Acrobat_Automation_Tools.cfm

Appending, overwriting to a file, using BufferedWriter

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