Convert outputstream to inputstream

mohamed_en

I have method that returns outputstream and I want to pass this to another method that takes inputstream as a parameter
is it possible ?

kmhonsy

Dear Mohamed,
well you cant do that since these are 2 different types of streams, but why dont you post what your code is about and i think it will be more helpful.
Regards

mohamed_en

i have outputstream that write(buffer); and inputstream that read(buffer)
and it is the same buffer means one class write and the other read but they are 2 applications and they uses sockets but i want them one program so i used file to write buffer then i read buffer again from file
but there is a lot of processing is there is any solutions sorry for not write the code it seems to be complicated.

DrRakha

why don't you make client and server , using sockets ?

kmhonsy

well you can create a third class -assuming that write is in a class diffrent than read- and create two objects one from write and one from read, and the shared buffer you want to use, and start using the operations u want
e.g.
MyWriter write= new ...;
MyReader read=new ...;
String buffer;
read.read(buffer);
if(buffer!=null)
write.write(buffer);

i hope i understand your problem right and i hope my answer helps you.

dvd.smnt

If your data can fits into memory the best way is to first write the data to a ByteArrayOutputStream, then get the byte array and make a new ByteArrayInputStream from the previous byte array.

Code:

ByteArrayOutputStream buffer=new ByteArrayOutputStream();
write(buffer);
InputStream is=new ByteArrayInputStream(buffer.toByteArray());
...

Another possibility is to write your data to a temporary file and read it back.
A third possibility is to use java pipes (PipeInputStream and PipeOutputStream) this last possibility involve to make a new thread and it's quite complicated. I suggest you have a look to http://io-tools.googlecode.com (OutputStreamToInputStream class).

DrRakha

thanks alot

Helma

Code sample below converts inputstream to outputstream.
Code:

Code:

import java.io.*; 
public class InputToOutputStream { 
public static void main( String args[] ) throws IOException 
{
 InputStream in = new FileInputStream ( "InputToOutputStream.java" ); 
 OutputStream out = System.out; 
 int nextChar;
  while ( ( nextChar = in.read() ) != -1 ) 
out.write( Character.toUpperCase( (char) nextChar ) ); 
out.write( '\n' );
 out.flush(); 
} }

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Convert outputstream to inputstream

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