/* ====================================================================
* BBC Syndication Server 1.0
*
* Copyright (c) 2002-2003 The BBC. All rights reserved.
*
*/
package org.apache.jetspeed.util;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
/**
* <P>Utility functions related to Streams</P>
*
* @author <a href="mailto:taylor@apache.org">David Sean Taylor</a>
* @version $Id: Streams.java,v 1.2 2003/04/23 01:44:52 taylor Exp $
*/
public class Streams
{
static final int BLOCK_SIZE=4096;
public static void drain(InputStream r,OutputStream w) throws IOException
{
byte[] bytes=new byte[BLOCK_SIZE];
try
{
int length=r.read(bytes);
while(length!=-1)
{
if(length!=0)
{
w.write(bytes,0,length);
}
length=r.read(bytes);
}
}
finally
{
bytes=null;
}
}
public static void drain(Reader r,Writer w) throws IOException
{
char[] bytes=new char[BLOCK_SIZE];
try
{
int length=r.read(bytes);
while(length!=-1)
{
if(length!=0)
{
w.write(bytes,0,length);
}
length=r.read(bytes);
}
}
finally
{
bytes=null;
}
}
public static void drain(Reader r,OutputStream os) throws IOException
{
Writer w=new OutputStreamWriter(os);
drain(r,w);
w.flush();
}
public static byte[] drain(InputStream r) throws IOException
{
ByteArrayOutputStream bytes=new ByteArrayOutputStream();
drain(r,bytes);
return bytes.toByteArray();
}
public static void drain(InputStream is, Writer w) throws IOException
{
Reader r = new InputStreamReader(is);
drain(r,w);
w.flush();
}
public static String getAsString(InputStream is)
{
int c=0;
char lineBuffer[]=new char[128], buf[]=lineBuffer;
int room= buf.length, offset=0;
try
{
loop: while (true)
{
// read chars into a buffer which grows as needed
switch (c = is.read() )
{
case -1: break loop;
default: if (--room < 0)
{
buf = new char[offset + 128];
room = buf.length - offset - 1;
System.arraycopy(lineBuffer, 0,
buf, 0, offset);
lineBuffer = buf;
}
buf[offset++] = (char) c;
break;
}
}
}
catch(IOException ioe)
{
ioe.printStackTrace();
}
if ((c == -1) && (offset == 0))
{
return null;
}
return String.copyValueOf(buf, 0, offset);
}
public static String getAsString(Reader is)
{
int c=0;
char lineBuffer[]=new char[128], buf[]=lineBuffer;
int room= buf.length, offset=0;
try
{
loop: while (true)
{
// read chars into a buffer which grows as needed
switch (c = is.read() )
{
case -1: break loop;
default: if (--room < 0)
{
buf = new char[offset + 128];
room = buf.length - offset - 1;
System.arraycopy(lineBuffer, 0,
buf, 0, offset);
lineBuffer = buf;
}
buf[offset++] = (char) c;
break;
}
}
}
catch(IOException ioe)
{
ioe.printStackTrace();
}
if ((c == -1) && (offset == 0))
{
return null;
}
return String.copyValueOf(buf, 0, offset);
}
}