/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.resource.adapter.jdbc.remote;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
import java.io.Serializable;
/**
* @author <a href="mailto:telrod@e2technologies.net">Tom Elrod</a>
* @version $Revision: 71554 $
*/
public class SerializableReader extends Reader implements Serializable
{
/** @since 1.1 */
static final long serialVersionUID = 1244952470388397765L;
private char[] data = null;
protected char buf[];
protected int pos;
protected int mark = 0;
protected int count;
public SerializableReader(Reader reader) throws IOException
{
BufferedReader in = new BufferedReader(reader);
String line = in.readLine();
while (line != null)
{
String current = (data == null) ? "" : new String(data);
String newData = current + line;
data = newData.toCharArray();
line = in.readLine();
}
reader.close();
this.buf = this.data;
this.pos = 0;
this.count = this.buf.length;
}
/**
* Close the stream. Once a stream has been closed, further read(),
* ready(), mark(), or reset() invocations will throw an IOException.
* Closing a previously-closed stream, however, has no effect.
*
* @throws java.io.IOException If an I/O error occurs
*/
public void close() throws IOException
{
// Do nothing
}
/**
* Read characters into a portion of an array. This method will block
* until some input is available, an I/O error occurs, or the end of the
* stream is reached.
*
* @param cbuf Destination buffer
* @param off Offset at which to start storing characters
* @param len Maximum number of characters to read
* @return The number of characters read, or -1 if the end of the
* stream has been reached
* @throws java.io.IOException If an I/O error occurs
*/
public int read(char cbuf[], int off, int len) throws IOException
{
if (cbuf == null)
{
throw new NullPointerException();
}
else if ((off < 0) || (off > cbuf.length) || (len < 0) ||
((off + len) > cbuf.length) || ((off + len) < 0))
{
throw new IndexOutOfBoundsException();
}
if (pos >= count)
{
return -1;
}
if (pos + len > count)
{
len = count - pos;
}
if (len <= 0)
{
return 0;
}
System.arraycopy(buf, pos, cbuf, off, len);
pos += len;
return len;
}
}