/**************************************************************************
* Copyright (c) 2001 by Punch Telematix. All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* 1. Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* 2. Redistributions in binary form must reproduce the above copyright *
* notice, this list of conditions and the following disclaimer in the *
* documentation and/or other materials provided with the distribution. *
* 3. Neither the name of Punch Telematix nor the names of *
* other contributors may be used to endorse or promote products *
* derived from this software without specific prior written permission.*
* *
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED *
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF *
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. *
* IN NO EVENT SHALL PUNCH TELEMATIX OR OTHER CONTRIBUTORS BE LIABLE *
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR *
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF *
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR *
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, *
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE *
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN *
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
**************************************************************************/
/*
** $Id: BufferedWriter.java,v 1.3 2006/10/04 14:24:14 cvsroot Exp $
*/
package java.io;
public class BufferedWriter extends Writer {
private static final int DEFAULT_BUFFER_SIZE = 8192;
private int bufsize;
private int bufcounter;
private char[] buf;
private boolean closed;
private Writer out;
private String line_separator;
public BufferedWriter(Writer out) {
this (out,DEFAULT_BUFFER_SIZE);
}
public BufferedWriter(Writer out, int size) {
super(out);
if (size < 1 ) {
throw new IllegalArgumentException();
}
this.out = out;
this.bufsize = size;
this.bufcounter = 0;
this.buf = new char[this.bufsize];
line_separator = GetSystemProperty.LINE_SEPARATOR;
}
public void close() throws IOException {
synchronized (lock) {
if (!closed) {
closed = true;
out.write(buf,0,bufcounter);
buf = null;
out.close();
}
}
}
public void flush() throws IOException {
if (closed) {
throw new IOException();
}
synchronized (lock) {
out.write(buf,0,bufcounter);
bufcounter = 0;
out.flush();
}
}
public void newLine() throws IOException {
write(line_separator,0,line_separator.length());
}
public void write(int oneChar) throws IOException {
synchronized (lock) {
if (closed) {
throw new IOException();
}
if (bufcounter == bufsize) {
out.write(buf);
buf[0] = (char)oneChar;
bufcounter = 1;
}
else {
buf[bufcounter++] = (char)oneChar;
}
}
}
public void write(char[] cbuf, int offset, int count) throws IOException {
synchronized (lock) {
//sanity checks
if (closed) throw new IOException();
if (offset < 0 || count < 0 || offset > cbuf.length - count) throw new ArrayIndexOutOfBoundsException();
if (count >= bufsize) {
if (bufcounter != 0) {
out.write(buf,0,bufcounter);
bufcounter=0;
}
out.write(cbuf,offset,count);
}
else {
if (bufcounter+count<bufsize) {
System.arraycopy(cbuf,offset,buf,bufcounter,count);
bufcounter+=count;
if (bufcounter >= bufsize) {
out.write(buf);
bufcounter=0;
}
}
else { int help=bufsize-bufcounter;
System.arraycopy(cbuf,offset,buf,bufcounter,help);
out.write(buf);
bufcounter=count-help;
System.arraycopy(cbuf,offset+help,buf,0,bufcounter);
}
}
}
}
public void write(String str, int offset, int count) throws IOException {
synchronized (lock) {
if (closed) throw new IOException();
if (offset < 0 || count < 0 || offset > str.length() - count) throw new StringIndexOutOfBoundsException("offset = " + offset + ", count = " + count + ", length = " + str.length());
if (bufcounter+count<bufsize) {
str.getChars(offset,offset+count,buf,bufcounter);
bufcounter+=count;
if (bufcounter >= bufsize) {
out.write(buf);
bufcounter=0;
}
}
else {
int help=bufsize-bufcounter;
str.getChars(offset,offset+help,buf,bufcounter);
out.write(buf);
count-=help;
offset+=help;
while (count >= bufsize) {
str.getChars(offset,offset+bufsize,buf,0);
out.write(buf);
count-=bufsize;
offset+=bufsize;
}
str.getChars(offset,offset+count,buf,0);
bufcounter=count;
}
}
}
}