/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common
* Development and Distribution License("CDDL") (collectively, the
* "License"). You may not use this file except in compliance with the
* License. You can obtain a copy of the License at
* http://www.netbeans.org/cddl-gplv2.html
* or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
* specific language governing permissions and limitations under the
* License. When distributing the software, include this License Header
* Notice in each file and include the License file at
* nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the
* License Header, with the fields enclosed by brackets [] replaced by
* your own identifying information:
* "Portions Copyrighted [year] [name of copyright owner]"
*
* Contributor(s):
*
* The Original Software is NetBeans. The Initial Developer of the Original
* Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
* Microsystems, Inc. All Rights Reserved.
*
* If you wish your version of this file to be governed by only the CDDL
* or only the GPL Version 2, indicate your decision by adding
* "[Contributor] elects to include this software in this distribution
* under the [CDDL or GPL Version 2] license." If you do not indicate a
* single choice of license, a recipient has the option to distribute
* your version of this file under either the CDDL, the GPL Version 2 or
* to extend the choice of license to its licensees as provided above.
* However, if you add GPL Version 2 code and therefore, elected the GPL
* Version 2 license, then the option applies only if the new code is
* made subject to such option by the copyright holder.
*/
import java.io.*;
/**
* This class convert Reader to InputStream. It works by converting
* the characters to the encoding specified in constructor parameter.
*
* @author Petr Hamernik, David Strupl
*/
public class ReaderInputStream extends InputStream {
/** Input Reader class. */
private Reader reader;
private PipedOutputStream pos;
private PipedInputStream pis;
private OutputStreamWriter osw;
/** Creates new input stream from the given reader.
* Uses the platform default encoding.
* @param reader Input reader
*/
public ReaderInputStream(Reader reader) throws IOException {
this.reader = reader;
pos = new PipedOutputStream();
pis = new PipedInputStream(pos);
osw = new OutputStreamWriter(pos);
}
/** Creates new input stream from the given reader and encoding.
* @param reader Input reader
* @param encoding
*/
public ReaderInputStream(Reader reader, String encoding)
throws IOException {
this.reader = reader;
pos = new PipedOutputStream();
pis = new PipedInputStream(pos);
osw = new OutputStreamWriter(pos, encoding);
}
public int read() throws IOException {
if (pis.available() > 0) {
return pis.read();
}
int c = reader.read();
if (c == -1) {
return c;
}
osw.write(c);
osw.flush();
pos.flush();
return pis.read();
}
public int read(byte[] b, int off, int len) throws IOException {
if (len == 0) {
return 0;
}
int c = read();
if (c == -1) {
return -1;
}
b[off] = (byte) c;
int i = 1;
// Don't try to fill up the buffer if the reader is waiting.
for (; (i < len) && reader.ready(); i++) {
c = read();
if (c == -1) {
return i;
}
b[off + i] = (byte) c;
}
return i;
}
public int available() throws IOException {
int i = pis.available();
if (i > 0) {
return i;
}
if (reader.ready()) {
// Char must produce at least one byte.
return 1;
} else {
return 0;
}
}
public void close() throws IOException {
reader.close();
osw.close();
pis.close();
}
}
|