/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library 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 library 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 library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.shell.io;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import org.jnode.util.WriterOutputStream;
/**
* This CommandIO implementation supports output streams. The API methods
* for getting input streams and readers are not supported here.
*
* @author crawley@jnode.org
*/
public class CommandOutput extends BaseCommandIO {
private Writer writer;
private PrintWriter printWriter;
private OutputStream outputStream;
private PrintStream printStream;
public CommandOutput(OutputStream outputStream) {
super(outputStream);
this.outputStream = deproxy(outputStream);
}
public CommandOutput(Writer writer) {
super(writer);
this.writer = writer;
}
public synchronized OutputStream getOutputStream() {
if (outputStream == null) {
boolean isConsole = writer instanceof ShellConsoleWriter;
outputStream = new WriterOutputStream(writer, getEncoding(), !isConsole);
}
return outputStream;
}
public PrintStream getPrintStream(boolean autoflush) {
if (printStream == null) {
if (outputStream instanceof PrintStream) {
printStream = (PrintStream) outputStream;
} else {
printStream = new PrintStream(getOutputStream(), autoflush);
}
}
return printStream;
}
public synchronized Writer getWriter() throws CommandIOException {
if (writer == null) {
try {
writer = new OutputStreamWriter(outputStream, getEncoding());
} catch (UnsupportedEncodingException ex) {
throw new CommandIOException("Cannot get writer", ex);
}
}
return writer;
}
public PrintWriter getPrintWriter(boolean autoflush) {
if (printWriter == null) {
if (writer instanceof PrintWriter) {
printWriter = (PrintWriter) writer;
} else {
printWriter = new PrintWriter(getWriter(), autoflush);
}
}
return printWriter;
}
public final int getDirection() {
return DIRECTION_OUT;
}
void doClose() throws IOException {
flush();
if (printWriter != null) {
printWriter.close();
}
if (printStream != null) {
printStream.close();
}
if (writer != null) {
writer.close();
}
if (outputStream != null) {
outputStream.close();
}
}
void doFlush() throws IOException {
if (writer != null) {
writer.flush();
}
if (outputStream != null) {
outputStream.flush();
}
if (printWriter != null) {
printWriter.flush();
}
if (printStream != null) {
printStream.flush();
}
}
@Override
public InputStream getInputStream() {
throw new CommandIOException("Input not supported");
}
@Override
public Reader getReader() throws CommandIOException {
throw new CommandIOException("Input not supported");
}
}