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/*
* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.StringWriter;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Collections;
public class CustomEditor implements AutoCloseable {
public static final int SOURCE_CODE = 0;
public static final int GET_SOURCE_CODE = 1;
public static final int REMOVE_CODE = 2;
public static final int EXIT_CODE = -1;
public static final int ACCEPT_CODE = -2;
public static final int CANCEL_CODE = -3;
private final Socket socket;
private final Path path;
private final StringWriter writer;
private final String source;
public CustomEditor(int port, String fileName) throws IOException {
this.socket = new Socket((String) null, port);
this.path = Paths.get(fileName);
this.writer = new StringWriter();
this.source = new String(Files.readAllBytes(path), StandardCharsets.UTF_8);
}
public void loop() throws IOException {
DataInputStream input = new DataInputStream(new BufferedInputStream(socket.getInputStream()));
DataOutputStream output = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream()));
while (true) {
int cmd = input.readInt();
switch (cmd) {
case EXIT_CODE: {
Files.write(path, Collections.singletonList(writer.toString()));
return;
}
case GET_SOURCE_CODE: {
byte[] bytes = source.getBytes(StandardCharsets.UTF_8);
output.writeInt(bytes.length);
output.write(bytes);
output.flush();
break;
}
case REMOVE_CODE: {
// only for external editor
Files.delete(path);
break;
}
case CANCEL_CODE: {
return;
}
case ACCEPT_CODE: {
Files.write(path, Collections.singletonList(writer.toString()));
break;
}
case SOURCE_CODE: {
int length = input.readInt();
byte[] bytes = new byte[length];
input.readFully(bytes);
writer.write(new String(bytes, StandardCharsets.UTF_8));
break;
}
}
}
}
public static void main(String[] args) throws IOException {
if (args.length != 2) {
System.err.println("Usage: port file");
System.exit(1);
}
try (CustomEditor editor = new CustomEditor(Integer.parseInt(args[0]), args[1])) {
editor.loop();
}
}
@Override
public void close() throws IOException {
socket.close();
}
}
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