public static void main(String[] arguments) {
try {
// read byte data into a byte buffer
String data = "friends.dat";
FileInputStream inData = new FileInputStream(data);
FileChannel inChannel = inData.getChannel();
long inSize = inChannel.size();
ByteBuffer source = ByteBuffer.allocate((int) inSize);
inChannel.read(source, 0);
source.position(0);
System.out.println("Original byte data:");
for (int i = 0; source.remaining() > 0; i++) {
System.out.print(source.get() + " ");
}
// convert byte data into character data
source.position(0);
Charset ascii = Charset.forName("US-ASCII");
CharsetDecoder toAscii = ascii.newDecoder();
CharBuffer destination = toAscii.decode(source);
destination.position(0);
System.out.println("\n\nNew character data:");
for (int i = 0; destination.remaining() > 0; i++) {
System.out.print(destination.get());
}
System.out.println();
} catch (FileNotFoundException fne) {
System.out.println(fne.getMessage());
} catch (IOException ioe) {
System.out.println(ioe.getMessage());
}
}
public static void main(String args[]) throws Exception {
String inputFile = "samplein.txt";
String outputFile = "sampleout.txt";
RandomAccessFile inf = new RandomAccessFile(inputFile, "r");
RandomAccessFile outf = new RandomAccessFile(outputFile, "rw");
long inputLength = new File(inputFile).length();
FileChannel inc = inf.getChannel();
FileChannel outc = outf.getChannel();
MappedByteBuffer inputData = inc.map(FileChannel.MapMode.READ_ONLY, 0, inputLength);
Charset latin1 = Charset.forName("ISO-8859-1");
CharsetDecoder decoder = latin1.newDecoder();
CharsetEncoder encoder = latin1.newEncoder();
CharBuffer cb = decoder.decode(inputData);
// Process char data here
ByteBuffer outputData = encoder.encode(cb);
outc.write(outputData);
inf.close();
outf.close();
}
public static void main(String[] args) throws MessagingException, IOException {
Properties props = new Properties();
try (InputStream in = Files.newInputStream(Paths.get("mail", "mail.properties"))) {
props.load(in);
}
List<String> lines = Files.readAllLines(Paths.get(args[0]), Charset.forName("UTF-8"));
String from = lines.get(0);
String to = lines.get(1);
String subject = lines.get(2);
StringBuilder builder = new StringBuilder();
for (int i = 3; i < lines.size(); i++) {
builder.append(lines.get(i));
builder.append("\n");
}
Console console = System.console();
String password = new String(console.readPassword("Password: "));
Session mailSession = Session.getDefaultInstance(props);
// mailSession.setDebug(true);
MimeMessage message = new MimeMessage(mailSession);
message.setFrom(new InternetAddress(from));
message.addRecipient(RecipientType.TO, new InternetAddress(to));
message.setSubject(subject);
message.setText(builder.toString());
Transport tr = mailSession.getTransport();
try {
tr.connect(null, password);
tr.sendMessage(message, message.getAllRecipients());
} finally {
tr.close();
}
}
/**
* Constructor.
*
* @param enc encoding
* @throws IOException I/O exception
*/
private Generic(final String enc) throws IOException {
try {
csd = Charset.forName(enc).newDecoder();
} catch (final Exception ex) {
throw new EncodingException(ex);
}
}
// Check if the datagramsocket adaptor can send with a packet
// that has not been initialized with an address; the legacy
// datagram socket will send in this case
private static void test2() throws Exception {
DatagramChannel sndChannel = DatagramChannel.open();
sndChannel.socket().bind(null);
InetSocketAddress sender =
new InetSocketAddress(InetAddress.getLocalHost(), sndChannel.socket().getLocalPort());
DatagramChannel rcvChannel = DatagramChannel.open();
rcvChannel.socket().bind(null);
InetSocketAddress receiver =
new InetSocketAddress(InetAddress.getLocalHost(), rcvChannel.socket().getLocalPort());
rcvChannel.connect(sender);
sndChannel.connect(receiver);
byte b[] = "hello".getBytes("UTF-8");
DatagramPacket pkt = new DatagramPacket(b, b.length);
sndChannel.socket().send(pkt);
ByteBuffer bb = ByteBuffer.allocate(256);
rcvChannel.receive(bb);
bb.flip();
CharBuffer cb = Charset.forName("US-ASCII").newDecoder().decode(bb);
if (!cb.toString().startsWith("h")) throw new RuntimeException("Test failed");
// Check that the pkt got set with the target address;
// This is legacy behavior
if (!pkt.getSocketAddress().equals(receiver)) throw new RuntimeException("Test failed");
rcvChannel.close();
sndChannel.close();
}
// Check if DatagramChannel.send while connected can include
// address without throwing
private static void test1() throws Exception {
DatagramChannel sndChannel = DatagramChannel.open();
sndChannel.socket().bind(null);
InetSocketAddress sender =
new InetSocketAddress(InetAddress.getLocalHost(), sndChannel.socket().getLocalPort());
DatagramChannel rcvChannel = DatagramChannel.open();
rcvChannel.socket().bind(null);
InetSocketAddress receiver =
new InetSocketAddress(InetAddress.getLocalHost(), rcvChannel.socket().getLocalPort());
rcvChannel.connect(sender);
sndChannel.connect(receiver);
ByteBuffer bb = ByteBuffer.allocate(256);
bb.put("hello".getBytes());
bb.flip();
int sent = sndChannel.send(bb, receiver);
bb.clear();
rcvChannel.receive(bb);
bb.flip();
CharBuffer cb = Charset.forName("US-ASCII").newDecoder().decode(bb);
if (!cb.toString().startsWith("h")) throw new RuntimeException("Test failed");
rcvChannel.close();
sndChannel.close();
}
/**
* Constructor.
*
* @param os output stream
* @param sopts serializer options
* @throws QueryIOException query I/O exception
*/
protected OutputSerializer(final OutputStream os, final SerializerOptions sopts)
throws QueryIOException {
this.sopts = sopts;
indent = sopts.yes(INDENT);
// project-specific options
indents = sopts.get(INDENTS);
tab = sopts.yes(TABULATOR) ? '\t' : ' ';
encoding = Strings.normEncoding(sopts.get(ENCODING), true);
PrintOutput po;
if (encoding == Strings.UTF8) {
po = PrintOutput.get(os);
} else {
try {
po = new EncoderOutput(os, Charset.forName(encoding));
} catch (final Exception ex) {
throw SERENCODING_X.getIO(encoding);
}
}
final int limit = sopts.get(LIMIT);
if (limit != -1) po.setLimit(limit);
final byte[] nl = token(sopts.get(NEWLINE).newline());
if (nl.length != 1 || nl[0] != '\n') po = new NewlineOutput(po, nl);
out = po;
}
private void recv(SocketChannel sc, ClientInfo ci) throws IOException {
ci.channel.read(ci.inBuf);
ByteBuffer tmpBuf = ci.inBuf.duplicate();
tmpBuf.flip();
int bytesProcessed = 0;
boolean doneLoop = false;
while (!doneLoop) {
byte b;
try {
b = tmpBuf.get();
} catch (BufferUnderflowException bue) {
// Processed all data in buffer
ci.inBuf.clear();
doneLoop = true;
break;
}
switch (b) {
case TypeServerConstants.WELCOME:
bytesProcessed++;
break;
case TypeServerConstants.GET_STRING_REQUEST:
bytesProcessed++;
if (ci.outputPending) {
// Client is backed up. We can't append to
// the byte buffer because it's in the wrong
// state. We could allocate another buffer
// here and change our send method to know
// about multiple buffers, but we'll just
// assume that the client is dead
break;
}
ci.outBuf.put(TypeServerConstants.GET_STRING_RESPONSE);
ByteBuffer strBuf = encoder.encode(testString);
ci.outBuf.putShort((short) strBuf.remaining());
ci.outBuf.put(strBuf);
ci.outBuf.flip();
send(sc, ci);
break;
case TypeServerConstants.GET_STRING_RESPONSE:
int startPos = tmpBuf.position();
try {
int nBytes = tmpBuf.getInt();
byte[] buf = new byte[nBytes];
tmpBuf.get(buf);
bytesProcessed += buf.length + 5;
String s = new String(buf);
// Send the string to the GUI
break;
} catch (BufferUnderflowException bue) {
// Processed all available data
ci.inBuf.position(ci.inBuf.position() + bytesProcessed);
doneLoop = true;
}
break;
}
}
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
resp.setCharacterEncoding("UTF-8");
HttpSession user = req.getSession();
PrintWriter out = resp.getWriter();
SpejdResultAnalyser result = null;
JsonObject response;
JsonReader jsonReader =
Json.createReader(new InputStreamReader(req.getInputStream(), StandardCharsets.ISO_8859_1));
JsonObject jsonObject = jsonReader.readObject();
jsonReader.close();
System.out.println("REQUEST");
System.out.println(jsonObject);
String originalText = jsonObject.getString("text");
int space = jsonObject.getInt("space");
String xml = getXml(originalText, user.getId());
try {
result = new SpejdResultAnalyser(xml.replace("SYSTEM \"xcesAnaIPI.dtd\"", ""));
} catch (ParserConfigurationException | SAXException e) {
out.println(e.toString());
}
assert result != null;
/** do analysis of xml spejd result */
SubstantivePairs pairs = result.doAnalysis().makePair(space);
/**
* create json response { text: ... xml: ... pairs: [ { subst1: ... subst2: ... quantity: ... },
* ...] }
*/
JsonArrayBuilder arrayBuilder = Json.createArrayBuilder();
for (SubstantivePair pair : pairs) {
arrayBuilder.add(
Json.createObjectBuilder()
.add("subst1", pair.getSubst1())
.add("subst2", pair.getSubst2())
.add("quantity", pair.getQuantity()));
}
Charset.forName("UTF-8").encode(originalText);
JsonArray array = arrayBuilder.build();
response =
Json.createObjectBuilder()
.add("text", originalText)
.add("xml", xml)
.add("pairs", array)
.build();
System.out.println("RESPONSE");
System.out.println(response);
out.print(response);
}
/**
* Get text content of a source file.
*
* @param path The canonical path of source file.
* @param charset Source file encoding.
* @return Source file content.
*/
public String read(String path, String charset) {
String str = null;
byte[] bin = read(path);
try {
str = Charset.forName(charset).newDecoder().decode(ByteBuffer.wrap(bin)).toString();
} catch (CharacterCodingException e) {
App.exit("Cannot read " + path + " as " + charset + " encoded file");
}
return str;
}
/**
* Decode file charset.
*
* @param f File to process.
* @return File charset.
* @throws IOException in case of error.
*/
public static Charset decode(File f) throws IOException {
SortedMap<String, Charset> charsets = Charset.availableCharsets();
String[] firstCharsets = {
Charset.defaultCharset().name(), "US-ASCII", "UTF-8", "UTF-16BE", "UTF-16LE"
};
Collection<Charset> orderedCharsets = U.newLinkedHashSet(charsets.size());
for (String c : firstCharsets)
if (charsets.containsKey(c)) orderedCharsets.add(charsets.get(c));
orderedCharsets.addAll(charsets.values());
try (RandomAccessFile raf = new RandomAccessFile(f, "r")) {
FileChannel ch = raf.getChannel();
ByteBuffer buf = ByteBuffer.allocate(4096);
ch.read(buf);
buf.flip();
for (Charset charset : orderedCharsets) {
CharsetDecoder decoder = charset.newDecoder();
decoder.reset();
try {
decoder.decode(buf);
return charset;
} catch (CharacterCodingException ignored) {
}
}
}
return Charset.defaultCharset();
}
/**
* Tests response handling with specified charset in the header 'Content-Type'.
*
* @throws IOException I/O Exception
* @throws QueryException query exception
*/
@Test
public void responseWithCharset() throws IOException, QueryException {
// Create fake HTTP connection
final FakeHttpConnection conn = new FakeHttpConnection(new URL("http://www.test.com"));
// Set content type
conn.contentType = "text/plain; charset=CP1251";
// set content encoded in CP1251
final String test = "\u0442\u0435\u0441\u0442";
conn.content = Charset.forName("CP1251").encode(test).array();
final ItemList res = new HttpResponse(null, ctx.options).getResponse(conn, true, null);
// compare results
assertEquals(test, string(res.get(1).string(null)));
}
/**
* Check if the first X characters of a byte stream match a String.
*
* @param data The byte array to process
* @param pattern The String to match
* @return True if the pattern was found, false otherwise
*/
private static boolean bytesEqualsString(byte[] data, String pattern) {
byte[] bytes = new byte[pattern.length()];
Charset csets = Charset.forName("US-ASCII");
boolean fin = false;
int currChar = 0;
// remove any CR and/or LF characters at the beginning of the article
// data
while (!fin) {
if (currChar >= data.length) break;
byte in = data[currChar];
ByteBuffer bb = ByteBuffer.wrap(new byte[] {(byte) in});
CharBuffer cb = csets.decode(bb);
char c = cb.charAt(0);
if (data.length > 0 && (c == '\n' || c == '\r')) currChar++;
else fin = true;
if (data.length == 0) fin = true;
}
// extract bytes (chars) to check from article data
for (int i = 0; i < bytes.length && i < data.length; i++, currChar++) {
byte in = data[currChar];
bytes[i] = (byte) in;
}
// decode byte data to characters
ByteBuffer bb = ByteBuffer.wrap(bytes);
CharBuffer cb = csets.decode(bb);
// compare these characters to the pattern String
for (int i = 0; i < pattern.length(); i++) if (cb.charAt(i) != pattern.charAt(i)) return false;
return true;
}
private void parsestories() {
try {
List<String> lns =
Files.readAllLines(Paths.get("datasets/" + name + ".tsv"), Charset.defaultCharset());
for (String ln : lns) stories.add(Story.fromtext(ln));
} catch (IOException e) {
System.out.println("Error reading dataset.");
System.exit(1);
}
}
/**
* Adds the specified entry to the output stream.
*
* @param entry entry descriptor
* @param con contents
* @param out output archive
* @param level default compression level
* @throws QueryException query exception
* @throws IOException I/O exception
*/
private void add(final Item entry, final Item con, final ArchiveOut out, final int level)
throws QueryException, IOException {
// create new zip entry
final String name = string(entry.string(info));
if (name.isEmpty()) ARCH_EMPTY.thrw(info);
final ZipEntry ze = new ZipEntry(name);
String en = null;
// compression level
byte[] lvl = null;
if (entry instanceof ANode) {
final ANode el = (ANode) entry;
lvl = el.attribute(Q_LEVEL);
// last modified
final byte[] mod = el.attribute(Q_LAST_MOD);
if (mod != null) {
try {
ze.setTime(new Int(new Dtm(mod, info)).itr());
} catch (final QueryException qe) {
ARCH_DATETIME.thrw(info, mod);
}
}
// encoding
final byte[] enc = el.attribute(Q_ENCODING);
if (enc != null) {
en = string(enc);
if (!Charset.isSupported(en)) ARCH_ENCODING.thrw(info, enc);
}
}
// data to be compressed
byte[] val = checkStrBin(con);
if (con instanceof AStr && en != null && en != Token.UTF8) val = encode(val, en);
try {
out.level(lvl == null ? level : toInt(lvl));
} catch (final IllegalArgumentException ex) {
ARCH_LEVEL.thrw(info, lvl);
}
out.write(ze, val);
}
// initialize encodings
static {
final SortedMap<String, Charset> cs = Charset.availableCharsets();
ENCODINGS = cs.keySet().toArray(new String[cs.size()]);
}
/**
* Java client for BaseX. Works with BaseX 7.0 and later
*
* <p>Documentation: http://docs.basex.org/wiki/Clients
*
* <p>(C) BaseX Team 2005-12, BSD License
*/
public class BaseXClient {
/** UTF-8 charset. */
static final Charset UTF8 = Charset.forName("UTF-8");
/** Event notifications. */
final Map<String, EventNotifier> notifiers = new HashMap<String, EventNotifier>();
/** Output stream. */
final OutputStream out;
/** Socket. */
final Socket socket;
/** Cache. */
final BufferedInputStream in;
/** Command info. */
String info;
/** Socket event reference. */
Socket esocket;
/** Socket host name. */
String ehost;
/**
* Constructor.
*
* @param host server name
* @param port server port
* @param user user name
* @param pass password
* @throws IOException Exception
*/
public BaseXClient(final String host, final int port, final String user, final String pass)
throws IOException {
socket = new Socket();
socket.connect(new InetSocketAddress(host, port), 5000);
in = new BufferedInputStream(socket.getInputStream());
out = socket.getOutputStream();
ehost = host;
// receive timestamp
final String ts = receive();
// send {Username}0 and hashed {Password/Timestamp}0
send(user);
send(md5(md5(pass) + ts));
// receive success flag
if (!ok()) throw new IOException("Access denied.");
}
/**
* Executes a command and serializes the result to an output stream.
*
* @param cmd command
* @param o output stream
* @throws IOException Exception
*/
public void execute(final String cmd, final OutputStream o) throws IOException {
// send {Command}0
send(cmd);
receive(in, o);
info = receive();
if (!ok()) throw new IOException(info);
}
/**
* Executes a command and returns the result.
*
* @param cmd command
* @return result
* @throws IOException Exception
*/
public String execute(final String cmd) throws IOException {
final ByteArrayOutputStream os = new ByteArrayOutputStream();
execute(cmd, os);
return new String(os.toByteArray(), UTF8);
}
/**
* Creates a query object.
*
* @param query query string
* @return query
* @throws IOException Exception
*/
public Query query(final String query) throws IOException {
return new Query(query);
}
/**
* Creates a database.
*
* @param name name of database
* @param input xml input
* @throws IOException I/O exception
*/
public void create(final String name, final InputStream input) throws IOException {
send(8, name, input);
}
/**
* Adds a document to a database.
*
* @param path path to document
* @param input xml input
* @throws IOException I/O exception
*/
public void add(final String path, final InputStream input) throws IOException {
send(9, path, input);
}
/**
* Replaces a document in a database.
*
* @param path path to document
* @param input xml input
* @throws IOException I/O exception
*/
public void replace(final String path, final InputStream input) throws IOException {
send(12, path, input);
}
/**
* Stores a binary resource in a database.
*
* @param path path to document
* @param input xml input
* @throws IOException I/O exception
*/
public void store(final String path, final InputStream input) throws IOException {
send(13, path, input);
}
/**
* Watches an event.
*
* @param name event name
* @param notifier event notification
* @throws IOException I/O exception
*/
public void watch(final String name, final EventNotifier notifier) throws IOException {
out.write(10);
if (esocket == null) {
final int eport = Integer.parseInt(receive());
// initialize event socket
esocket = new Socket();
esocket.connect(new InetSocketAddress(ehost, eport), 5000);
final OutputStream os = esocket.getOutputStream();
receive(in, os);
os.write(0);
os.flush();
final InputStream is = esocket.getInputStream();
is.read();
listen(is);
}
send(name);
info = receive();
if (!ok()) throw new IOException(info);
notifiers.put(name, notifier);
}
/**
* Unwatches an event.
*
* @param name event name
* @throws IOException I/O exception
*/
public void unwatch(final String name) throws IOException {
out.write(11);
send(name);
info = receive();
if (!ok()) throw new IOException(info);
notifiers.remove(name);
}
/**
* Returns command information.
*
* @return string info
*/
public String info() {
return info;
}
/**
* Closes the session.
*
* @throws IOException Exception
*/
public void close() throws IOException {
send("exit");
out.flush();
if (esocket != null) esocket.close();
socket.close();
}
/**
* Checks the next success flag.
*
* @return value of check
* @throws IOException Exception
*/
boolean ok() throws IOException {
out.flush();
return in.read() == 0;
}
/**
* Returns the next received string.
*
* @return String result or info
* @throws IOException I/O exception
*/
String receive() throws IOException {
final ByteArrayOutputStream os = new ByteArrayOutputStream();
receive(in, os);
return new String(os.toByteArray(), UTF8);
}
/**
* Sends a string to the server.
*
* @param s string to be sent
* @throws IOException I/O exception
*/
void send(final String s) throws IOException {
out.write((s + '\0').getBytes(UTF8));
}
/**
* Receives a string and writes it to the specified output stream.
*
* @param is input stream
* @param os output stream
* @throws IOException I/O exception
*/
static void receive(final InputStream is, final OutputStream os) throws IOException {
for (int b; (b = is.read()) > 0; ) {
// read next byte if 0xFF is received
os.write(b == 0xFF ? is.read() : b);
}
}
/**
* Sends a command, argument, and input.
*
* @param cmd command
* @param path path to document
* @param input xml input
* @throws IOException I/O exception
*/
private void send(final int cmd, final String path, final InputStream input) throws IOException {
out.write(cmd);
send(path);
send(input);
}
/**
* Starts the listener thread.
*
* @param is input stream
*/
private void listen(final InputStream is) {
final BufferedInputStream bi = new BufferedInputStream(is);
new Thread() {
@Override
public void run() {
try {
while (true) {
ByteArrayOutputStream os = new ByteArrayOutputStream();
receive(bi, os);
final String name = new String(os.toByteArray(), UTF8);
os = new ByteArrayOutputStream();
receive(bi, os);
final String data = new String(os.toByteArray(), UTF8);
notifiers.get(name).notify(data);
}
} catch (final IOException ex) {
// loop will be quit if no data can be received anymore
}
}
}.start();
}
/**
* Sends an input stream to the server.
*
* @param input xml input
* @throws IOException I/O exception
*/
private void send(final InputStream input) throws IOException {
final BufferedInputStream bis = new BufferedInputStream(input);
final BufferedOutputStream bos = new BufferedOutputStream(out);
for (int b; (b = bis.read()) != -1; ) {
// 0x00 and 0xFF will be prefixed by 0xFF
if (b == 0x00 || b == 0xFF) bos.write(0xFF);
bos.write(b);
}
bos.write(0);
bos.flush();
info = receive();
if (!ok()) throw new IOException(info);
}
/**
* Returns an MD5 hash.
*
* @param pw String
* @return String
*/
private static String md5(final String pw) {
final StringBuilder sb = new StringBuilder();
try {
final MessageDigest md = MessageDigest.getInstance("MD5");
md.update(pw.getBytes());
for (final byte b : md.digest()) {
final String s = Integer.toHexString(b & 0xFF);
if (s.length() == 1) sb.append('0');
sb.append(s);
}
} catch (final NoSuchAlgorithmException ex) {
// should not occur
ex.printStackTrace();
}
return sb.toString();
}
/** Inner class for iterative query execution. */
public class Query {
/** Query id. */
private final String id;
/** Cached results. */
private ArrayList<byte[]> cache;
/** Cache pointer. */
private int pos;
/**
* Standard constructor.
*
* @param query query string
* @throws IOException I/O exception
*/
public Query(final String query) throws IOException {
id = exec(0, query);
}
/**
* Binds a value to an external variable.
*
* @param name name of variable
* @param value value
* @throws IOException I/O exception
*/
public void bind(final String name, final String value) throws IOException {
bind(name, value, "");
}
/**
* Binds a value with the specified type to an external variable.
*
* @param name name of variable
* @param value value
* @param type type (can be an empty string)
* @throws IOException I/O exception
*/
public void bind(final String name, final String value, final String type) throws IOException {
cache = null;
exec(3, id + '\0' + name + '\0' + value + '\0' + type);
}
/**
* Binds a value to the context item.
*
* @param value value
* @throws IOException I/O exception
*/
public void context(final String value) throws IOException {
context(value, "");
}
/**
* Binds a value with the specified type to the context item.
*
* @param value value
* @param type type (can be an empty string)
* @throws IOException I/O exception
*/
public void context(final String value, final String type) throws IOException {
cache = null;
exec(14, id + '\0' + value + '\0' + type);
}
/**
* Checks for the next item.
*
* @return result of check
* @throws IOException I/O exception
*/
public boolean more() throws IOException {
if (cache == null) {
out.write(4);
send(id);
cache = new ArrayList<byte[]>();
final ByteArrayOutputStream os = new ByteArrayOutputStream();
while (in.read() > 0) {
receive(in, os);
cache.add(os.toByteArray());
os.reset();
}
if (!ok()) throw new IOException(receive());
pos = 0;
}
if (pos < cache.size()) return true;
cache = null;
return false;
}
/**
* Returns the next item.
*
* @return item string
* @throws IOException I/O Exception
*/
public String next() throws IOException {
return more() ? new String(cache.set(pos++, null), UTF8) : null;
}
/**
* Returns the whole result of the query.
*
* @return query result
* @throws IOException I/O Exception
*/
public String execute() throws IOException {
return exec(5, id);
}
/**
* Returns query info in a string.
*
* @return query info
* @throws IOException I/O exception
*/
public String info() throws IOException {
return exec(6, id);
}
/**
* Returns serialization parameters in a string.
*
* @return query info
* @throws IOException I/O exception
*/
public String options() throws IOException {
return exec(7, id);
}
/**
* Closes the query.
*
* @throws IOException I/O exception
*/
public void close() throws IOException {
exec(2, id);
}
/**
* Executes the specified command.
*
* @param cmd command
* @param arg argument
* @return resulting string
* @throws IOException I/O exception
*/
private String exec(final int cmd, final String arg) throws IOException {
out.write(cmd);
send(arg);
final String s = receive();
if (!ok()) throw new IOException(receive());
return s;
}
}
/** Interface for event notifications. */
public interface EventNotifier {
/**
* Invoked when a database event was fired.
*
* @param value event string
*/
void notify(final String value);
}
}
public class AdParser {
int level = 0;
char saved = 0;
private Reader r;
boolean body_only = false;
private static RuntimeException eof = new RuntimeException("end of stream reached");
public static Charset defaultCharset = Charset.forName("UTF-8");
public static final String SEP = ",;& \n\r";
public static final String EQ = ":=";
public static final String OB = "{[(<"; // It's a fish!
public static final String CB = "}])>";
public static final String WS = " \t\n\r\b";
// This includes decorator hints for printing. Or will, maybe. For now
// it just picks a printer based on the opening bracket. The hint should
// be set after at least one object is inserted so we know whether this
// ad is a map or list.
public static class ParsedAd extends Ad {
public AdPrinter printer = AdPrinter.CLASSAD;
public AdPrinter setHint(char c) {
if (isList())
switch (c) {
case '[':
return printer = AdPrinter.JSON;
case '{':
return printer = AdPrinter.CLASSAD;
}
else
switch (c) {
case '{':
return printer = AdPrinter.JSON;
case '[':
return printer = AdPrinter.CLASSAD;
}
return printer;
}
public String toString() {
return printer.toString(this);
}
}
AdParser(CharSequence s, boolean body_only) {
this(new StringReader(s.toString()), body_only);
}
AdParser(InputStream is, boolean body_only) {
this(new InputStreamReader(is, defaultCharset), body_only);
}
AdParser(Reader r, boolean body_only) {
this.r = (r instanceof BufferedReader) ? r : new BufferedReader(r);
if (this.body_only = body_only) saved = '[';
}
// Utility methods
// ---------------
// Get the next character, throwing an unchecked exception on error.
private char next() {
try {
int i = (saved != 0) ? saved : r.read();
saved = 0;
if (i <= -1) {
if (body_only) return ']'; // Just a little hacky.
throw eof;
}
return (char) i;
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
// Peek at the next character, then save it.
private char peek() {
char c = next();
return saved = c;
}
// Check if a string or range contains a character.
private static boolean check(char c, String s) {
return s.indexOf(c) >= 0;
}
private static boolean check(char c, char from, char to) {
if (from > to) return check(c, to, from);
return c >= from && c <= to;
}
// Discard characters from the given set. Return the first thing that
// isn't part of the ignore set.
private char discard() {
// Discard whitespace by default.
return discard(WS);
}
private char discard(String s) {
char c;
for (c = next(); check(c, s); c = next()) ;
return c;
}
// Discard ignored characters as well as comments.
private char discardIgnored() {
return discardIgnored(WS);
}
private char discardIgnored(String s) {
char c;
do
switch (c = discard(s)) {
case '/':
if (peek() != '/') return c;
case '#':
for (c = peek(); !check(c, "\r\n"); c = next()) ;
}
while (check(c, s));
return c;
}
// Ignore all whitespace and check for a character in the given set.
// If something else is found, throws a parse error.
private char expect(String s) {
return expect(s, WS);
}
private char expect(String s, String i) {
char c = discardIgnored(i);
if (!check(c, s)) throw new RuntimeException("unexpected character: " + c);
return c;
}
// Lowercase a character assuming it's an A-Z letter.
private static char low(char c) {
return (char) ((short) c | (short) ' ');
}
// Parsing methods
// ---------------
public Ad parse() {
try {
return parseInto(new ParsedAd());
} catch (RuntimeException e) {
if (e == eof) return null;
throw e;
}
}
public Ad parseInto(Ad ad) {
char open = expect(OB);
for (int i = 0; ; i++) {
char c = saved = discardIgnored(SEP + WS);
// Check for end of ad.
if (check(c, CB)) {
next();
return ad;
}
// Discard any extraneous separators or newlines.
saved = discardIgnored(SEP + WS);
// Read the first token.
Object o = readValue();
// Check if it's anonymous or not.
// FIXME: These switch cases should not be hardcoded...
switch (c = expect(EQ + SEP + CB, " \t\b")) {
case ':': // Check for assignment.
case '=':
// Determine the key.
String k = o.toString();
o = findValue();
// Insert into ad as key-value pair.
if (o instanceof Atom) ad.putObject(k, ((Atom) o).eval());
else ad.putObject(k, o);
if (open > 0 && ad instanceof ParsedAd) ((ParsedAd) ad).setHint(open);
open = 0;
break;
case '}': // Check for end and push char back if found.
case ']':
case ')':
case '>':
saved = c;
case ',': // Check for separator.
case ';':
case '&':
case ' ':
case '\r':
case '\n':
// Insert into ad as list item.
if (o instanceof Atom) ad.putObject(((Atom) o).eval());
else ad.putObject(o);
if (open > 0 && ad instanceof ParsedAd) ((ParsedAd) ad).setHint(open);
open = 0;
}
}
}
// Find and unescape a string.
private String readString() {
StringBuilder sb = new StringBuilder();
char c = next();
if (c != '"') throw new RuntimeException("expecting start of string");
while (true)
switch (c = next()) {
case '"':
return sb.toString();
case '\\':
sb.append(readEscaped());
continue;
default:
if (Character.isISOControl(c)) throw new RuntimeException("illegal character in string");
sb.append(c);
}
}
// Find an escaped character, assuming the \ has already been read.
private char readEscaped() {
switch (next()) {
case '"':
return '"';
case '\\':
return '\\';
case '/':
return '/';
case 'b':
return '\b';
case 'f':
return '\f';
case 'n':
return '\n';
case 'r':
return '\r';
case 't':
return '\t';
case 'u':
{
int r = 0;
for (int i = 0; i < 4; i++) {
char c = next();
if (check(c, '0', '9')) r = (r << 4) | (c - '0');
else if (check(c = low(c), 'a', 'f')) r = (r << 4) | (c - 'a' + 10);
else throw new RuntimeException("illegal escape sequence");
}
return (char) r;
}
}
throw new RuntimeException("illegal escape sequence");
}
// An atom represents something that can be either an identifier or a
// keyword. The string representation of this should be lowercased for
// use as a key.
private static class Atom {
String s;
Atom(String s) {
this.s = s;
}
public String toString() {
return s.toLowerCase();
}
public Object eval() {
String sl = s.toLowerCase();
if (sl.equals("false")) return Boolean.FALSE;
if (sl.equals("true")) return Boolean.TRUE;
if (sl.equals("null")) return null;
return s;
}
}
// Try to read an atom.
private Atom readAtom() {
StringBuilder sb = new StringBuilder();
for (char c = peek(); validAtomPart(c); c = peek()) sb.append(next());
return new Atom(sb.toString());
}
// Check if a character can start or be in an atom.
private static boolean validAtomStart(char c) {
return check(low(c), 'a', 'z') || c == '_';
}
private static boolean validAtomPart(char c) {
return check(low(c), 'a', 'z') || c == '_' || check(c, '0', '9');
}
// Check if a string is a valid identifier.
public static boolean checkIdentifier(String s) {
for (char i = 0; i < s.length(); i++) {
char c = s.charAt(i);
if (i == 0 && !validAtomStart(c) || !validAtomPart(c)) return false;
}
return true;
}
// Find a value, and return it as a Java object.
private Object findValue() {
saved = discardIgnored();
return readValue();
}
private Object readValue() {
char c = peek();
switch (c) {
case '"':
return readString();
case '-':
return readNumber();
}
if (check(c, '0', '9')) {
return readNumber();
}
if (check(c, "{[(<")) {
return parseInto(new Ad());
}
if (validAtomStart(c)) {
return readAtom();
}
throw new RuntimeException("cannot parse value starting with: " + c);
}
private Number readNumber() {
char c;
boolean d = false;
StringBuilder sb = new StringBuilder();
while (true)
switch (c = peek()) {
case '.':
case 'e':
case 'E':
case '+':
d = true;
case '-':
sb.append(next());
continue;
default:
if (check(c, '0', '9')) sb.append(next());
else if (check(c, ",:; \n\r\t>}])")) {
return d ? new BigDecimal(sb.toString()) : new BigInteger(sb.toString());
} else throw new RuntimeException("unexpected character: " + c);
}
}
}
ByteToCharConverter(Charset charset, String encoding) {
super(encoding);
decoder = charset.newDecoder().onUnmappableCharacter(CodingErrorAction.REPLACE);
// for compatibility to old ByteToCharASCII converter:
if (charset.name().equals("US-ASCII")) decoder.onMalformedInput(CodingErrorAction.REPLACE);
}
/**
* Returns the connection charset. Defaults to {@link Charset} defaultCharset if not set
*
* @return charset
*/
public String getCharset()
{
return charset == null ? Charset.defaultCharset().name() : charset;
}
// 感觉如果没有看过 NIO 的详细内容是不会懂这部分
public class TypeServer extends TCPNIOServer {
static String testString = "Thisisateststring";
static class ClientInfo {
ByteBuffer inBuf = ByteBuffer.allocateDirect(512);
ByteBuffer outBuf = ByteBuffer.allocateDirect(512);
boolean outputPending = false;
SocketChannel channel;
}
Map allClients = new HashMap();
Charset encoder = Charset.forName("UTF-8");
protected void handleClient(SelectionKey key) throws IOException {
SocketChannel sc = (SocketChannel) key.channel();
ClientInfo ci = (ClientInfo) allClients.get(sc);
if (ci == null) throw new IllegalStateException("Unknown client");
if (key.isWritable()) send(sc, ci);
if (key.isReadable())
// 从一个客户端读进所有的可用数据
recv(sc, ci);
}
private void recv(SocketChannel sc, ClientInfo ci) throws IOException {
ci.channel.read(ci.inBuf);
ByteBuffer tmpBuf = ci.inBuf.duplicate();
tmpBuf.flip();
int bytesProcessed = 0;
boolean doneLoop = false;
while (!doneLoop) {
byte b;
try {
b = tmpBuf.get();
} catch (BufferUnderflowException bue) {
// Processed all data in buffer
ci.inBuf.clear();
doneLoop = true;
break;
}
switch (b) {
case TypeServerConstants.WELCOME:
bytesProcessed++;
break;
case TypeServerConstants.GET_STRING_REQUEST:
bytesProcessed++;
if (ci.outputPending) {
// Client is backed up. We can't append to
// the byte buffer because it's in the wrong
// state. We could allocate another buffer
// here and change our send method to know
// about multiple buffers, but we'll just
// assume that the client is dead
break;
}
ci.outBuf.put(TypeServerConstants.GET_STRING_RESPONSE);
ByteBuffer strBuf = encoder.encode(testString);
ci.outBuf.putShort((short) strBuf.remaining());
ci.outBuf.put(strBuf);
ci.outBuf.flip();
send(sc, ci);
break;
case TypeServerConstants.GET_STRING_RESPONSE:
int startPos = tmpBuf.position();
try {
int nBytes = tmpBuf.getInt();
byte[] buf = new byte[nBytes];
tmpBuf.get(buf);
bytesProcessed += buf.length + 5;
String s = new String(buf);
// Send the string to the GUI
break;
} catch (BufferUnderflowException bue) {
// Processed all available data
ci.inBuf.position(ci.inBuf.position() + bytesProcessed);
doneLoop = true;
}
break;
}
}
}
private void send(SocketChannel sc, ClientInfo ci) throws IOException {
int len = ci.outBuf.remaining();
int nBytes = sc.write(ci.outBuf);
if (nBytes != len) {
// Client not ready to receive data
ci.outputPending = true;
ci.channel.register(selector, SelectionKey.OP_READ | SelectionKey.OP_WRITE);
} else {
ci.outBuf.clear();
if (ci.outputPending) {
ci.outputPending = false;
ci.channel.register(selector, SelectionKey.OP_READ);
}
}
}
protected void registeredClient(SocketChannel sc) throws IOException {
ClientInfo ci = new ClientInfo();
ci.channel = sc;
ci.outBuf.clear();
ci.outBuf.put(TypeServerConstants.WELCOME);
ci.outBuf.flip();
allClients.put(sc, ci);
send(sc, ci);
}
public static void main(String[] args) throws Exception {
TypeServer ts = new TypeServer();
ts.port = Integer.parseInt(args[0]);
Thread t = new Thread(ts);
t.start();
System.out.println("Type server ready...Type CTRL-D to exit");
while (System.in.read() > 0) ;
ts.stopServer();
t.join();
}
}
