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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » java.net

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

java.net .SocketImpl

All known Subclasses:   java.net .PlainSocketImpl,
SocketImpl
abstract public class SocketImpl implements SocketOptions(Code)
The abstract class SocketImpl is a common superclass of all classes that actually implement sockets. It is used to create both client and server sockets.
A "plain" socket implements these methods exactly as described, without attempting to go through a firewall or proxy.
author:
   unascribed
version:
   1.31 10/17/00
since:
   JDK1.0

Field Summary
protected InetAddress address
     The IP address of the remote end of this socket.
protected FileDescriptor fd
     The file descriptor object for this socket.
protected int localport
     The local port number to which this socket is connected.
protected int port
     The port number on the remote host to which this socket is connected.
ServerSocket serverSocket

Socket socket
     The actual Socket object.

Method Summary
abstract protected void accept(SocketImpl s)
     Accepts a connection.
abstract protected int available()
     Returns the number of bytes that can be read from this socket without blocking.
abstract protected void bind(InetAddress host, int port)
     Binds this socket to the specified port number on the specified host.
abstract protected void close()
     Closes this socket.
abstract protected void connect(String host, int port)
     Connects this socket to the specified port on the named host.
abstract protected void connect(InetAddress address, int port)
     Connects this socket to the specified port number on the specified host.
abstract protected void connect(SocketAddress address, int timeout)
     Connects this socket to the specified port number on the specified host. A timeout of zero is interpreted as an infinite timeout.
abstract protected void create(boolean stream)
     Creates either a stream or a datagram socket.
protected FileDescriptor getFileDescriptor()
     Returns the value of this socket's fd field.
protected InetAddress getInetAddress()
     Returns the value of this socket's address field.
abstract protected InputStream getInputStream()
     Returns an input stream for this socket.
protected int getLocalPort()
     Returns the value of this socket's localport field.
abstract protected OutputStream getOutputStream()
     Returns an output stream for this socket.
protected int getPort()
     Returns the value of this socket's port field.
ServerSocket getServerSocket()

Socket getSocket()

abstract protected void listen(int backlog)
     Sets the maximum queue length for incoming connection indications (a request to connect) to the count argument.
void reset()

abstract protected void sendUrgentData(int data)
     Send one byte of urgent data on the socket.
void setServerSocket(ServerSocket soc)

void setSocket(Socket soc)

protected void shutdownInput()
     Places the input stream for this socket at "end of stream".
protected void shutdownOutput()
     Disables the output stream for this socket.
protected boolean supportsUrgentData()
     Returns whether or not this SocketImpl supports sending urgent data.
public String toString()
     Returns the address and port of this socket as a String.

Field Detail
address
protected InetAddress address(Code)
The IP address of the remote end of this socket.

fd
protected FileDescriptor fd(Code)
The file descriptor object for this socket.

localport
protected int localport(Code)
The local port number to which this socket is connected.

port
protected int port(Code)
The port number on the remote host to which this socket is connected.

serverSocket
ServerSocket serverSocket(Code)

socket
Socket socket(Code)
The actual Socket object.

Method Detail
accept
abstract protected void accept(SocketImpl s) throws IOException(Code)
Accepts a connection.
Parameters:
  s - the accepted connection.
exception:
  IOException - if an I/O error occurs when accepting theconnection.

available
abstract protected int available() throws IOException(Code)
Returns the number of bytes that can be read from this socket without blocking. the number of bytes that can be read from this socketwithout blocking.
exception:
  IOException - if an I/O error occurs when determining thenumber of bytes available.

bind
abstract protected void bind(InetAddress host, int port) throws IOException(Code)
Binds this socket to the specified port number on the specified host.
Parameters:
  host - the IP address of the remote host.
Parameters:
  port - the port number.
exception:
  IOException - if an I/O error occurs when binding this socket.

close
abstract protected void close() throws IOException(Code)
Closes this socket.
exception:
  IOException - if an I/O error occurs when closing this socket.

connect
abstract protected void connect(String host, int port) throws IOException(Code)
Connects this socket to the specified port on the named host.
Parameters:
  host - the name of the remote host.
Parameters:
  port - the port number.
exception:
  IOException - if an I/O error occurs when connecting to theremote host.

connect
abstract protected void connect(InetAddress address, int port) throws IOException(Code)
Connects this socket to the specified port number on the specified host.
Parameters:
  address - the IP address of the remote host.
Parameters:
  port - the port number.
exception:
  IOException - if an I/O error occurs when attempting aconnection.

connect
abstract protected void connect(SocketAddress address, int timeout) throws IOException(Code)
Connects this socket to the specified port number on the specified host. A timeout of zero is interpreted as an infinite timeout. The connection will then block until established or an error occurs.
Parameters:
  address - the Socket address of the remote host.
Parameters:
  timeout - the timeout value, in milliseconds, or zero for no timeout.
exception:
  IOException - if an I/O error occurs when attempting aconnection.
since:
   1.4

create
abstract protected void create(boolean stream) throws IOException(Code)
Creates either a stream or a datagram socket.
Parameters:
  stream - if true, create a stream socket;otherwise, create a datagram socket.
exception:
  IOException - if an I/O error occurs while creating thesocket.

getFileDescriptor
protected FileDescriptor getFileDescriptor()(Code)
Returns the value of this socket's fd field. the value of this socket's fd field.
See Also:   java.net.SocketImpl.fd

getInetAddress
protected InetAddress getInetAddress()(Code)
Returns the value of this socket's address field. the value of this socket's address field.
See Also:   java.net.SocketImpl.address

getInputStream
abstract protected InputStream getInputStream() throws IOException(Code)
Returns an input stream for this socket. a stream for reading from this socket.
exception:
  IOException - if an I/O error occurs when creating theinput stream.

getLocalPort
protected int getLocalPort()(Code)
Returns the value of this socket's localport field. the value of this socket's localport field.
See Also:   java.net.SocketImpl.localport

getOutputStream
abstract protected OutputStream getOutputStream() throws IOException(Code)
Returns an output stream for this socket. an output stream for writing to this socket.
exception:
  IOException - if an I/O error occurs when creating theoutput stream.

getPort
protected int getPort()(Code)
Returns the value of this socket's port field. the value of this socket's port field.
See Also:   java.net.SocketImpl.port

getServerSocket
ServerSocket getServerSocket()(Code)

getSocket
Socket getSocket()(Code)

listen
abstract protected void listen(int backlog) throws IOException(Code)
Sets the maximum queue length for incoming connection indications (a request to connect) to the count argument. If a connection indication arrives when the queue is full, the connection is refused.
Parameters:
  backlog - the maximum length of the queue.
exception:
  IOException - if an I/O error occurs when creating the queue.

reset
void reset() throws IOException(Code)

sendUrgentData
abstract protected void sendUrgentData(int data) throws IOException(Code)
Send one byte of urgent data on the socket. The byte to be sent is the low eight bits of the parameter
Parameters:
  data - The byte of data to send
exception:
  IOException - if there is an errorsending the data.
since:
   1.4

setServerSocket
void setServerSocket(ServerSocket soc)(Code)

setSocket
void setSocket(Socket soc)(Code)

shutdownInput
protected void shutdownInput() throws IOException(Code)
Places the input stream for this socket at "end of stream". Any data sent to this socket is acknowledged and then silently discarded. If you read from a socket input stream after invoking shutdownInput() on the socket, the stream will return EOF.
exception:
  IOException - if an I/O error occurs when shutting down thissocket.
See Also:   java.net.Socket.shutdownOutput
See Also:   java.net.Socket.close
See Also:   java.net.Socket.setSoLinger(booleanint)

shutdownOutput
protected void shutdownOutput() throws IOException(Code)
Disables the output stream for this socket. For a TCP socket, any previously written data will be sent followed by TCP's normal connection termination sequence. If you write to a socket output stream after invoking shutdownOutput() on the socket, the stream will throw an IOException.
exception:
  IOException - if an I/O error occurs when shutting down thissocket.
See Also:   java.net.Socket.shutdownInput
See Also:   java.net.Socket.close
See Also:   java.net.Socket.setSoLinger(booleanint)

supportsUrgentData
protected boolean supportsUrgentData()(Code)
Returns whether or not this SocketImpl supports sending urgent data. By default, false is returned unless the method is overridden in a sub-class true if urgent data supported
See Also:   java.net.SocketImpl.address
since:
   1.4

toString
public String toString()(Code)
Returns the address and port of this socket as a String. a string representation of this socket.

Methods inherited from java.lang.Object
public boolean equals(Object obj)(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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