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gnu.java.nio

Class DatagramChannelImpl

Implemented Interfaces:
AutoCloseable, ByteChannel, Channel, Closeable, GatheringByteChannel, InterruptibleChannel, ReadableByteChannel, ScatteringByteChannel, WritableByteChannel
public final class DatagramChannelImpl
extends DatagramChannel

Constructor Summary

DatagramChannelImpl(SelectorProvider provider)
Initializes the channel.

Method Summary

DatagramChannel
connect(SocketAddress remote)
Connects this channel's socket.
DatagramChannel
disconnect()
Disonnects this channel's socket.
int
getNativeFD()
protected void
implCloseSelectableChannel()
Closes this selectable channel.
protected void
implConfigureBlocking(boolean blocking)
Adjusts this channel's blocking mode.
boolean
isConnected()
Tells whether or not this channel's socket is connected.
boolean
isInChannelOperation()
Indicates whether our datagram socket should ignore whether we are set to non-blocking mode.
int
read(ByteBuffer dst)
Reads data from this channel.
long
read(ByteBuffer[] dsts, int offset, int length)
Reads data from this channel.
SocketAddress
receive(ByteBuffer dst)
Receives a datagram via this channel.
int
send(ByteBuffer src, SocketAddress target)
Sends a datagram via this channel.
void
setInChannelOperation(boolean b)
Sets our indicator of whether we are initiating an I/O operation on our socket.
DatagramSocket
socket()
Retrieves the channel's socket.
int
write(ByteBuffer src)
Writes data to this channel.
long
write(ByteBuffer[] srcs, int offset, int length)
Writes data to this channel.

Methods inherited from class java.nio.channels.DatagramChannel

connect, disconnect, isConnected, open, read, read, read, receive, send, socket, validOps, write, write, write

Methods inherited from class java.nio.channels.spi.AbstractSelectableChannel

blockingLock, configureBlocking, implCloseChannel, implCloseSelectableChannel, implConfigureBlocking, isBlocking, isRegistered, keyFor, provider, register

Methods inherited from class java.nio.channels.SelectableChannel

blockingLock, configureBlocking, isBlocking, isRegistered, keyFor, provider, register, register, validOps

Methods inherited from class java.nio.channels.spi.AbstractInterruptibleChannel

begin, close, end, implCloseChannel, isOpen

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DatagramChannelImpl

protected DatagramChannelImpl(SelectorProvider provider)
            throws IOException
Initializes the channel.

Method Details

connect

public DatagramChannel connect(SocketAddress remote)
            throws IOException
Connects this channel's socket.
Overrides:
connect in interface DatagramChannel
Throws:
IOException - If an error occurs.
SecurityException - If a security manager has been installed and it does not permit datagrams to be sent to the given address.

disconnect

public DatagramChannel disconnect()
            throws IOException
Disonnects this channel's socket.
Overrides:
disconnect in interface DatagramChannel
Throws:
IOException - If an error occurs

getNativeFD

public int getNativeFD()

implCloseSelectableChannel

protected void implCloseSelectableChannel()
            throws IOException
Closes this selectable channel.
Overrides:
implCloseSelectableChannel in interface AbstractSelectableChannel
Throws:
IOException - If an error occurs

implConfigureBlocking

protected void implConfigureBlocking(boolean blocking)
            throws IOException
Adjusts this channel's blocking mode.
Overrides:
implConfigureBlocking in interface AbstractSelectableChannel
Parameters:
blocking - true if blocking should be enabled, false otherwise
Throws:
IOException - If an error occurs

isConnected

public boolean isConnected()
Tells whether or not this channel's socket is connected.
Overrides:
isConnected in interface DatagramChannel
Throws:
NotYetConnectedException - The channel's socket is not connected.

isInChannelOperation

public final boolean isInChannelOperation()
Indicates whether our datagram socket should ignore whether we are set to non-blocking mode. Certain operations on our socket throw an IllegalBlockingModeException if we are in non-blocking mode, except if the operation is initiated by us.

read

public int read(ByteBuffer dst)
            throws IOException
Reads data from this channel.
Specified by:
read in interface ReadableByteChannel
Overrides:
read in interface DatagramChannel

read

public long read(ByteBuffer[] dsts,
                 int offset,
                 int length)
            throws IOException
Reads data from this channel.
Specified by:
read in interface ScatteringByteChannel
Overrides:
read in interface DatagramChannel
Throws:
IOException - If an error occurs.
NotYetConnectedException - The channel's socket is not connected.

receive

public SocketAddress receive(ByteBuffer dst)
            throws IOException
Receives a datagram via this channel.
Overrides:
receive in interface DatagramChannel
Throws:
IOException - If an error occurs
SecurityException - If a security manager has been installed and it does not permit datagrams to be sent to the given address.

send

public int send(ByteBuffer src,
                SocketAddress target)
            throws IOException
Sends a datagram via this channel.
Overrides:
send in interface DatagramChannel
Throws:
IOException - If an error occurs
SecurityException - If a security manager has been installed and it does not permit datagrams to be sent to the given address.

setInChannelOperation

public final void setInChannelOperation(boolean b)
Sets our indicator of whether we are initiating an I/O operation on our socket.

socket

public DatagramSocket socket()
Retrieves the channel's socket.
Overrides:
socket in interface DatagramChannel

write

public int write(ByteBuffer src)
            throws IOException
Writes data to this channel.
Specified by:
write in interface WritableByteChannel
Overrides:
write in interface DatagramChannel
Throws:
IOException - If an error occurs.
NotYetConnectedException - The channel's socket is not connected.

write

public long write(ByteBuffer[] srcs,
                  int offset,
                  int length)
            throws IOException
Writes data to this channel.
Specified by:
write in interface GatheringByteChannel
Overrides:
write in interface DatagramChannel
Throws:
IOException - If an error occurs.
NotYetConnectedException - The channel's socket is not connected.
DatagramChannelImpl.java -- Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath 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 for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.

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