81bc077a39
* gnu/java/nio/PipeImpl.java (SourceChannelImpl): New inner class. (SinkChannelImpl): New inner class. (sink): New member variable. (source): New member variable. (PipeImpl): Add SelectorProvider argument, implemented. (nativeInit): New method. (sink): Return sink channel. (source): Return source channel. * gnu/java/nio/SelectorProviderImpl.java (openPipe): Give provider as argument to PipeImpl constructor. * java/nio/channels/spi/SelectorProvider.java (pr): Removed. (systemDefaultProvider): New member variable. (provider): Made it synchronized, use property java.nio.channels.spi.SelectorProvider. * gnu/java/nio/natPipeImpl.cc: New file. * Makefile.am (nat_source_files): Added gnu/java/nio/natPipeImpl.cc. * Makefile.in: Regenerated. From-SVN: r72397
126 lines
4 KiB
Java
126 lines
4 KiB
Java
/* SelectorProvider.java
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Copyright (C) 2002, 2003 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.nio.channels.spi;
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import gnu.java.nio.SelectorProviderImpl;
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import java.io.IOException;
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import java.nio.channels.DatagramChannel;
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import java.nio.channels.Pipe;
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import java.nio.channels.ServerSocketChannel;
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import java.nio.channels.SocketChannel;
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/**
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* @author Michael Koch
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* @since 1.4
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*/
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public abstract class SelectorProvider
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{
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private static SelectorProvider systemDefaultProvider;
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/**
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* Initializes the selector provider.
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*
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* @exception SecurityException If a security manager has been installed and
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* it denies @see RuntimePermission ("selectorProvider").
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*/
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protected SelectorProvider ()
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{
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SecurityManager sm = System.getSecurityManager ();
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if (sm != null)
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sm.checkPermission (new RuntimePermission ("selectorProvider"));
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}
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/**
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* Opens a datagram channel.
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*/
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public abstract DatagramChannel openDatagramChannel () throws IOException;
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/**
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* Opens a pipe.
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*/
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public abstract Pipe openPipe () throws IOException;
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/**
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* Opens a selector.
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*/
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public abstract AbstractSelector openSelector () throws IOException;
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/**
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* Opens a server socket channel.
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*/
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public abstract ServerSocketChannel openServerSocketChannel ()
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throws IOException;
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/**
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* Opens a socket channel.
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*/
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public abstract SocketChannel openSocketChannel () throws IOException;
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/**
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* Returns the system-wide default selector provider for this invocation
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* of the Java virtual machine.
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*/
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public static synchronized SelectorProvider provider ()
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{
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if (systemDefaultProvider == null)
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{
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String propertyValue =
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System.getProperty ("java.nio.channels.spi.SelectorProvider");
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if (propertyValue == null
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|| propertyValue.equals (""))
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systemDefaultProvider = new SelectorProviderImpl();
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else
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{
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try
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{
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systemDefaultProvider = (SelectorProvider) Class.forName
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(propertyValue).newInstance();
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}
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catch (Exception e)
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{
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System.err.println ("Could not instantiate class: "
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+ propertyValue);
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systemDefaultProvider = new SelectorProviderImpl();
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}
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}
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}
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return systemDefaultProvider;
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}
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}
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