1/*
2 * Copyright (c) 2002, 2006, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26/*
27 */
28
29package sun.nio.ch;
30
31import java.io.IOException;
32import java.io.FileDescriptor;
33import java.nio.ByteBuffer;
34import java.nio.channels.*;
35import java.nio.channels.spi.*;
36
37/**
38 * Pipe.SourceChannel implementation based on socket connection.
39 */
40
41class SourceChannelImpl
42    extends Pipe.SourceChannel
43    implements SelChImpl
44{
45    // The SocketChannel assoicated with this pipe
46    SocketChannel sc;
47
48    public FileDescriptor getFD() {
49        return ((SocketChannelImpl) sc).getFD();
50    }
51
52    public int getFDVal() {
53        return ((SocketChannelImpl) sc).getFDVal();
54    }
55
56    SourceChannelImpl(SelectorProvider sp, SocketChannel sc) {
57        super(sp);
58        this.sc = sc;
59    }
60
61    protected void implCloseSelectableChannel() throws IOException {
62        if (!isRegistered())
63            kill();
64    }
65
66    public void kill() throws IOException {
67        sc.close();
68    }
69
70    protected void implConfigureBlocking(boolean block) throws IOException {
71        sc.configureBlocking(block);
72    }
73
74    public boolean translateReadyOps(int ops, int initialOps,
75                                     SelectionKeyImpl sk) {
76        int intOps = sk.nioInterestOps(); // Do this just once, it synchronizes
77        int oldOps = sk.nioReadyOps();
78        int newOps = initialOps;
79
80        if ((ops & Net.POLLNVAL) != 0)
81            throw new Error("POLLNVAL detected");
82
83        if ((ops & (Net.POLLERR | Net.POLLHUP)) != 0) {
84            newOps = intOps;
85            sk.nioReadyOps(newOps);
86            return (newOps & ~oldOps) != 0;
87        }
88
89        if (((ops & Net.POLLIN) != 0) &&
90            ((intOps & SelectionKey.OP_READ) != 0))
91            newOps |= SelectionKey.OP_READ;
92
93        sk.nioReadyOps(newOps);
94        return (newOps & ~oldOps) != 0;
95    }
96
97    public boolean translateAndUpdateReadyOps(int ops, SelectionKeyImpl sk) {
98        return translateReadyOps(ops, sk.nioReadyOps(), sk);
99    }
100
101    public boolean translateAndSetReadyOps(int ops, SelectionKeyImpl sk) {
102        return translateReadyOps(ops, 0, sk);
103    }
104
105    public void translateAndSetInterestOps(int ops, SelectionKeyImpl sk) {
106        if ((ops & SelectionKey.OP_READ) != 0)
107            ops = Net.POLLIN;
108        sk.selector.putEventOps(sk, ops);
109    }
110
111    public int read(ByteBuffer dst) throws IOException {
112        try {
113            return sc.read(dst);
114        } catch (AsynchronousCloseException x) {
115            close();
116            throw x;
117        }
118    }
119
120    public long read(ByteBuffer[] dsts, int offset, int length)
121        throws IOException
122    {
123        if ((offset < 0) || (length < 0) || (offset > dsts.length - length))
124           throw new IndexOutOfBoundsException();
125        try {
126            return read(Util.subsequence(dsts, offset, length));
127        } catch (AsynchronousCloseException x) {
128            close();
129            throw x;
130        }
131    }
132
133    public long read(ByteBuffer[] dsts) throws IOException {
134        try {
135            return sc.read(dsts);
136        } catch (AsynchronousCloseException x) {
137            close();
138            throw x;
139        }
140    }
141
142}
143