Examples with NonWritableChannelException java.nio.channels.NonWritableChannelException used on opensource projects

Example 16 with NonWritableChannelException

use of java.nio.channels.NonWritableChannelException in project robovm by robovm.

the class FileChannelTest method test_writeLByteBufferJ_ReadOnly.

public void test_writeLByteBufferJ_ReadOnly() throws Exception {
    ByteBuffer writeBuffer = ByteBuffer.allocate(CAPACITY);
    try {
        readOnlyFileChannel.write(writeBuffer, 10);
        fail();
    } catch (NonWritableChannelException expected) {
    }
}

Example 17 with NonWritableChannelException

use of java.nio.channels.NonWritableChannelException in project robovm by robovm.

the class FileChannelImpl method basicLock.

private FileLock basicLock(long position, long size, boolean shared, boolean wait) throws IOException {
    int accessMode = (mode & O_ACCMODE);
    if (accessMode == O_RDONLY) {
        if (!shared) {
            throw new NonWritableChannelException();
        }
    } else if (accessMode == O_WRONLY) {
        if (shared) {
            throw new NonReadableChannelException();
        }
    }
    if (position < 0 || size < 0) {
        throw new IllegalArgumentException("position=" + position + " size=" + size);
    }
    FileLock pendingLock = new FileLockImpl(this, position, size, shared);
    addLock(pendingLock);
    StructFlock flock = new StructFlock();
    flock.l_type = (short) (shared ? F_RDLCK : F_WRLCK);
    flock.l_whence = (short) SEEK_SET;
    flock.l_start = position;
    flock.l_len = translateLockLength(size);
    boolean success = false;
    try {
        success = (Libcore.os.fcntlFlock(fd, wait ? F_SETLKW64 : F_SETLK64, flock) != -1);
    } catch (ErrnoException errnoException) {
        throw errnoException.rethrowAsIOException();
    } finally {
        if (!success) {
            removeLock(pendingLock);
        }
    }
    return success ? pendingLock : null;
}

Example 18 with NonWritableChannelException

use of java.nio.channels.NonWritableChannelException in project robovm by robovm.

the class FileChannelImpl method map.

public final MappedByteBuffer map(MapMode mapMode, long position, long size) throws IOException {
    checkOpen();
    if (mapMode == null) {
        throw new NullPointerException("mapMode == null");
    }
    if (position < 0 || size < 0 || size > Integer.MAX_VALUE) {
        throw new IllegalArgumentException("position=" + position + " size=" + size);
    }
    int accessMode = (mode & O_ACCMODE);
    if (accessMode == O_RDONLY) {
        if (mapMode != MapMode.READ_ONLY) {
            throw new NonWritableChannelException();
        }
    } else if (accessMode == O_WRONLY) {
        throw new NonReadableChannelException();
    }
    if (position + size > size()) {
        // and we only care about making our backing file longer here.
        try {
            Libcore.os.ftruncate(fd, position + size);
        } catch (ErrnoException ftruncateException) {
            // continue on.
            try {
                if (S_ISREG(Libcore.os.fstat(fd).st_mode) || ftruncateException.errno != EINVAL) {
                    throw ftruncateException.rethrowAsIOException();
                }
            } catch (ErrnoException fstatException) {
                throw fstatException.rethrowAsIOException();
            }
        }
    }
    long alignment = position - position % Libcore.os.sysconf(_SC_PAGE_SIZE);
    int offset = (int) (position - alignment);
    MemoryBlock block = MemoryBlock.mmap(fd, alignment, size + offset, mapMode);
    return new DirectByteBuffer(block, (int) size, offset, (mapMode == MapMode.READ_ONLY), mapMode);
}

Example 19 with NonWritableChannelException

use of java.nio.channels.NonWritableChannelException in project jdk8u_jdk by JetBrains.

the class FileChannelImpl method tryLock.

public FileLock tryLock(long position, long size, boolean shared) throws IOException {
    ensureOpen();
    if (shared && !readable)
        throw new NonReadableChannelException();
    if (!shared && !writable)
        throw new NonWritableChannelException();
    FileLockImpl fli = new FileLockImpl(this, position, size, shared);
    FileLockTable flt = fileLockTable();
    flt.add(fli);
    int result;
    int ti = threads.add();
    try {
        try {
            ensureOpen();
            result = nd.lock(fd, false, position, size, shared);
        } catch (IOException e) {
            flt.remove(fli);
            throw e;
        }
        if (result == FileDispatcher.NO_LOCK) {
            flt.remove(fli);
            return null;
        }
        if (result == FileDispatcher.RET_EX_LOCK) {
            assert shared;
            FileLockImpl fli2 = new FileLockImpl(this, position, size, false);
            flt.replace(fli, fli2);
            return fli2;
        }
        return fli;
    } finally {
        threads.remove(ti);
    }
}

Example 20 with NonWritableChannelException

use of java.nio.channels.NonWritableChannelException in project jdk8u_jdk by JetBrains.

the class FileChannelImpl method truncate.

public FileChannel truncate(long newSize) throws IOException {
    ensureOpen();
    if (newSize < 0)
        throw new IllegalArgumentException("Negative size");
    if (!writable)
        throw new NonWritableChannelException();
    synchronized (positionLock) {
        int rv = -1;
        long p = -1;
        int ti = -1;
        long rp = -1;
        try {
            begin();
            ti = threads.add();
            if (!isOpen())
                return null;
            // get current size
            long size;
            do {
                size = nd.size(fd);
            } while ((size == IOStatus.INTERRUPTED) && isOpen());
            if (!isOpen())
                return null;
            // get current position
            do {
                p = position0(fd, -1);
            } while ((p == IOStatus.INTERRUPTED) && isOpen());
            if (!isOpen())
                return null;
            assert p >= 0;
            // truncate file if given size is less than the current size
            if (newSize < size) {
                do {
                    rv = nd.truncate(fd, newSize);
                } while ((rv == IOStatus.INTERRUPTED) && isOpen());
                if (!isOpen())
                    return null;
            }
            // if position is beyond new size then adjust it
            if (p > newSize)
                p = newSize;
            do {
                rp = position0(fd, p);
            } while ((rp == IOStatus.INTERRUPTED) && isOpen());
            return this;
        } finally {
            threads.remove(ti);
            end(rv > -1);
            assert IOStatus.check(rv);
        }
    }
}