diff options
Diffstat (limited to 'libjava/classpath/gnu/java/nio/channels/FileChannelImpl.java')
| -rw-r--r-- | libjava/classpath/gnu/java/nio/channels/FileChannelImpl.java | 90 |
1 files changed, 59 insertions, 31 deletions
diff --git a/libjava/classpath/gnu/java/nio/channels/FileChannelImpl.java b/libjava/classpath/gnu/java/nio/channels/FileChannelImpl.java index a87a2e8c597..0ee5d3fc287 100644 --- a/libjava/classpath/gnu/java/nio/channels/FileChannelImpl.java +++ b/libjava/classpath/gnu/java/nio/channels/FileChannelImpl.java @@ -73,6 +73,10 @@ public final class FileChannelImpl extends FileChannel public static final int SYNC = 16; public static final int DSYNC = 32; + public static FileChannelImpl in; + public static FileChannelImpl out; + public static FileChannelImpl err; + private static native void init(); static @@ -83,6 +87,10 @@ public final class FileChannelImpl extends FileChannel } init(); + + in = new FileChannelImpl(0, READ); + out = new FileChannelImpl(1, WRITE); + err = new FileChannelImpl(2, WRITE); } /** @@ -97,6 +105,8 @@ public final class FileChannelImpl extends FileChannel private int mode; + final String description; + /* Open a file. MODE is a combination of the above mode flags. */ /* This is a static factory method, so that VM implementors can decide * substitute subclasses of FileChannelImpl. */ @@ -109,7 +119,8 @@ public final class FileChannelImpl extends FileChannel private FileChannelImpl(File file, int mode) throws FileNotFoundException { - final String path = file.getPath(); + String path = file.getPath(); + description = path; fd = open (path, mode); this.mode = mode; @@ -126,21 +137,26 @@ public final class FileChannelImpl extends FileChannel /* ignore it */ } - throw new FileNotFoundException(path + " is a directory"); + throw new FileNotFoundException(description + " is a directory"); } } - /* Used by init() (native code) */ + /** + * Constructor for default channels in, out and err. + * + * Used by init() (native code). + * + * @param fd the file descriptor (0, 1, 2 for stdin, stdout, stderr). + * + * @param mode READ or WRITE + */ FileChannelImpl (int fd, int mode) { this.fd = fd; this.mode = mode; + this.description = "descriptor(" + fd + ")"; } - public static FileChannelImpl in; - public static FileChannelImpl out; - public static FileChannelImpl err; - private native int open (String path, int mode) throws FileNotFoundException; public native int available () throws IOException; @@ -179,7 +195,7 @@ public final class FileChannelImpl extends FileChannel throws IOException { if (position < 0) - throw new IllegalArgumentException (); + throw new IllegalArgumentException ("position: " + position); long oldPosition = implPosition (); position (position); int result = read(dst); @@ -230,7 +246,7 @@ public final class FileChannelImpl extends FileChannel throws IOException { if (position < 0) - throw new IllegalArgumentException (); + throw new IllegalArgumentException ("position: " + position); if (!isOpen ()) throw new ClosedChannelException (); @@ -288,10 +304,11 @@ public final class FileChannelImpl extends FileChannel throw new NonWritableChannelException(); } else - throw new IllegalArgumentException (); + throw new IllegalArgumentException ("mode: " + mode); if (position < 0 || size < 0 || size > Integer.MAX_VALUE) - throw new IllegalArgumentException (); + throw new IllegalArgumentException ("position: " + position + + ", size: " + size); return mapImpl(nmode, position, (int) size); } @@ -336,7 +353,8 @@ public final class FileChannelImpl extends FileChannel { if (position < 0 || count < 0) - throw new IllegalArgumentException (); + throw new IllegalArgumentException ("position: " + position + + ", count: " + count); if (!isOpen ()) throw new ClosedChannelException (); @@ -399,7 +417,8 @@ public final class FileChannelImpl extends FileChannel { if (position < 0 || count < 0) - throw new IllegalArgumentException (); + throw new IllegalArgumentException ("position: " + position + + ", count: " + count); if (!isOpen ()) throw new ClosedChannelException (); @@ -424,24 +443,31 @@ public final class FileChannelImpl extends FileChannel return total; } - public FileLock tryLock (long position, long size, boolean shared) + // Shared sanity checks between lock and tryLock methods. + private void lockCheck(long position, long size, boolean shared) throws IOException { if (position < 0 || size < 0) - throw new IllegalArgumentException (); + throw new IllegalArgumentException ("position: " + position + + ", size: " + size); if (!isOpen ()) - throw new ClosedChannelException (); + throw new ClosedChannelException(); - if (shared && (mode & READ) == 0) - throw new NonReadableChannelException (); - - if (!shared && (mode & WRITE) == 0) - throw new NonWritableChannelException (); + if (shared && ((mode & READ) == 0)) + throw new NonReadableChannelException(); + if (!shared && ((mode & WRITE) == 0)) + throw new NonWritableChannelException(); + } + + public FileLock tryLock (long position, long size, boolean shared) + throws IOException + { + lockCheck(position, size, shared); + boolean completed = false; - try { begin(); @@ -468,15 +494,9 @@ public final class FileChannelImpl extends FileChannel public FileLock lock (long position, long size, boolean shared) throws IOException { - if (position < 0 - || size < 0) - throw new IllegalArgumentException (); - - if (!isOpen ()) - throw new ClosedChannelException (); + lockCheck(position, size, shared); boolean completed = false; - try { boolean lockable = lock(position, size, shared, true); @@ -504,7 +524,7 @@ public final class FileChannelImpl extends FileChannel throws IOException { if (newPosition < 0) - throw new IllegalArgumentException (); + throw new IllegalArgumentException ("newPostition: " + newPosition); if (!isOpen ()) throw new ClosedChannelException (); @@ -519,7 +539,7 @@ public final class FileChannelImpl extends FileChannel throws IOException { if (size < 0) - throw new IllegalArgumentException (); + throw new IllegalArgumentException ("size: " + size); if (!isOpen ()) throw new ClosedChannelException (); @@ -532,4 +552,12 @@ public final class FileChannelImpl extends FileChannel return this; } + + public String toString() + { + return (this.getClass() + + "[fd=" + fd + + ",mode=" + mode + "," + + description + "]"); + } } |
