abstract long writeToFileAtURL()

in src/android/Filesystem.java [296:336]
35 lines of code
4 McCabe index (conditional complexity)

	abstract long writeToFileAtURL(LocalFilesystemURL inputURL, String data, int offset,
			boolean isBinary) throws NoModificationAllowedException, IOException;

	abstract long truncateFileAtURL(LocalFilesystemURL inputURL, long size)
			throws IOException, NoModificationAllowedException;

	// This method should return null if filesystem urls cannot be mapped to paths
	abstract String filesystemPathForURL(LocalFilesystemURL url);

	abstract LocalFilesystemURL URLforFilesystemPath(String path);

	abstract boolean canRemoveFileAtLocalURL(LocalFilesystemURL inputURL);

    protected class LimitedInputStream extends FilterInputStream {
        long numBytesToRead;
        public LimitedInputStream(InputStream in, long numBytesToRead) {
            super(in);
            this.numBytesToRead = numBytesToRead;
        }
        @Override
        public int read() throws IOException {
            if (numBytesToRead <= 0) {
                return -1;
            }
            numBytesToRead--;
            return in.read();
        }
        @Override
        public int read(byte[] buffer, int byteOffset, int byteCount) throws IOException {
            if (numBytesToRead <= 0) {
                return -1;
            }
            int bytesToRead = byteCount;
            if (byteCount > numBytesToRead) {
                bytesToRead = (int)numBytesToRead; // Cast okay; long is less than int here.
            }
            int numBytesRead = in.read(buffer, byteOffset, bytesToRead);
            numBytesToRead -= numBytesRead;
            return numBytesRead;
        }
    }