Example usage for org.apache.commons.vfs2 RandomAccessContent readFully

Introduction

In this page you can find the example usage for org.apache.commons.vfs2 RandomAccessContent readFully.

Prototype

void readFully(byte b[]) throws IOException;

Source Link

Document

Reads some bytes from an input stream and stores them into the buffer array b .

Usage

From source file:org.freedesktop.mime.MagicEntry.java

public boolean match(FileObject file) throws IOException {
    RandomAccessContent s = file.getContent().getRandomAccessContent(RandomAccessMode.READ);
    try {/* w w w .j  a  v a 2  s . c om*/
        for (Pattern p : this) {

            byte[] val = p.getValue();
            byte[] mask = p.getMask();

            // Read in portion of file
            ByteBuffer buf = ByteBuffer.allocate(p.getRangeLength() + val.length);
            s.seek(p.getOffset());
            byte[] bufArr = buf.array();
            s.readFully(bufArr);

            int valIdx = 0;
            for (int i = 0; i < bufArr.length; i++) {
                if ((bufArr[i] & mask[valIdx]) == (val[valIdx] & mask[valIdx])) {
                    valIdx++;
                    if (valIdx == val.length) {
                        return true;
                    }
                } else {
                    valIdx = 0;
                }
            }
        }
    } finally {
        s.close();
    }
    return false;
}

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