Example usage for org.apache.poi.poifs.filesystem DocumentInputStream skip

Introduction

In this page you can find the example usage for org.apache.poi.poifs.filesystem DocumentInputStream skip.

Prototype

@Override
    public long skip(long n) throws IOException 

Source Link

Usage

From source file:org.ddt.listener.ole.FileMoniker.java

License:Apache License

/**
 * Helper function that populates the fields of this moniker from the given stream
 *
 * @param inStream the stream to read from
 * @throws IOException//from   ww  w  . j a va 2s  .c  o  m
 * @  throws
 *                                                                                                                                                                                        BadOleStreamException
 */
private void populate(DocumentInputStream inStream) throws IOException, BadOleStreamException {

    cAnti = inStream.readShort();

    ansiLength = inStream.readInt();
    ansiPath = new byte[ansiLength - 1]; //don't get the last char (\0)
    if (inStream.read(ansiPath) != ansiLength - 1) {
        throw new BadOleStreamException("Couldn't read Path.");
    }
    inStream.skip(1); //skip the string terminating null char

    endServer = inStream.readShort();

    versionNumber = inStream.readShort();
    if (versionNumber != VERSION_NUMBER) {
        throw new BadOleStreamException("wrong version number: " + this.getVersionNumberHexString());
    }

    inStream.skip(20); //skip the two reserved fields. should check that they are both 0.

    unicodePathSize = inStream.readInt();

    //the rest of the fields only exist if unicodePathSize > 0
    if (unicodePathSize <= 0) {
        return;
    }

    unicodePathBytes = inStream.readInt();
    usKeyValue = inStream.readShort();

    //should really make this a char array or a string.
    unicodePath = new byte[unicodePathBytes];
    for (int i = 0; i < (unicodePathBytes); i++) {
        unicodePath[i] = inStream.readByte();
    }
}

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From source file:org.ddt.listener.ole.OleStreamListener.java

License:Apache License

/**
 * Reads a "\1Ole" stream and stores the links found in it.
 * <p/>//  ww w .j av  a2 s  . c  o  m
 * This method returns (fairly) quietly if the stream fails (it doesn't throw exceptions)
 * There are a number of ways that this can fail, not all of which are bad.
 * For instance, POIFSReaderEvent doesn't contain an OLE stream, this is not
 * a disaster, we just need to return quickly.
 *
 * @param event document to process
 */
public void processPOIFSReaderEvent(POIFSReaderEvent event) {
    log.log(Level.FINEST, "Processing Document: {0}/{1}", new Object[] { event.getPath(), event.getName() });
    DocumentInputStream docInStream = event.getStream();

    if (docInStream.available() < LittleEndian.INT_SIZE)
        return;

    if (docInStream.readInt() != VALID_VERSION) {
        log.log(Level.INFO, "Invalid signature - not an OLE Stream.");
        docInStream.close();
        return;
    }
    try {
        docInStream.skip(LittleEndian.INT_SIZE); //ignore what I think might be LinkUpdateOptions
        //check it's a linked object, not embedded
        if (docInStream.readInt() != 1) {
            log.log(Level.FINER, "Not a link");
            docInStream.close();
            return;
        }

        //check reserved field = 0
        if (docInStream.readInt() != 0x000000) {
            docInStream.close();
            return;
        }

        Moniker m;
        String relPath = null;
        String absPath = null;
        byte[] clsid = new byte[16];
        //source moniker, not really interesting.
        if ((docInStream.readInt()) > 0) {
            docInStream.read(clsid);
            ClassID cid = new ClassID(clsid, 0);
            MonikerFactory.getMoniker(cid, docInStream);
        }
        if ((docInStream.readInt()) > 0) {
            docInStream.read(clsid);
            ClassID cid = new ClassID(clsid, 0);
            m = MonikerFactory.getMoniker(cid, docInStream);
            if (m != null)
                relPath = m.getLink();
        }
        if ((docInStream.readInt()) > 0) {
            docInStream.read(clsid);
            ClassID cid = new ClassID(clsid, 0);
            m = MonikerFactory.getMoniker(cid, docInStream);
            if (m != null)
                absPath = m.getLink();
        }

        Link l = new Link(1);
        l.addRelativePath(cleanURLString(relPath));
        l.addAbsolutePath(absPath);
        this.add(l);
    } catch (IOException ex) {
        log.log(Level.FINE, ex.getLocalizedMessage());
    } catch (BadOleStreamException ex) {
        log.log(Level.INFO, ex.getMessage());
    } finally {
        docInStream.close();
    }
}

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From source file:org.ddt.listener.ole.URLMoniker.java

License:Apache License

/**
 * Constructor./*  w  w  w.jav a2  s  .co  m*/
 * <p/>
 * @param is an opened DocumentInputStream, positioned at the beginning of
 * the moniker structure.
 * @throws IOException if something goes wrong with the DocumentInputStream.
 */
URLMoniker(DocumentInputStream is) throws IOException {
    length = is.readInt();
    byte[] b = new byte[length];
    is.read(b);
    String tempUrl = new String(b);
    //check what 'length' means.
    int termPos = tempUrl.indexOf("\0");
    if (termPos < (tempUrl.length() - 1)) //it means structure length
    {
        URL = tempUrl.substring(0, termPos);
    } else //it means string length
    {
        URL = tempUrl;
        is.skip(24); //it didn't read to the end of the struct.
    }

}

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From source file:tv.amwa.maj.io.aaf.AAFStream.java

License:Apache License

public ByteBuffer read(int noOfBytes) throws EndOfDataException, IOException, IllegalArgumentException {

    DocumentInputStream dis = getDocumentInputStream();
    long actualSkip = dis.skip(position);

    if (actualSkip < position)
        throw new EndOfDataException("Position plus length is longer than the AAF stream.");
    byte[] bytes = new byte[noOfBytes];
    position += dis.read(bytes);/*ww w.j a  va 2s .c  o m*/

    return ByteBuffer.wrap(bytes);
}

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