Example usage for org.apache.poi.hpsf Thumbnail Thumbnail

Introduction

In this page you can find the example usage for org.apache.poi.hpsf Thumbnail Thumbnail.

Prototype

public Thumbnail(final byte[] thumbnailData) 

Source Link

Document

Creates a Thumbnail instance and initializes with the specified image bytes.

Usage

From source file:com.oneis.graphics.ThumbnailFinder.java

License:Mozilla Public License

/**
 * Try and get a thumbnail from an old Microsoft Office document
 *//*from  w  ww  .j  av a2  s . com*/
private void findFromOldMSOffice() {
    try {
        File poiFilesystem = new File(inFilename);

        // Open the POI filesystem.
        InputStream is = new FileInputStream(poiFilesystem);
        POIFSFileSystem poifs = new POIFSFileSystem(is);
        is.close();

        // Read the summary information.
        DirectoryEntry dir = poifs.getRoot();
        DocumentEntry siEntry = (DocumentEntry) dir.getEntry(SummaryInformation.DEFAULT_STREAM_NAME);
        DocumentInputStream dis = new DocumentInputStream(siEntry);
        PropertySet ps = new PropertySet(dis);
        dis.close();
        SummaryInformation si = new SummaryInformation(ps);
        if (si != null) {
            byte[] thumbnailData = si.getThumbnail();
            if (thumbnailData != null) {
                Thumbnail thumbnail = new Thumbnail(thumbnailData);
                byte[] wmf = thumbnail.getThumbnailAsWMF();
                // Got something!
                thumbnailDimensions = tryWMFFormat(new ByteArrayInputStream(wmf), outFilename, outFormat,
                        maxDimension);
            }
        }
    } catch (Exception e) {
        logIgnoredException("ThumbnailFinder Apache POI file reading failed", e);
    }
}

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