Example usage for org.apache.poi.openxml4j.opc PackagePart getSize

Introduction

In this page you can find the example usage for org.apache.poi.openxml4j.opc PackagePart getSize.

Prototype

public long getSize() 

Source Link

Usage

From source file:org.apache.tika.parser.microsoft.ooxml.AbstractOOXMLExtractor.java

License:Apache License

/**
 * Handles an embedded OLE object in the document
 *///from   www.ja  v  a 2 s  .  com
private void handleEmbeddedOLE(PackagePart part, ContentHandler handler, String rel)
        throws IOException, SAXException {
    // A POIFSFileSystem needs to be at least 3 blocks big to be valid
    if (part.getSize() >= 0 && part.getSize() < 512 * 3) {
        // Too small, skip
        return;
    }

    // Open the POIFS (OLE2) structure and process
    POIFSFileSystem fs = new POIFSFileSystem(part.getInputStream());
    try {
        Metadata metadata = new Metadata();
        TikaInputStream stream = null;
        metadata.set(Metadata.EMBEDDED_RELATIONSHIP_ID, rel);

        DirectoryNode root = fs.getRoot();
        POIFSDocumentType type = POIFSDocumentType.detectType(root);

        if (root.hasEntry("CONTENTS") && root.hasEntry("\u0001Ole") && root.hasEntry("\u0001CompObj")
                && root.hasEntry("\u0003ObjInfo")) {
            // TIKA-704: OLE 2.0 embedded non-Office document?
            stream = TikaInputStream.get(fs.createDocumentInputStream("CONTENTS"));
            if (embeddedExtractor.shouldParseEmbedded(metadata)) {
                embeddedExtractor.parseEmbedded(stream, new EmbeddedContentHandler(handler), metadata, false);
            }
        } else if (POIFSDocumentType.OLE10_NATIVE == type) {
            // TIKA-704: OLE 1.0 embedded document
            Ole10Native ole = Ole10Native.createFromEmbeddedOleObject(fs);
            if (ole.getLabel() != null) {
                metadata.set(Metadata.RESOURCE_NAME_KEY, ole.getLabel());
            }
            byte[] data = ole.getDataBuffer();
            if (data != null) {
                stream = TikaInputStream.get(data);
            }

            if (stream != null && embeddedExtractor.shouldParseEmbedded(metadata)) {
                embeddedExtractor.parseEmbedded(stream, new EmbeddedContentHandler(handler), metadata, false);
            }
        } else {
            handleEmbeddedFile(part, handler, rel);
        }
    } catch (FileNotFoundException e) {
        // There was no CONTENTS entry, so skip this part
    } catch (Ole10NativeException e) {
        // Could not process an OLE 1.0 entry, so skip this part
    }
}

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