public void parse(InputStream stream, ContentHandler handler, Metadata metadata,
                      ParseContext context) throws IOException, SAXException, TikaException {

        //Set MIME type as grib2
        metadata.set(Metadata.CONTENT_TYPE, GRIB_MIME_TYPE);
        //grib was not cleaning up its temp files no matter what we tried
        //this is a work around the creates a temp directory then copies the full input file
        //into that tmp directory.  We then delete the directory in the finally statement.
        Path tmpDir = Files.createTempDirectory("tika-grib-");

        try {
            XHTMLContentHandler xhtml;
            Path gribFile = Files.createTempFile(tmpDir, "tika-file", ".grib2");
            Files.copy(stream, gribFile, StandardCopyOption.REPLACE_EXISTING);

            try (NetcdfFile ncFile = NetcdfDataset.openFile(gribFile.toString(), null)) {

                // first parse out the set of global attributes
                for (Attribute attr : ncFile.getGlobalAttributes()) {
                    Property property = resolveMetadataKey(attr.getFullName());
                    if (attr.getDataType().isString()) {
                        metadata.add(property, attr.getStringValue());
                    } else if (attr.getDataType().isNumeric()) {
                        int value = attr.getNumericValue().intValue();
                        metadata.add(property, String.valueOf(value));
                    }
                }

                xhtml = new XHTMLContentHandler(handler, metadata);

                xhtml.startDocument();

                xhtml.newline();
                xhtml.startElement("ul");
                xhtml.characters("dimensions:");
                xhtml.newline();

                for (Dimension dim : ncFile.getDimensions()) {
                    xhtml.element("li",
                            dim.getFullName() + "=" + String.valueOf(dim.getLength()) + ";");
                    xhtml.newline();
                }

                xhtml.startElement("ul");
                xhtml.characters("variables:");
                xhtml.newline();

                for (Variable var : ncFile.getVariables()) {
                    xhtml.element("p",
                            String.valueOf(var.getDataType()) + var.getNameAndDimensions() + ";");
                    for (Attribute element : var.getAttributes()) {
                        xhtml.element("li", " :" + element + ";");
                        xhtml.newline();
                    }
                }
            }
            xhtml.endElement("ul");
            xhtml.endElement("ul");
            xhtml.endDocument();

        } catch (IOException e) {
            throw new TikaException("NetCDF parse error", e);
        } finally {
            FileUtils.deleteDirectory(tmpDir.toFile());
        }
    }
@Test
    public void testParseGlobalMetadata() throws Exception {
        Parser parser = new GribParser();
        Metadata metadata = new Metadata();
        ContentHandler handler = new BodyContentHandler();
        try (InputStream stream = GribParser.class
                .getResourceAsStream("/test-documents/gdas1.forecmwf.2014062612.grib2")) {
            parser.parse(stream, handler, metadata, new ParseContext());
        }
        assertNotNull(metadata);
        String content = handler.toString();
        assertTrue(content.contains("dimensions:"));
        assertTrue(content.contains("variables:"));
    }