Examples with FilterInputStream java.io.FilterInputStream used on opensource projects

Example 26 with FilterInputStream

use of java.io.FilterInputStream in project poi by apache.

the class TestHwmfParsing method fetchWmfFromGovdocs.

@Test
@Ignore("This is work-in-progress and not a real unit test ...")
public void fetchWmfFromGovdocs() throws IOException {
    URL url = new URL("http://digitalcorpora.org/corpora/files/govdocs1/by_type/ppt.zip");
    File outdir = new File("build/ppt");
    outdir.mkdirs();
    ZipInputStream zis = new ZipInputStream(url.openStream());
    ZipEntry ze;
    while ((ze = zis.getNextEntry()) != null) {
        String basename = ze.getName().replaceAll(".*?([^/]+)\\.wmf", "$1");
        FilterInputStream fis = new FilterInputStream(zis) {

            @Override
            public void close() throws IOException {
            }
        };
        try {
            SlideShow<?, ?> ss = SlideShowFactory.create(fis);
            int wmfIdx = 1;
            for (PictureData pd : ss.getPictureData()) {
                if (pd.getType() != PictureType.WMF)
                    continue;
                byte[] wmfData = pd.getData();
                String filename = String.format(Locale.ROOT, "%s-%04d.wmf", basename, wmfIdx);
                FileOutputStream fos = new FileOutputStream(new File(outdir, filename));
                fos.write(wmfData);
                fos.close();
                wmfIdx++;
            }
            ss.close();
        } catch (Exception e) {
            System.out.println(ze.getName() + " ignored.");
        }
    }
}