Examples with NDocumentOutputStream org.apache.poi.poifs.filesystem.NDocumentOutputStream used on opensource projects

Example 1 with NDocumentOutputStream

use of org.apache.poi.poifs.filesystem.NDocumentOutputStream in project poi by apache.

the class TestWrite method inPlaceNPOIFSWrite.

/**
     * Tests that when using NPOIFS, we can do an in-place write
     *  without needing to stream in + out the whole kitchen sink
     */
@Test
public void inPlaceNPOIFSWrite() throws Exception {
    NPOIFSFileSystem fs = null;
    DirectoryEntry root = null;
    DocumentNode sinfDoc = null;
    DocumentNode dinfDoc = null;
    SummaryInformation sinf = null;
    DocumentSummaryInformation dinf = null;
    // We need to work on a File for in-place changes, so create a temp one
    final File copy = TempFile.createTempFile("Test-HPSF", "ole2");
    copy.deleteOnExit();
    // Copy a test file over to our temp location
    InputStream inp = _samples.openResourceAsStream("TestShiftJIS.doc");
    FileOutputStream out = new FileOutputStream(copy);
    IOUtils.copy(inp, out);
    inp.close();
    out.close();
    // Open the copy in read/write mode
    fs = new NPOIFSFileSystem(copy, false);
    root = fs.getRoot();
    // Read the properties in there
    sinfDoc = (DocumentNode) root.getEntry(SummaryInformation.DEFAULT_STREAM_NAME);
    dinfDoc = (DocumentNode) root.getEntry(DocumentSummaryInformation.DEFAULT_STREAM_NAME);
    InputStream sinfStream = new NDocumentInputStream(sinfDoc);
    sinf = (SummaryInformation) PropertySetFactory.create(sinfStream);
    sinfStream.close();
    assertEquals(131077, sinf.getOSVersion());
    InputStream dinfStream = new NDocumentInputStream(dinfDoc);
    dinf = (DocumentSummaryInformation) PropertySetFactory.create(dinfStream);
    dinfStream.close();
    assertEquals(131077, dinf.getOSVersion());
    // Check they start as we expect
    assertEquals("Reiichiro Hori", sinf.getAuthor());
    assertEquals("Microsoft Word 9.0", sinf.getApplicationName());
    assertEquals("第1章", sinf.getTitle());
    assertEquals("", dinf.getCompany());
    assertEquals(null, dinf.getManager());
    // Do an in-place replace via an InputStream
    new NPOIFSDocument(sinfDoc).replaceContents(sinf.toInputStream());
    new NPOIFSDocument(dinfDoc).replaceContents(dinf.toInputStream());
    // Check it didn't get changed
    sinfDoc = (DocumentNode) root.getEntry(SummaryInformation.DEFAULT_STREAM_NAME);
    dinfDoc = (DocumentNode) root.getEntry(DocumentSummaryInformation.DEFAULT_STREAM_NAME);
    InputStream sinfStream2 = new NDocumentInputStream(sinfDoc);
    sinf = (SummaryInformation) PropertySetFactory.create(sinfStream2);
    sinfStream2.close();
    assertEquals(131077, sinf.getOSVersion());
    InputStream dinfStream2 = new NDocumentInputStream(dinfDoc);
    dinf = (DocumentSummaryInformation) PropertySetFactory.create(dinfStream2);
    dinfStream2.close();
    assertEquals(131077, dinf.getOSVersion());
    // Start again!
    fs.close();
    inp = _samples.openResourceAsStream("TestShiftJIS.doc");
    out = new FileOutputStream(copy);
    IOUtils.copy(inp, out);
    inp.close();
    out.close();
    fs = new NPOIFSFileSystem(copy, false);
    root = fs.getRoot();
    // Read the properties in once more
    sinfDoc = (DocumentNode) root.getEntry(SummaryInformation.DEFAULT_STREAM_NAME);
    dinfDoc = (DocumentNode) root.getEntry(DocumentSummaryInformation.DEFAULT_STREAM_NAME);
    InputStream sinfStream3 = new NDocumentInputStream(sinfDoc);
    sinf = (SummaryInformation) PropertySetFactory.create(sinfStream3);
    sinfStream3.close();
    assertEquals(131077, sinf.getOSVersion());
    InputStream dinfStream3 = new NDocumentInputStream(dinfDoc);
    dinf = (DocumentSummaryInformation) PropertySetFactory.create(dinfStream3);
    dinfStream3.close();
    assertEquals(131077, dinf.getOSVersion());
    // Have them write themselves in-place with no changes, as an OutputStream
    OutputStream soufStream = new NDocumentOutputStream(sinfDoc);
    sinf.write(soufStream);
    soufStream.close();
    OutputStream doufStream = new NDocumentOutputStream(dinfDoc);
    dinf.write(doufStream);
    doufStream.close();
    // And also write to some bytes for checking
    ByteArrayOutputStream sinfBytes = new ByteArrayOutputStream();
    sinf.write(sinfBytes);
    ByteArrayOutputStream dinfBytes = new ByteArrayOutputStream();
    dinf.write(dinfBytes);
    // Check that the filesystem can give us back the same bytes
    sinfDoc = (DocumentNode) root.getEntry(SummaryInformation.DEFAULT_STREAM_NAME);
    dinfDoc = (DocumentNode) root.getEntry(DocumentSummaryInformation.DEFAULT_STREAM_NAME);
    InputStream sinfStream4 = new NDocumentInputStream(sinfDoc);
    byte[] sinfData = IOUtils.toByteArray(sinfStream4);
    sinfStream4.close();
    InputStream dinfStream4 = new NDocumentInputStream(dinfDoc);
    byte[] dinfData = IOUtils.toByteArray(dinfStream4);
    dinfStream4.close();
    assertThat(sinfBytes.toByteArray(), equalTo(sinfData));
    assertThat(dinfBytes.toByteArray(), equalTo(dinfData));
    // Read back in as-is
    InputStream sinfStream5 = new NDocumentInputStream(sinfDoc);
    sinf = (SummaryInformation) PropertySetFactory.create(sinfStream5);
    sinfStream5.close();
    assertEquals(131077, sinf.getOSVersion());
    InputStream dinfStream5 = new NDocumentInputStream(dinfDoc);
    dinf = (DocumentSummaryInformation) PropertySetFactory.create(dinfStream5);
    dinfStream5.close();
    assertEquals(131077, dinf.getOSVersion());
    assertEquals("Reiichiro Hori", sinf.getAuthor());
    assertEquals("Microsoft Word 9.0", sinf.getApplicationName());
    assertEquals("第1章", sinf.getTitle());
    assertEquals("", dinf.getCompany());
    assertEquals(null, dinf.getManager());
    // Now alter a few of them
    sinf.setAuthor("Changed Author");
    sinf.setTitle("Le titre était changé");
    dinf.setManager("Changed Manager");
    // Save this into the filesystem
    OutputStream soufStream2 = new NDocumentOutputStream(sinfDoc);
    sinf.write(soufStream2);
    soufStream2.close();
    OutputStream doufStream2 = new NDocumentOutputStream(dinfDoc);
    dinf.write(doufStream2);
    doufStream2.close();
    // Read them back in again
    sinfDoc = (DocumentNode) root.getEntry(SummaryInformation.DEFAULT_STREAM_NAME);
    InputStream sinfStream6 = new NDocumentInputStream(sinfDoc);
    sinf = (SummaryInformation) PropertySetFactory.create(sinfStream6);
    sinfStream6.close();
    assertEquals(131077, sinf.getOSVersion());
    dinfDoc = (DocumentNode) root.getEntry(DocumentSummaryInformation.DEFAULT_STREAM_NAME);
    InputStream dinfStream6 = new NDocumentInputStream(dinfDoc);
    dinf = (DocumentSummaryInformation) PropertySetFactory.create(dinfStream6);
    dinfStream6.close();
    assertEquals(131077, dinf.getOSVersion());
    assertEquals("Changed Author", sinf.getAuthor());
    assertEquals("Microsoft Word 9.0", sinf.getApplicationName());
    assertEquals("Le titre était changé", sinf.getTitle());
    assertEquals("", dinf.getCompany());
    assertEquals("Changed Manager", dinf.getManager());
    // Close the whole filesystem, and open it once more
    fs.writeFilesystem();
    fs.close();
    fs = new NPOIFSFileSystem(copy);
    root = fs.getRoot();
    // Re-check on load
    sinfDoc = (DocumentNode) root.getEntry(SummaryInformation.DEFAULT_STREAM_NAME);
    InputStream sinfStream7 = new NDocumentInputStream(sinfDoc);
    sinf = (SummaryInformation) PropertySetFactory.create(sinfStream7);
    sinfStream7.close();
    assertEquals(131077, sinf.getOSVersion());
    dinfDoc = (DocumentNode) root.getEntry(DocumentSummaryInformation.DEFAULT_STREAM_NAME);
    InputStream dinfStream7 = new NDocumentInputStream(dinfDoc);
    dinf = (DocumentSummaryInformation) PropertySetFactory.create(dinfStream7);
    dinfStream7.close();
    assertEquals(131077, dinf.getOSVersion());
    assertEquals("Changed Author", sinf.getAuthor());
    assertEquals("Microsoft Word 9.0", sinf.getApplicationName());
    assertEquals("Le titre était changé", sinf.getTitle());
    assertEquals("", dinf.getCompany());
    assertEquals("Changed Manager", dinf.getManager());
    // Tidy up
    fs.close();
    copy.delete();
}