Example usage for java.util.jar Attributes size

Introduction

In this page you can find the example usage for java.util.jar Attributes size.

Prototype

public int size() 

Source Link

Document

Returns the number of attributes in this Map.

Usage

From source file:net.sf.keystore_explorer.crypto.signing.JarSigner.java

private static String getManifestEntriesAttrs(JarFile jar) throws IOException {

    StringBuilder sbManifest = new StringBuilder();

    // Get current manifest
    Manifest manifest = jar.getManifest();

    // Write out entry attributes to manifest
    if (manifest != null) {
        // Get entry attributes
        Map<String, Attributes> entries = manifest.getEntries();

        boolean firstEntry = true;

        // For each entry...
        for (String entryName : entries.keySet()) {
            // Get entry's attributes
            Attributes entryAttrs = entries.get(entryName);

            // Completely ignore entries that contain only a xxx-Digest
            // attribute
            if ((entryAttrs.size() == 1) && (entryAttrs.keySet().toArray()[0].toString().endsWith("-Digest"))) {
                continue;
            }//from w ww  . j a v a 2 s.c o m

            if (!firstEntry) {
                // Entries subequent to the first are split by a newline
                sbManifest.append(CRLF);
            }

            // Get entry attributes as a string to preserve their order
            String manifestEntryAttributes = getManifestEntryAttrs(jar, entryName);

            // Write them out
            sbManifest.append(manifestEntryAttributes);

            // The next entry will not be the first entry
            firstEntry = false;
        }
    }

    return sbManifest.toString();
}

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From source file:com.facebook.buck.jvm.java.JarDirectoryStepTest.java

/**
 * From the constructor of {@link JarInputStream}:
 * <p>/* w w  w. ja  v a 2 s  .  c  o  m*/
 * This implementation assumes the META-INF/MANIFEST.MF entry
 * should be either the first or the second entry (when preceded
 * by the dir META-INF/). It skips the META-INF/ and then
 * "consumes" the MANIFEST.MF to initialize the Manifest object.
 * <p>
 * A simple implementation of {@link JarDirectoryStep} would iterate over all entries to be
 * included, adding them to the output jar, while merging manifest files, writing the merged
 * manifest as the last item in the jar. That will generate jars the {@code JarInputStream} won't
 * be able to find the manifest for.
 */
@Test
public void manifestShouldBeSecondEntryInJar() throws IOException {
    Path manifestPath = Paths.get(JarFile.MANIFEST_NAME);

    // Create a directory with a manifest in it and more than two files.
    Path dir = folder.newFolder();
    Manifest dirManifest = new Manifest();
    Attributes attrs = new Attributes();
    attrs.putValue("From-Dir", "cheese");
    dirManifest.getEntries().put("Section", attrs);

    Files.createDirectories(dir.resolve(manifestPath).getParent());
    try (OutputStream out = Files.newOutputStream(dir.resolve(manifestPath))) {
        dirManifest.write(out);
    }
    Files.write(dir.resolve("A.txt"), "hello world".getBytes(UTF_8));
    Files.write(dir.resolve("B.txt"), "hello world".getBytes(UTF_8));
    Files.write(dir.resolve("aa.txt"), "hello world".getBytes(UTF_8));
    Files.write(dir.resolve("bb.txt"), "hello world".getBytes(UTF_8));

    // Create a jar with a manifest and more than two other files.
    Path inputJar = folder.newFile("example.jar");
    try (ZipOutputStream zos = new ZipOutputStream(Files.newOutputStream(inputJar))) {
        byte[] data = "hello world".getBytes(UTF_8);
        ZipEntry entry = new ZipEntry("C.txt");
        zos.putNextEntry(entry);
        zos.write(data, 0, data.length);
        zos.closeEntry();

        entry = new ZipEntry("cc.txt");
        zos.putNextEntry(entry);
        zos.write(data, 0, data.length);
        zos.closeEntry();

        entry = new ZipEntry("META-INF/");
        zos.putNextEntry(entry);
        zos.closeEntry();

        // Note: at end of the stream. Technically invalid.
        entry = new ZipEntry(JarFile.MANIFEST_NAME);
        zos.putNextEntry(entry);
        Manifest zipManifest = new Manifest();
        attrs = new Attributes();
        attrs.putValue("From-Zip", "peas");
        zipManifest.getEntries().put("Section", attrs);
        zipManifest.write(zos);
        zos.closeEntry();
    }

    // Merge and check that the manifest includes everything
    Path output = folder.newFile("output.jar");
    JarDirectoryStep step = new JarDirectoryStep(new FakeProjectFilesystem(folder.getRoot()), output,
            ImmutableSortedSet.of(dir, inputJar), null, null);
    int exitCode = step.execute(TestExecutionContext.newInstance()).getExitCode();

    assertEquals(0, exitCode);

    Manifest manifest;
    try (InputStream is = Files.newInputStream(output); JarInputStream jis = new JarInputStream(is)) {
        manifest = jis.getManifest();
    }

    assertNotNull(manifest);
    Attributes readAttributes = manifest.getAttributes("Section");
    assertEquals(2, readAttributes.size());
    assertEquals("cheese", readAttributes.getValue("From-Dir"));
    assertEquals("peas", readAttributes.getValue("From-Zip"));
}

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