Examples of org.apache.harmony.pack200.Segment

org.apache.harmony.pack200.Segment
A Pack200 archive consists of one (or more) segments. Each segment is standalone, in the sense that every segment has the magic number header; thus, every segment is also a valid archive. However, it is possible to combine (non-GZipped) archives into a single large archive by concatenation alone. Thus all the hard work in unpacking an archive falls to understanding a segment. This class implements the Pack200 specification by an entry point ( {@link #parse(InputStream)}) which in turn delegates to a variety of other parse methods. Each parse method corresponds (roughly) to the name of the bands in the Pack200 specification. The first component of a segment is the header; this contains (amongst other things) the expected counts of constant pool entries, which in turn defines how many values need to be read from the stream. Because values are variable width (see {@link Codec}), it is not possible to calculate the start of the next segment, although one of the header values does hint at the size of the segment if non-zero, which can be used for buffering purposes. Note that this does not perform any buffering of the input stream; each value will be read on a byte-by-byte basis. It does not perform GZip decompression automatically; both of these are expected to be done by the caller if the stream has the magic header for GZip streams ( {@link GZIPInputStream#GZIP_MAGIC}). In any case, if GZip decompression is being performed the input stream will be buffered at a higher level, and thus this can read on a byte-oriented basis. @author Alex Blewitt @version $Revision: $

    assertEquals("Zero",layout.getValue(1, segment.getConstantPool()));
    assertEquals("One",layout.getValue(2, segment.getConstantPool()));
  }
  public void testLayoutRS() throws Pack200Exception {
    AttributeLayout layout = new AttributeLayout("RS",AttributeLayout.CONTEXT_CLASS,"RS", 1);
    Segment segment = new TestSegment();
    assertNull(layout.getValue(-1, segment.getConstantPool()));
    assertEquals("Ein",layout.getValue(0, segment.getConstantPool()));
    assertEquals("Zwei",layout.getValue(1, segment.getConstantPool()));
  }

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    assertEquals("Ein",layout.getValue(0, segment.getConstantPool()));
    assertEquals("Zwei",layout.getValue(1, segment.getConstantPool()));
  }
  public void testLayoutRSN() throws Pack200Exception {
    AttributeLayout layout = new AttributeLayout("RSN",AttributeLayout.CONTEXT_CLASS,"RSN", 1);
    Segment segment = new TestSegment();
    assertNull(layout.getValue(0, segment.getConstantPool()));
    assertEquals("Ein",layout.getValue(1, segment.getConstantPool()));
    assertEquals("Zwei",layout.getValue(2, segment.getConstantPool()));
  }

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    JarOutputStream out;


    public void testHelloWorld() throws Exception {
        in = Segment.class
                .getResourceAsStream("/org/apache/harmony/pack200/tests/HelloWorld.pack");
        Segment segment = Segment.parse(in);
        assertNotNull(segment);
        File file = File.createTempFile("hello", "world.jar");
        out = new JarOutputStream(new FileOutputStream(file));
        segment.writeJar(out);
        out.close();
        out = null;
        JarFile jarFile = new JarFile(file);
        JarEntry entry = jarFile.getJarEntry("org/apache/harmony/archive/tests/internal/pack200/HelloWorld.class");
        assertNotNull(entry);

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    }


    public void testJustResources() throws Exception {
        in = Segment.class
                .getResourceAsStream("/org/apache/harmony/pack200/tests/JustResources.pack");
        Segment segment = Segment.parse(in);
        assertNotNull(segment);
        out = new JarOutputStream(new FileOutputStream(File.createTempFile("just", "resources.jar")));
        segment.writeJar(out);
    }

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    }


     public void testInterfaceOnly() throws Exception {
        in = Segment.class
                .getResourceAsStream("/org/apache/harmony/pack200/tests/InterfaceOnly.pack");
        Segment segment = Segment.parse(in);
        assertNotNull(segment);
        out = new JarOutputStream(new FileOutputStream(File.createTempFile("Interface", "Only.jar")));
        segment.writeJar(out);
    }

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    assertEquals("Zwei",layout.getValue(1, segment.getConstantPool()));
  }


    public void testLayoutRSN() throws Pack200Exception {
    AttributeLayout layout = new AttributeLayout("RSN",AttributeLayout.CONTEXT_CLASS,"RSN", 1);
    Segment segment = new TestSegment();
    assertNull(layout.getValue(0, segment.getConstantPool()));
    assertEquals("Eins",layout.getValue(1, segment.getConstantPool()));
    assertEquals("Zwei",layout.getValue(2, segment.getConstantPool()));
  }

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 */
public class SegmentConstantPoolTest extends TestCase {


    public class MockSegmentConstantPool extends SegmentConstantPool {
        public MockSegmentConstantPool() {
          super(new CpBands(new Segment()));
        };

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    assertTrue(throwsException("name",1234,""));
  }


  public void testLayoutRU() throws Pack200Exception {
    AttributeLayout layout = new AttributeLayout("RU",AttributeLayout.CONTEXT_CLASS,"RU", 1);
    Segment segment = new TestSegment();
    assertNull(layout.getValue(-1, segment.getConstantPool()));
    assertEquals("Zero",layout.getValue(0, segment.getConstantPool()));
    assertEquals("One",layout.getValue(1, segment.getConstantPool()));
  }

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    assertEquals("One",layout.getValue(1, segment.getConstantPool()));
  }


  public void testLayoutRUN() throws Pack200Exception {
    AttributeLayout layout = new AttributeLayout("RUN",AttributeLayout.CONTEXT_CLASS,"RUN", 1);
    Segment segment = new TestSegment();
    assertNull(layout.getValue(0, segment.getConstantPool()));
    assertEquals("Zero",layout.getValue(1, segment.getConstantPool()));
    assertEquals("One",layout.getValue(2, segment.getConstantPool()));
  }

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    assertEquals("One",layout.getValue(2, segment.getConstantPool()));
  }


  public void testLayoutRS() throws Pack200Exception {
    AttributeLayout layout = new AttributeLayout("RS",AttributeLayout.CONTEXT_CLASS,"RS", 1);
    Segment segment = new TestSegment();
    assertNull(layout.getValue(-1, segment.getConstantPool()));
    assertEquals("Eins",layout.getValue(0, segment.getConstantPool()));
    assertEquals("Zwei",layout.getValue(1, segment.getConstantPool()));
  }

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