Examples of org.jruby.javasupport.util.ObjectProxyCache$Segment

org.apache.harmony.unpack200.Segment
Maps Java objects to their proxies. Combines elements of WeakHashMap and ConcurrentHashMap to permit unsynchronized reads. May be configured to use either Weak (the default) or Soft references.
Note that both Java objects and their proxies are held by weak/soft references; because proxies (currently) keep strong references to their Java objects, if we kept strong references to them the Java objects would never be gc'ed. This presents a problem in the case where a user passes a Rubified Java object out to Java but keeps no reference in Ruby to the proxy; if the object is returned to Ruby after its proxy has been gc'ed, a new (and possibly very wrong, in the case of JRuby-defined subclasses) proxy will be created. Use of soft references may help reduce the likelihood of this occurring; users may be advised to keep Ruby-side references to prevent it occurring altogether. @author Bill Dortch

    }


    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", ((CPUTF8)layout.getValue(1, segment.getConstantPool())).underlyingString());
        assertEquals("One", ((CPUTF8)layout.getValue(2, segment.getConstantPool())).underlyingString());
    }

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    }


    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", ((CPUTF8)layout.getValue(0, segment.getConstantPool())).underlyingString());
        assertEquals("Zwei", ((CPUTF8)layout.getValue(1, segment.getConstantPool())).underlyingString());
    }

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    }


    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", ((CPUTF8)layout.getValue(1, segment.getConstantPool())).underlyingString());
        assertEquals("Zwei", ((CPUTF8)layout.getValue(2, segment.getConstantPool())).underlyingString());
    }

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        pool
                .add(new CPUTF8("OtherThing",
                        ClassConstantPool.DOMAIN_NORMALASCIIZ, 1));
        CPUTF8 u1 = new CPUTF8("thing", ClassConstantPool.DOMAIN_NORMALASCIIZ, 2);
        pool.add(u1);
        pool.resolve(new Segment());
        assertTrue(pool.indexOf(u1) > 0);
    }

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    public void testIndex() {
        pool.add(new CPUTF8("OtherThing", 1));
        CPUTF8 u1 = new CPUTF8("thing", 2);
        pool.add(u1);
        pool.resolve(new Segment());
        assertTrue(pool.indexOf(u1) > 0);
    }

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

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

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

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