Examples of java.beans.Encoder$DefaultExceptionListener

java.beans.Encoder
The Encoder, together with PersistenceDelegate s, can encode an object into a series of java statements. By executing these statements, a new object can be created and it will has the same state as the original object which has been passed to the encoder. Here "has the same state" means the two objects are indistinguishable from their public API.
The Encoder and PersistenceDelegate s do this by creating copies of the input object and all objects it references. The copy process continues recursively util every object in the object graph has its new copy and the new version has the same state as the old version. All statements used to create those new objects and executed on them during the process form the result of encoding.

        // TBD
    }


    public void testInstantiate_Normal() throws Exception {
        Object obj = new int[] { 1, 2, 3 };
        Expression exp = pd.instantiate(obj, new Encoder());
        assertSame(obj, exp.getValue());
        assertSame(Array.class, exp.getTarget());
        assertEquals("newInstance", exp.getMethodName());
        assertEquals(2, exp.getArguments().length);
        assertSame(Integer.TYPE, exp.getArguments()[0]);

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     * Test instantiate() with null instance.
     */
    public void testInstantiate_NullInstance() throws Exception {
        MockPersistenceDelegate pd = new MockPersistenceDelegate(new String[] {
                "prop1", "prop2" });
        Encoder enc = new Encoder();
        try {
            pd.instantiate(null, enc);
            fail("Should throw NullPointerException!");
        } catch (NullPointerException ex) {
            // expected

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    public void testInstantiate_NullProperty() throws Exception {
        MockPersistenceDelegate pd = new MockPersistenceDelegate(new String[] {
                "prop1", null });
        MockBean b = new MockBean();
        b.setAll("bean1", 2);
        pd.instantiate(b, new Encoder());
        
        pd = new MockPersistenceDelegate(new String[] {
                "prop1", null, "prop2"});
        MockBean b2 = new MockBean();
        b2.setAll("bean1", 2);
        pd.instantiate(b2, new Encoder());
    }

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     */
    public void testInstantiate_NoProperty() throws Exception {
        MockPersistenceDelegate pd = new MockPersistenceDelegate();
        MockBean b = new MockBean();
        b.setAll("bean1", 2);
        Expression e = pd.instantiate(b, new Encoder());
        assertSame(b, e.getValue());
        assertSame(MockBean.class, e.getTarget());
        assertEquals("new", e.getMethodName());
        assertEquals(0, e.getArguments().length);
    }

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    public void testInstantiate_NonExistingGetter() throws Exception {
        MockPersistenceDelegate pd = new MockPersistenceDelegate(new String[] {
                "prop1", "non_existing" });
        MockBean b = new MockBean();
        b.setAll("bean1", 2);
        Encoder enc = new Encoder();
        ExceptionListener el = new ExceptionListener() {
            public void exceptionThrown(Exception e) {
                CallVerificationStack.getInstance().push(e);
            }
        };
        enc.setExceptionListener(el);
        Expression e = pd.instantiate(b, enc);
        assertSame(b, e.getValue());
        assertSame(MockBean.class, e.getTarget());
        assertEquals("new", e.getMethodName());
        assertEquals(2, e.getArguments().length);
        assertSame(b.getProp1(), e.getArguments()[0]);
        assertSame(null, e.getArguments()[1]);
        assertTrue(CallVerificationStack.getInstance().pop() instanceof Exception);


        enc.setExceptionListener(null);
        assertNotNull(enc.getExceptionListener());
        e = pd.instantiate(b, enc);
        assertSame(b, e.getValue());
        assertSame(MockBean.class, e.getTarget());
        assertEquals("new", e.getMethodName());
        assertEquals(2, e.getArguments().length);

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    public void testInstantiate_InvalidGetter() throws Exception {
        MockPersistenceDelegate pd = new MockPersistenceDelegate(new String[] {
                "prop1", "prop4" });
        MockBean b = new MockBean();
        b.setAll("bean1", 2);
        Expression e = pd.instantiate(b, new Encoder());
        assertSame(b, e.getValue());
        assertSame(MockBean.class, e.getTarget());
        assertEquals("new", e.getMethodName());
        assertEquals(2, e.getArguments().length);
        assertSame(b.getProp1(), e.getArguments()[0]);

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    public void testInstantiate_ExceptionalGetter() throws Exception {
        MockPersistenceDelegate pd = new MockPersistenceDelegate(new String[] {
                "prop1", "prop5" });
        MockBean b = new MockBean();
        b.setAll("bean1", 2);
        Expression e = pd.instantiate(b, new Encoder());
        assertSame(b, e.getValue());
        assertSame(MockBean.class, e.getTarget());
        assertEquals("new", e.getMethodName());
        assertEquals(2, e.getArguments().length);
        assertSame(b.getProp1(), e.getArguments()[0]);

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    public void testInstantiate_ErrorGetter() throws Exception {
        MockPersistenceDelegate pd = new MockPersistenceDelegate(new String[] {
                "prop1", "prop7" });
        MockBean b = new MockBean();
        b.setAll("bean1", 2);
        Expression e = pd.instantiate(b, new Encoder());
        assertSame(b, e.getValue());
        assertSame(MockBean.class, e.getTarget());
        assertEquals("new", e.getMethodName());
        assertEquals(2, e.getArguments().length);
        assertSame(b.getProp1(), e.getArguments()[0]);

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    public void testInstantiate_PrivateGetter() throws Exception {
        MockPersistenceDelegate pd = new MockPersistenceDelegate(new String[] {
                "prop1", "prop6" });
        MockBean b = new MockBean();
        b.setAll("bean1", 2);
        Expression e = pd.instantiate(b, new Encoder());
        assertSame(b, e.getValue());
        assertSame(MockBean.class, e.getTarget());
        assertEquals("new", e.getMethodName());
        assertEquals(2, e.getArguments().length);
        assertSame(b.getProp1(), e.getArguments()[0]);

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    public void testInstantiate_InitialUpperCasePropName() throws Exception {
        String[] props = new String[] { "Prop1", "prop2" };
        MockPersistenceDelegate pd = new MockPersistenceDelegate(props);
        MockBean b = new MockBean();
        b.setAll("bean1", 2);
        Expression e = pd.instantiate(b, new Encoder());
        assertSame(b, e.getValue());
        assertSame(MockBean.class, e.getTarget());
        assertEquals("new", e.getMethodName());
        assertEquals(2, e.getArguments().length);
        assertSame(b.getProp1(), e.getArguments()[0]);

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Test4950122

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