Examples of org.apache.hivemind.service.MethodFab

org.apache.hivemind.service.MethodFab
Represents a created method on a class; used to add catch handlers. @see org.apache.hivemind.service.ClassFab#addMethod(int,MethodSignature,String)

    public void testGetMethodFab() throws Exception
    {
        ClassFab cf = newClassFab("GetMethodFab", Object.class);


        MethodSignature s = new MethodSignature(void.class, "run", null, null);
        MethodFab mf = cf.addMethod(Modifier.PUBLIC, s, null);


        assertSame(mf, cf.getMethodFab(s));


        assertNull(cf.getMethodFab(new MethodSignature(void.class, "skip", null, null)));
    }

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    public void testExtendMethod() throws Exception
    {
        ClassFab cf = newClassFab("ExtendMethod", Object.class);


        MethodFab mf =
            cf.addMethod(
                Modifier.PUBLIC,
                new MethodSignature(int.class, "getValue", null, null),
                "return 1;");


        mf.extend("return 2 * $_;", false);


        Object bean = cf.createClass().newInstance();


        assertEquals(new Integer(2), PropertyUtils.read(bean, "value"));
    }

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    public void testExtendMethodAlterReturn() throws Exception
    {
        ClassFab cf = newClassFab("ExtendMethodAlterReturn", Object.class);


        MethodFab mf =
            cf.addMethod(
                Modifier.PUBLIC,
                new MethodSignature(int.class, "getValue", null, null),
                "return 2;");


        mf.extend("$_ = 3 * $_;", false);


        Object bean = cf.createClass().newInstance();


        assertEquals(new Integer(6), PropertyUtils.read(bean, "value"));
    }

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    public void testExtendMethodFailure() throws Exception
    {
        ClassFab cf = newClassFab("ExtendMethodFailure", Object.class);


        MethodFab mf =
            cf.addMethod(
                Modifier.PUBLIC,
                new MethodSignature(int.class, "getValue", null, null),
                "return 1;");


        try
        {
            mf.extend("$_ =", true);
            unreachable();
        }
        catch (ApplicationRuntimeException ex)
        {
            assertExceptionSubstring(

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    {
        ClassFab cf = newClassFab("Fail", Object.class);


        cf.addInterface(FailService.class);


        MethodFab mf =
            cf.addMethod(
                Modifier.PUBLIC,
                new MethodSignature(void.class, "fail", null, null),
                "throw new java.lang.RuntimeException(\"Ouch!\");");


        mf.addCatch(RuntimeException.class, "throw new java.io.IOException($e.getMessage());");


        Class targetClass = cf.createClass();


        FailService fs = (FailService) targetClass.newInstance();

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    {
        ClassFab cf = newClassFab("BadCatch", Object.class);


        cf.addInterface(Runnable.class);


        MethodFab mf =
            cf.addMethod(
                Modifier.PUBLIC,
                new MethodSignature(void.class, "run", null, null),
                "return;");


        try
        {
            mf.addCatch(RuntimeException.class, "woops!");
            unreachable();
        }
        catch (ApplicationRuntimeException ex)
        {
            assertExceptionSubstring(

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            builder.addln("return result;");
        }


        builder.end();


        MethodFab methodFab = classFab.addMethod(Modifier.PUBLIC, sig, builder.toString());


        builder.clear();


        builder.begin();
        builder.add("org.apache.hivemind.service.impl.LoggingUtils.exception(_log, ");
        builder.addQuoted(methodName);
        builder.addln(", $e);");
        builder.addln("throw $e;");
        builder.end();


        String body = builder.toString();


        Class[] exceptions = sig.getExceptionTypes();


        int count = exceptions.length;


        for (int i = 0; i < count; i++)
        {
            methodFab.addCatch(exceptions[i], body);
        }


        // Catch and log any runtime exceptions, in addition to the
        // checked exceptions.


        methodFab.addCatch(RuntimeException.class, body);
    }

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    {
        Iterator i = _methods.values().iterator();
        while (i.hasNext())
        {


            MethodFab mf = (MethodFab) i.next();


            buffer.append("\n");
            buffer.append(mf);
            buffer.append("\n");
        }

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                    ex), ex);
        }


        // Return a MethodFab so the caller can add catches.


        MethodFab result = new MethodFabImpl(getSource(), ms, method, body);


        _methods.put(ms, result);


        return result;
    }

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    public void testGetMethodFab() throws Exception
    {
        ClassFab cf = newClassFab("GetMethodFab", Object.class);


        MethodSignature s = new MethodSignature(void.class, "run", null, null);
        MethodFab mf = cf.addMethod(Modifier.PUBLIC, s, null);


        assertSame(mf, cf.getMethodFab(s));


        assertNull(cf.getMethodFab(new MethodSignature(void.class, "skip", null, null)));
    }

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