Examples of org.apache.hivemind.service.ClassFab

org.apache.hivemind.service.ClassFab
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Method bodies look largely like Java. References to java classes must be fully qualified. Several special variables are used:
- $0 first parameter, equivalent to this in Java code (and can't be used when creating a static method)
- $1, $2, ... actual parameters to the method
- $args all the parameters as an Object[]
- $r the return type of the method, typically used as return ($r) .... $r is valid with method that return void. This also handles conversions between wrapper types and primitive types.
- $w conversion from primitive type to wrapper type, used as ($w) foo() where foo() returns a primitive type and a wrapper type is needed
@author Howard Lewis Ship

    {
        MockControl factoryControl = newControl(ClassFactory.class);
        ClassFactory factory = (ClassFactory) factoryControl.getMock();


        MockControl cfc = newControl(ClassFab.class);
        ClassFab cf = (ClassFab) cfc.getMock();


        MethodFab mf = (MethodFab) newMock(MethodFab.class);


        MockControl fpc = newControl(ServiceImplementationFactoryParameters.class);
        ServiceImplementationFactoryParameters fp = (ServiceImplementationFactoryParameters) fpc
                .getMock();


        fp.getServiceInterface();
        fpc.setReturnValue(ToStringStrategy.class);


        factory.newClass("NewClass", Object.class);
        factoryControl.setReturnValue(cf);


        cf.addInterface(ToStringStrategy.class);
        cf.addField("_registry", StrategyRegistry.class);


        cf.addConstructor(new Class[]
        { StrategyRegistry.class }, null, "_registry = $1;");
        cfc.setMatcher(new AggregateArgumentsMatcher(new ArrayMatcher()));


        cf
                .addMethod(
                        Modifier.PRIVATE,
                        new MethodSignature(ToStringStrategy.class, "_getStrategy", new Class[]
                        { Object.class }, null),
                        "return (org.apache.hivemind.lib.strategy.ToStringStrategy) _registry.getStrategy($1.getClass());");
        cfc.setReturnValue(mf);


        cf.addMethod(Modifier.PUBLIC, new MethodSignature(String.class, "toString", new Class[]
        { Object.class }, null), "return ($r) _getStrategy($1).toString($$);");
        cfc.setReturnValue(mf);


        fp.getServiceId();
        fpc.setReturnValue("foo.Bar");


        ClassFabUtils.addToStringMethod(cf, StrategyMessages.toString(
                "foo.Bar",
                ToStringStrategy.class));
        cfc.setReturnValue(mf);


        cf.createClass();
        cfc.setReturnValue(String.class);


        replayControls();


        StrategyFactory f = new StrategyFactory();

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        MockControl factoryControl = newControl(ClassFactory.class);
        ClassFactory factory = (ClassFactory) factoryControl.getMock();


        MockControl cfc = newControl(ClassFab.class);
        ClassFab cf = (ClassFab) cfc.getMock();


        MethodFab mf = (MethodFab) newMock(MethodFab.class);


        MockControl fpc = newControl(ServiceImplementationFactoryParameters.class);
        ServiceImplementationFactoryParameters fp = (ServiceImplementationFactoryParameters) fpc
                .getMock();


        ErrorLog log = (ErrorLog) newMock(ErrorLog.class);


        fp.getServiceInterface();
        fpc.setReturnValue(Runnable.class);


        factory.newClass("NewClass", Object.class);
        factoryControl.setReturnValue(cf);


        cf.addInterface(Runnable.class);
        cf.addField("_registry", StrategyRegistry.class);


        cf.addConstructor(new Class[]
        { StrategyRegistry.class }, null, "_registry = $1;");
        cfc.setMatcher(new AggregateArgumentsMatcher(new ArrayMatcher()));


        cf.addMethod(
                Modifier.PRIVATE,
                new MethodSignature(Runnable.class, "_getStrategy", new Class[]
                { Object.class }, null),
                "return (java.lang.Runnable) _registry.getStrategy($1.getClass());");
        cfc.setReturnValue(mf);


        MethodSignature sig = new MethodSignature(void.class, "run", null, null);


        cf.addMethod(Modifier.PUBLIC, sig, "{  }");
        cfc.setReturnValue(mf);


        fp.getErrorLog();
        fpc.setReturnValue(log);


        fp.getFirstParameter();
        // Slight fudge: we return the location itself when we should return
        // an object with this location.
        fpc.setReturnValue(l);


        log.error(StrategyMessages.improperServiceMethod(sig), l, null);


        fp.getServiceId();
        fpc.setReturnValue("foo.Bar");


        ClassFabUtils.addToStringMethod(cf, StrategyMessages.toString("foo.Bar", Runnable.class));
        cfc.setReturnValue(mf);


        cf.createClass();


        cfc.setReturnValue(String.class);


        replayControls();

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    {
        MockControl factoryControl = newControl(ClassFactory.class);
        ClassFactory factory = (ClassFactory) factoryControl.getMock();


        MockControl cfc = newControl(ClassFab.class);
        ClassFab cf = (ClassFab) cfc.getMock();


        MethodFab mf = (MethodFab) newMock(MethodFab.class);


        MockControl fpc = newControl(ServiceImplementationFactoryParameters.class);
        ServiceImplementationFactoryParameters fp = (ServiceImplementationFactoryParameters) fpc
                .getMock();


        fp.getServiceInterface();
        fpc.setReturnValue(ToStringStrategy.class);


        factory.newClass("NewClass", Object.class);
        factoryControl.setReturnValue(cf);


        cf.addInterface(ToStringStrategy.class);
        cf.addField("_registry", StrategyRegistry.class);


        cf.addConstructor(new Class[]
        { StrategyRegistry.class }, null, "_registry = $1;");
        cfc.setMatcher(new AggregateArgumentsMatcher(new ArrayMatcher()));


        cf
                .addMethod(
                        Modifier.PRIVATE,
                        new MethodSignature(ToStringStrategy.class, "_getStrategy", new Class[]
                        { Object.class }, null),
                        "return (org.apache.hivemind.lib.strategy.ToStringStrategy) _registry.getStrategy($1.getClass());");
        cfc.setReturnValue(mf);


        cf.addMethod(Modifier.PUBLIC, new MethodSignature(String.class, "toString", new Class[]
        { Object.class }, null), "return ($r) _getStrategy($1).toString($$);");
        cfc.setReturnValue(mf);


        fp.getServiceId();
        fpc.setReturnValue("foo.Bar");


        ClassFabUtils.addToStringMethod(cf, StrategyMessages.toString(
                "foo.Bar",
                ToStringStrategy.class));
        cfc.setReturnValue(mf);


        cf.createClass();
        cfc.setReturnValue(String.class);


        replayControls();


        StrategyFactory f = new StrategyFactory();

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        MockControl factoryControl = newControl(ClassFactory.class);
        ClassFactory factory = (ClassFactory) factoryControl.getMock();


        MockControl cfc = newControl(ClassFab.class);
        ClassFab cf = (ClassFab) cfc.getMock();


        MethodFab mf = (MethodFab) newMock(MethodFab.class);


        MockControl fpc = newControl(ServiceImplementationFactoryParameters.class);
        ServiceImplementationFactoryParameters fp = (ServiceImplementationFactoryParameters) fpc
                .getMock();


        ErrorLog log = (ErrorLog) newMock(ErrorLog.class);


        fp.getServiceInterface();
        fpc.setReturnValue(Runnable.class);


        factory.newClass("NewClass", Object.class);
        factoryControl.setReturnValue(cf);


        cf.addInterface(Runnable.class);
        cf.addField("_registry", StrategyRegistry.class);


        cf.addConstructor(new Class[]
        { StrategyRegistry.class }, null, "_registry = $1;");
        cfc.setMatcher(new AggregateArgumentsMatcher(new ArrayMatcher()));


        cf.addMethod(
                Modifier.PRIVATE,
                new MethodSignature(Runnable.class, "_getStrategy", new Class[]
                { Object.class }, null),
                "return (java.lang.Runnable) _registry.getStrategy($1.getClass());");
        cfc.setReturnValue(mf);


        MethodSignature sig = new MethodSignature(void.class, "run", null, null);


        cf.addMethod(Modifier.PUBLIC, sig, "{  }");
        cfc.setReturnValue(mf);


        fp.getErrorLog();
        fpc.setReturnValue(log);


        fp.getFirstParameter();
        // Slight fudge: we return the location itself when we should return
        // an object with this location.
        fpc.setReturnValue(l);


        log.error(StrategyMessages.improperServiceMethod(sig), l, null);


        fp.getServiceId();
        fpc.setReturnValue("foo.Bar");


        ClassFabUtils.addToStringMethod(cf, StrategyMessages.toString("foo.Bar", Runnable.class));
        cfc.setReturnValue(mf);


        cf.createClass();


        cfc.setReturnValue(String.class);


        replayControls();

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     * Tests adding a void method, also tests creation of a toString() method.
     */
    public void testAddVoidMethod()
    {
        MockControl cfc = newControl(ClassFab.class);
        ClassFab cf = (ClassFab) cfc.getMock();


        MethodSignature sig = new MethodSignature(void.class, "run", null, null);


        BodyBuilder builder = new BodyBuilder();
        builder.begin();
        builder.addln("for (int i = 0; i < _commands.length; i++)");
        builder.addln("_commands[i].run($$);");
        builder.end();


        cf.addMethod(Modifier.PUBLIC, sig, builder.toString());
        cfc.setReturnValue(newMethodFab());


        replayControls();


        ChainBuilderImpl cb = new ChainBuilderImpl();

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    }


    public void testAddNonVoidMethod()
    {
        MockControl cfc = newControl(ClassFab.class);
        ClassFab cf = (ClassFab) cfc.getMock();


        MethodSignature sig = new MethodSignature(boolean.class, "execute", new Class[]
        { String.class }, null);


        BodyBuilder builder = new BodyBuilder();
        builder.begin();
        builder.addln("boolean result = false;");
        builder.addln("for (int i = 0; i < _commands.length; i++)");
        builder.begin();
        builder.addln("result = _commands[i].execute($$);");
        builder.addln("if (result != false) break;");
        builder.end();
        builder.addln("return result;");
        builder.end();


        cf.addMethod(Modifier.PUBLIC, sig, builder.toString());
        cfc.setReturnValue(newMethodFab());


        replayControls();


        ChainBuilderImpl cb = new ChainBuilderImpl();

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        return new ClassFabImpl(_source, ctClass);
    }


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


        cf.addField("_stringValue", String.class);


        MethodSignature setStringValue = new MethodSignature(void.class, "setStringValue",
                new Class[]
                { String.class }, null);


        cf.addMethod(Modifier.PUBLIC, setStringValue, "_stringValue = $1;");


        MethodSignature getStringValue = new MethodSignature(String.class, "getStringValue", null,
                null);


        cf.addMethod(Modifier.PUBLIC, getStringValue, "return _stringValue;");


        Class targetClass = cf.createClass();


        Object targetBean = targetClass.newInstance();


        PropertyUtils.write(targetBean, "stringValue", "Fred");

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        assertEquals("Fred", actual);
    }


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


        cf.addField("_stringValue", String.class);
        cf.addConstructor(new Class[]
        { String.class }, null, "{ _stringValue = $1; }");


        MethodSignature getStringValue = new MethodSignature(String.class, "getStringValue", null,
                null);


        cf.addMethod(Modifier.PUBLIC, getStringValue, "return _stringValue;");


        Class targetClass = cf.createClass();


        try
        {
            targetClass.newInstance();
            unreachable();

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        assertEquals("Buffy", actual);
    }


    public void testConstructorFromBaseClass() throws Exception
    {
        ClassFab cf = newClassFab("MyIntHolder", AbstractIntWrapper.class);


        cf.addField("_intValue", int.class);
        cf.addConstructor(new Class[]
        { int.class }, null, "{ _intValue = $1; }");


        cf.addMethod(
                Modifier.PUBLIC,
                new MethodSignature(int.class, "getIntValue", null, null),
                "return _intValue;");


        Class targetClass = cf.createClass();
        Constructor c = targetClass.getConstructors()[0];


        AbstractIntWrapper targetBean = (AbstractIntWrapper) c.newInstance(new Object[]
        { new Integer(137) });

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        assertEquals(137, targetBean.getIntValue());
    }


    public void testInvalidSuperClass() throws Exception
    {
        ClassFab cf = newClassFab("InvalidSuperClass", List.class);


        try
        {
            cf.createClass();
            unreachable();
        }
        catch (ApplicationRuntimeException ex)
        {
            assertExceptionSubstring(ex, "Unable to create class InvalidSuperClass");

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