Examples of org.apache.tapestry.ioc.services.MethodSignature

Package org.apache.tapestry.ioc.services

Examples of org.apache.tapestry.ioc.services.MethodSignature

org.apache.tapestry.ioc.services.MethodSignature
A representation of a {@link java.lang.reflect.Method}, identifying the name, return type, parameter types and exception types. Actual Method objects are tied to a particular class, and don't compare well with other otherwise identical Methods from other classes or interface; MethodSignatures are distinct from classes and compare well.
Because the intended purpose is to compare methods from interfaces (which are always public and abstract) we don't bother to actually track the modifiers. In addition, at this time, MethodSignature does not distinguish between instance and static methods.
This version of MethodSignature works with loaded classes, and it usually used in the context of {@link org.apache.tapestry.ioc.services.ClassFab} to create new classes andsubclasses.

    {
        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();

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        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();

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        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];

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


        cf.addInterface(SimpleService.class);


        cf.addMethod(Modifier.PUBLIC, new MethodSignature(int.class, "add", new Class[]
        { int.class, int.class }, null), "return $1 + $2;");


        Class targetClass = cf.createClass();


        SimpleService s = (SimpleService) targetClass.newInstance();

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        try
        {
            cf.addMethod(
                    Modifier.PUBLIC,
                    new MethodSignature(void.class, "run", null, null),
                    "fail;");
        }
        catch (RuntimeException ex)
        {
            assertExceptionSubstring(ex, "Unable to add method void run() to class BadMethodBody:");

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    @Test
    public void add_duplicate_method_signature() throws Exception
    {
        ClassFab cf = newClassFab("DupeMethodAdd", Object.class);


        cf.addMethod(Modifier.PUBLIC, new MethodSignature(void.class, "foo", null, null), "{}");


        try
        {
            cf.addMethod(Modifier.PUBLIC, new MethodSignature(void.class, "foo", null, null), "{}");
            unreachable();
        }
        catch (RuntimeException ex)
        {
            assertEquals("Attempt to redefine method void foo() of class DupeMethodAdd.", ex

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        cf.addConstructor(new Class[]
        { Map.class, Runnable.class }, new Class[]
        { IllegalArgumentException.class, DataFormatException.class }, "{ _map = $1; }");


        MethodSignature sig = new MethodSignature(Map.class, "doTheNasty", new Class[]
        { int.class, String.class }, new Class[]
        { InstantiationException.class, IllegalAccessException.class });


        cf.addMethod(
                Modifier.PUBLIC + Modifier.FINAL + Modifier.SYNCHRONIZED,

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    public void add_noop_method() throws Exception
    {
        ClassFab cf = newClassFab("NoOp", Object.class);
        cf.addInterface(Runnable.class);


        cf.addNoOpMethod(new MethodSignature(void.class, "run", null, null));
        cf.addNoOpMethod(new MethodSignature(int.class, "getInt", null, null));
        cf.addNoOpMethod(new MethodSignature(double.class, "getDouble", null, null));


        Class clazz = cf.createClass();


        Runnable instance = (Runnable) clazz.newInstance();

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        cf.addConstructor(new Class[]
        { sourceClass }, null, "_source = $1;");


        String body = format("return _source.%s();", adapter.getReadMethod().getName());


        MethodSignature sig = new MethodSignature(propertyType, "_delegate", null, null);
        cf.addMethod(Modifier.PRIVATE, sig, body);


        String toString = format("<Shadow: property %s of %s>", propertyName, source);


        cf.proxyMethodsToDelegate(propertyType, "_delegate()", toString);

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        MethodIterator mi = new MethodIterator(serviceInterface);


        while (mi.hasNext())
        {
            MethodSignature sig = mi.next();


            // ($r) properly handles void methods for us, which keeps this simple.


            String body = format("return ($r) %s.%s($$);", delegateExpression, sig.getName());


            addMethod(Modifier.PUBLIC, sig, body);
        }


        if (!mi.getToString())

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org.apache.tapestry.ioc.internal.services.ChainBuilderImpl

org.apache.tapestry.ioc.internal.services.ClassFabImpl

org.apache.tapestry.ioc.internal.services.ClassFabImplTest

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