Examples of org.apache.tapestry5.ioc.services.MethodSignature

Package org.apache.tapestry5.ioc.services

Examples of org.apache.tapestry5.ioc.services.MethodSignature

org.apache.tapestry5.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.tapestry5.ioc.services.ClassFab} to create new classes and subclasses. @deprecated In 5.3, to be removed in a later release


        classFab.addInterface(Serializable.class);


        // This is the "magic" signature that allows an object to substitute some other
        // object for itself.
        MethodSignature writeReplaceSig = new MethodSignature(Object.class, "writeReplace", null, new Class[]
        { ObjectStreamException.class });


        classFab.addMethod(Modifier.PRIVATE, writeReplaceSig, "return token;");


        // Now delegate all the methods.


        String body = format("return (%s) creator.createObject();", serviceInterface.getName());


        MethodSignature sig = new MethodSignature(serviceInterface, "delegate", null, null);


        classFab.addMethod(Modifier.PRIVATE, sig, body);


        classFab.proxyMethodsToDelegate(serviceInterface, "delegate()", description);

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        classFab.addField(CREATOR_FIELD, PRIVATE_FINAL, ObjectCreator.class);


        classFab.addConstructor(new Class[] { String.class, ObjectCreator.class }, null,
                                String.format("{ %s = $1; %s = $2; }", DESCRIPTION_FIELD, CREATOR_FIELD));


        MethodSignature sig = new MethodSignature(interfaceType, DELEGATE_METHOD, null, null);


        classFab.addMethod(Modifier.PRIVATE, sig, String.format("return ($r) %s.createObject();", CREATOR_FIELD));


        MethodIterator mi = new MethodIterator(interfaceType);


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


            classFab.addMethod(Modifier.PUBLIC, sig,
                               String.format("return ($r) %s().%s($$);", DELEGATE_METHOD, sig.getName()));
        }


        if (!mi.getToString())
            classFab.addMethod(Modifier.PUBLIC, toStringSignature, String.format("return %s;", DESCRIPTION_FIELD));

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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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    public void addToString(String toString)
    {
        lock.check();


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


        // TODO: Very simple quoting here, will break down if the string itself contains
        // double quotes or various other characters that need escaping.


        addMethod(Modifier.PUBLIC, sig, format("return \"%s\";", toString));

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    {
        for (Method m : remainingMethods)
        {
            sawToString |= ClassFabUtils.isToString(m);


            MethodSignature sig = new MethodSignature(m);


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


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

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        classFab.addConstructor(new Class[]
        { ObjectCreator.class }, null, "_creator = $1;");


        String body = format("return (%s) _creator.createObject();", proxyInterface.getName());


        MethodSignature sig = new MethodSignature(proxyInterface, "_delegate", null, null);


        classFab.addMethod(Modifier.PRIVATE, sig, body);
        
        classFab.proxyMethodsToDelegate(proxyInterface, "_delegate()", description);

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        int modifiers = Modifier.PUBLIC | AccessFlag.SYNTHETIC;


        // choose arbitrary signature


        MethodSignature signature = new MethodSignature(List.class.getMethod("size"));


        fab.addMethod(modifiers, signature, "return 0;");


        Class moduleClass = fab.createClass();

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    {
        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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        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();

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        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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