Examples of org.codehaus.groovy.runtime.metaclass.NewInstanceMetaMethod

Package org.codehaus.groovy.runtime.metaclass

Examples of org.codehaus.groovy.runtime.metaclass.NewInstanceMetaMethod

org.codehaus.groovy.runtime.metaclass.NewInstanceMetaMethod
A MetaMethod implementation where the underlying method is really a static helper method on some class but it appears to be an instance method on a class. This implementation is used to add new methods to the JDK writing them as normal static methods with the first parameter being the class on which the method is added. @author James Strachan @version $Revision: 8959 $


    public void testInvokeMetaMethod() throws Exception {
        Method method = getClass().getMethod("dummyMethod", new Class[]{String.class, String.class});
        assertTrue("Should have found a method", method != null);


        NewInstanceMetaMethod metaMethod = createNewMetaMethod(method);


        Object answer = metaMethod.invoke("abc", new Object[]{"xyz"});
        assertEquals("def", answer);


        assertTrue("Should not appear as static method", !metaMethod.isStatic());
    }

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    public void testInvokeDefaultGroovyMethod() throws Exception {
        Method method = DefaultGroovyMethods.class.getMethod("plus", new Class[]{String.class, Object.class});
        assertTrue("Should have found a method", method != null);


        NewInstanceMetaMethod metaMethod = createNewMetaMethod(method);


        Object answer = metaMethod.invoke("abc", new Object[]{"123"});
        assertEquals("abc123", answer);


        System.out.println("Found: " + answer);
    }

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        assertEquals("xyz", bar);
        return "def";
    }


    protected NewInstanceMetaMethod createNewMetaMethod(Method method) {
        return new NewInstanceMetaMethod(CachedMethod.find(method));
    }

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        return false;  // MetaClassImpl not designed for modification, just return false
    }


    public void addNewInstanceMethod(Method method) {
        final CachedMethod cachedMethod = CachedMethod.find(method);
        NewInstanceMetaMethod newMethod = new NewInstanceMetaMethod(cachedMethod);
        final CachedClass declaringClass = newMethod.getDeclaringClass();
        addNewInstanceMethodToIndex(newMethod, metaMethodIndex.getHeader(declaringClass.getTheClass()));
    }

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        CachedClass[] paramTypes = method.getParameterTypes();


        if (paramTypes.length == 0)
            return;


        NewInstanceMetaMethod metaMethod;
        if (paramTypes[0].isAssignableFrom(self.getTheClass())) {
            if (paramTypes[0].getTheClass() == self.getTheClass())
                metaMethod = new NewInstanceMetaMethod(method);
            else
                metaMethod = new NewInstanceMetaMethod(method) {
                    public CachedClass getDeclaringClass() {
                        return ReflectionCache.getCachedClass(self.getTheClass());
                    }
                };
            arr.add(metaMethod);
        } else {
            if (self.getTheClass().isAssignableFrom(paramTypes[0].getTheClass())) {
                metaMethod = new NewInstanceMetaMethod(method);
                arr.add(metaMethod);
            }
        }
    }

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        return false;  // MetaClassImpl not designed for modification, just return false
    }


    public void addNewInstanceMethod(Method method) {
        final CachedMethod cachedMethod = CachedMethod.find(method);
        NewInstanceMetaMethod newMethod = new NewInstanceMetaMethod(cachedMethod);
        final CachedClass declaringClass = newMethod.getDeclaringClass();
        addNewInstanceMethodToIndex(newMethod, metaMethodIndex.getHeader(declaringClass.getTheClass()));
    }

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    public void testInvokeMetaMethod() throws Exception {
        Method method = getClass().getMethod("dummyMethod", new Class[]{String.class, String.class});
        assertTrue("Should have found a method", method != null);


        NewInstanceMetaMethod metaMethod = createNewMetaMethod(method);


        Object answer = metaMethod.invoke("abc", new Object[]{"xyz"});
        assertEquals("def", answer);


        assertTrue("Should not appear as static method", !metaMethod.isStatic());
    }

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    public void testInvokeDefaultGroovyMethod() throws Exception {
        Method method = DefaultGroovyMethods.class.getMethod("plus", new Class[]{String.class, Object.class});
        assertTrue("Should have found a method", method != null);


        NewInstanceMetaMethod metaMethod = createNewMetaMethod(method);


        Object answer = metaMethod.invoke("abc", new Object[]{"123"});
        assertEquals("abc123", answer);


        System.out.println("Found: " + answer);
    }

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        assertEquals("xyz", bar);
        return "def";
    }


    protected NewInstanceMetaMethod createNewMetaMethod(Method method) {
        return new NewInstanceMetaMethod(CachedMethod.find(method));
    }

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        CachedClass cachedClass = ReflectionCache.getCachedClass(extensionClass);
        CachedMethod[] methods = cachedClass.getMethods();
        for (CachedMethod method : methods) {
            if (method.isStatic() && method.isPublic() && method.getParamsCount() > 0) {
                // an extension method is found
                metaMethods.add(isStatic?new NewStaticMetaMethod(method) : new NewInstanceMetaMethod(method));
            }
        }
    }

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org.codehaus.groovy.reflection.MixinInMetaClass

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org.codehaus.groovy.runtime.NewStaticMetaMethodTest

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