Examples of org.python.core.PyDataDescr

org.python.core.PyDataDescr
Implements type checking and return type coercion for a data descriptor. A subclass must at least implement invokeGet which is called in __get__ operations. If the descriptor supports setting and deleting, the subclass must also override invokeSet and invokeDel respectively. When implementing those methods, their respective implementsDescr* methods should be overriden as well.

        assertTrue(instance.implementsDescrSet());
        assertFalse(instance.implementsDescrDelete());
    }


    public void testFieldSetter() throws Exception {
        PyDataDescr instance = makeDescriptor(new DescSetup() {


            public void setup(DescriptorExposer de) {
                de.addFieldGetter("toStringVal", STRING);
                de.addFieldSetter("toStringVal", STRING);
            }
        });
        instance.__set__(se, Py.newString(NEW_VAL));
        assertEquals(NEW_VAL, se.toString());
        assertTrue(instance.implementsDescrSet());
        assertFalse(instance.implementsDescrDelete());
    }

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        assertTrue(instance.implementsDescrSet());
        assertFalse(instance.implementsDescrDelete());
    }


    public void testMethodDel() throws Exception {
        PyDataDescr instance = makeDescriptor(new DescSetup() {


            public void setup(DescriptorExposer de) {
                de.addMethodGetter("toString", RETURN_STRING_DESCRIPTOR);
                de.addMethodDeleter("deleteToString", "()V");
            }
        });
        instance.__delete__(se);
        assertNull(se.toString());
        assertTrue(instance.implementsDescrDelete());
    }

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                                                         ice.getBytecode());
        PyObject simp = (PyObject)doctoredSimple.newInstance();
        PyBuiltinCallable func = MethodExposerTest.instantiate(simple_method, "invisible");
        PyBuiltinCallable bound = func.bind(simp);
        bound.__call__();
        PyDataDescr desc = (PyDataDescr)tostringDesc.newInstance();
        desc.setType(simp.getType());
        assertEquals(doctoredSimple.getField("toStringVal").get(simp),
                     desc.__get__(simp, PyType.fromClass(doctoredSimple)).toString());
        assertEquals(desc.__getattr__("__doc__"), new PyString("tostring docs"));
    }

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Related Classes of org.python.core.PyDataDescr

org.python.expose.generate.DescriptorExposerTest

org.python.expose.generate.ExposedTypeProcessorTest

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