Attributes whose type is a type variable are not handled correctly

[raner]

Example:

    static interface Quantity<VALUE extends Number>
    {
        VALUE value();
    }

    static interface RealQuantity extends Quantity<Double>
    {
    	// No additional methods
    }

    @Test
    public void testRealQuantityWithGenericType()
    {
    	Number fortyTwo = Double.valueOf(42D);
    	RealQuantity quantity = Projo.builder(RealQuantity.class).with(Quantity::value, fortyTwo).build();
        assertEquals(Double.valueOf(42D), quantity.value());
    }

    @Test
    public void testRealQuantityWithGenericTypeButSpecificValue()
    {
    	RealQuantity quantity = Projo.builder(RealQuantity.class).with(Quantity::value, Double.valueOf(42D)).build();
    	assertEquals(Double.valueOf(42D), quantity.value());
    }

    @Test
    public void testRealQuantityWithSpecificType()
    {
    	RealQuantity quantity = Projo.builder(RealQuantity.class).with(RealQuantity::value, Double.valueOf(42D)).build();
    	assertEquals(Double.valueOf(42D), quantity.value());
    }

The tests fail for both proxy-based implementation as well as for runtime code generation, though for slightly different reasons.

[raner]

Working theories:

• Missing cast when returning value from field (will have type bounds type, not actual type)
• Incorrect type for field (maybe it should be the actual type, not the bounds type)

[raner]

Released in Projo 1.5.6 and cherry-picked to master branch.