Attachment 249627 Details for Bug 455852 – Another example

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Another example

Test.java (text/x-java), 1.49 KB, created by Luke Hutchison

on 2014-12-26 03:06:25 EST

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Creator: Luke Hutchison

Created: 2014-12-26 03:06:25 EST

Size: 1.49 KB

patch

obsolete

>import java.lang.annotation.Annotation;
>import java.lang.annotation.ElementType;
>import java.lang.annotation.Retention;
>import java.lang.annotation.RetentionPolicy;
>import java.lang.annotation.Target;
>import java.lang.reflect.Field;
>
>public class Test {
>
>    @Retention(RetentionPolicy.RUNTIME)
>    @Target(ElementType.FIELD)
>    public static @interface Required {
>    }
>
>    public static class X {
>        @Required
>        String id;
>
>        int index;
>    }
>
>    public static void test(Class<? extends X> klass) {
>        for (Field field : klass.getFields()) {
>            if (field.isAccessible()) {
>                for (Annotation annotation : field.getAnnotations()) {
>                    Class<?> fieldType = field.getType();
>                    // ----------------------------------------------------------------------max wrap width: 120-------|
>                    if (annotation.annotationType() == Required.class
>                            && (fieldType == Integer.TYPE || fieldType == Long.TYPE || fieldType == Short.TYPE
>                                    || fieldType == Character.TYPE || fieldType == Byte.TYPE || fieldType == Float.TYPE || fieldType == Double.TYPE)) {
>                        throw new RuntimeException("Field " + klass.getName() + "." + field.getName()
>                                + " has a Required annotation, but the field has a primitive type,"
>                                + " so it can never be null");
>                    }
>                }
>            }
>        }
>    }
>}
>

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Attachments on bug 455852: 249565 | 249627