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Verify that Proxy instances have access to annotations' default values

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For quick access, the sezpoz library stores lists in
META-INF/annotations/ of classes that have been annotated in a
special way.

To support the use case where the annotations actually changed since
sezpoz stored said lists, sezpoz then creates proxy instances for the
annotations to provide some backwards compatibility: as long as there
are default values for any newly-introduced annotation values,
everything is groovy.

Therefore, let's make sure that proxy instances inherit the
annotations' default values.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This commit is contained in:
Johannes Schindelin 2013-11-08 14:52:08 -06:00
parent 0a179355f4
commit 6c57bd9174
2 changed files with 16 additions and 1 deletions
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15
test/Annotations.java
View File

@ -1,4 +1,6 @@
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method; import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import avian.testing.annotations.Color; import avian.testing.annotations.Color;
import avian.testing.annotations.Test; import avian.testing.annotations.Test;
@ -27,6 +29,7 @@ public class Annotations {
Method noAnno = Annotations.class.getMethod("noAnnotation"); Method noAnno = Annotations.class.getMethod("noAnnotation");
expect(noAnno.getAnnotation(Test.class) == null); expect(noAnno.getAnnotation(Test.class) == null);
expect(noAnno.getAnnotations().length == 0); expect(noAnno.getAnnotations().length == 0);
testProxyDefaultValue();
} }
@Test("couscous") @Test("couscous")
@ -39,4 +42,16 @@ public class Annotations {
public static void noAnnotation() { public static void noAnnotation() {
} }
private static void testProxyDefaultValue() {
ClassLoader loader = Annotations.class.getClassLoader();
InvocationHandler handler = new InvocationHandler() {
public Object invoke(Object proxy, Method method, Object... args) {
return method.getDefaultValue();
}
};
Test test = (Test)
Proxy.newProxyInstance(loader, new Class[] { Test.class }, handler);
expect("Hello, world!".equals(test.value()));
}
} }

2
test/avian/testing/annotations/Test.java
View File

@ -5,5 +5,5 @@ import java.lang.annotation.RetentionPolicy;
@Retention(RetentionPolicy.RUNTIME) @Retention(RetentionPolicy.RUNTIME)
public @interface Test { public @interface Test {
public String value(); public String value() default "Hello, world!";
} }