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Implement Field#getGenericType()

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Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
This commit is contained in:
Johannes Schindelin
2013-12-03 14:08:21 -06:00
parent 0eb2d55da2
commit 2d83622975
4 changed files with 200 additions and 3 deletions
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43
test/Reflection.java
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@ -1,5 +1,7 @@
import java.lang.reflect.Method;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
public class Reflection {
public static boolean booleanMethod() {
@ -38,8 +40,8 @@ public class Reflection {
if (! v) throw new RuntimeException();
}
private static class Hello {
private class World { }
private static class Hello<T> {
private class World<S> { }
}
private static void innerClasses() throws Exception {
@ -56,9 +58,44 @@ public class Reflection {
expect(egads.getAnnotation(Deprecated.class) == null);
}
public static Hello<Hello<Reflection>>.World<Hello<String>> pinky;
private static void genericType() throws Exception {
Field field = Reflection.class.getDeclaredField("egads");
expect(field.getGenericType() == Integer.TYPE);
field = Reflection.class.getField("pinky");
expect("Reflection$Hello$World".equals(field.getType().getName()));
expect(field.getGenericType() instanceof ParameterizedType);
ParameterizedType type = (ParameterizedType) field.getGenericType();
expect(type.getRawType() instanceof Class);
Class<?> clazz = (Class<?>) type.getRawType();
expect("Reflection$Hello$World".equals(clazz.getName()));
expect(type.getOwnerType() instanceof ParameterizedType);
ParameterizedType owner = (ParameterizedType) type.getOwnerType();
clazz = (Class<?>) owner.getRawType();
expect(clazz == Hello.class);
Type[] args = type.getActualTypeArguments();
expect(1 == args.length);
expect(args[0] instanceof ParameterizedType);
ParameterizedType arg = (ParameterizedType) args[0];
expect(arg.getRawType() instanceof Class);
clazz = (Class<?>) arg.getRawType();
expect("Reflection$Hello".equals(clazz.getName()));
args = arg.getActualTypeArguments();
expect(1 == args.length);
expect(args[0] == String.class);
}
public static void main(String[] args) throws Exception {
innerClasses();
annotations();
genericType();
Class system = Class.forName("java.lang.System");
Field out = system.getDeclaredField("out");