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72 lines
2.1 KiB
Java
72 lines
2.1 KiB
Java
import java.lang.annotation.Annotation;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Field;
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import java.lang.reflect.Method;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Iterator;
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import java.util.List;
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@Retention(RetentionPolicy.RUNTIME) @interface One {}
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@Retention(RetentionPolicy.RUNTIME) @interface Two {}
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@Retention(RetentionPolicy.RUNTIME) @interface Three {}
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@Retention(RetentionPolicy.RUNTIME) @interface Four {}
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@Retention(RetentionPolicy.RUNTIME) @interface Five {}
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@Retention(RetentionPolicy.RUNTIME) @interface Six {}
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class Target {
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public void m() {}
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public Target(int i) {}
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public int x;
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}
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aspect X {
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declare @method: * Target.*(..): @One;
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declare @method: * Target.*(..): @Two;
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declare @constructor: Target.new(int): @Three;
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declare @constructor: Target.new(int): @Four;
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declare @field: int Target.*: @Five;
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declare @field: int Target.*: @Six;
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}
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public class DecA {
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public static void main(String []argv) {
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// Let's do the method then the ctor, then the field
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try {
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Class c = Target.class;
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Method m = c.getDeclaredMethod("m",null);
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System.err.println("There are "+m.getAnnotations().length+" annotations on public void m():");
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dumpAnnos(m.getAnnotations());
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Constructor ctor = c.getDeclaredConstructor(new Class[]{Integer.TYPE});
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System.err.println("There are "+ctor.getAnnotations().length+" annotations on public Target(int):");
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dumpAnnos(ctor.getAnnotations());
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Field f = c.getDeclaredField("x");
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System.err.println("There are "+f.getAnnotations().length+" annotations on public int x:");
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dumpAnnos(f.getAnnotations());
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} catch (Exception e) { e.printStackTrace();}
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}
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public static void dumpAnnos(Annotation[] anns) {
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List l = new ArrayList();
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if (anns!=null) {
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for (int i = 0; i < anns.length; i++) {
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l.add(anns[i].annotationType().getName());
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}
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}
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Collections.sort(l);
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int i = 1;
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for (Iterator iter = l.iterator(); iter.hasNext();) {
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System.err.println((i++)+") "+iter.next());
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}
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}
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} |