jdk/test/javax/management/Introspector/AnnotationTest.java - platform/libcore - Git at Google

 /*
  * Copyright 2005-2008 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  */

 /*
  * @test
  * @bug 6221321 6295867
  * @summary Test that annotations in Standard MBean interfaces
  * correctly produce Descriptor entries
  * @author Eamonn McManus
  * @run clean AnnotationTest
  * @run build AnnotationTest
  * @run main AnnotationTest
  */

 import java.lang.annotation.*;
 import java.lang.reflect.*;
 import java.util.*;
 import javax.management.*;

 /*
   This test checks that annotations produce Descriptor entries as
   specified in javax.management.DescriptorKey and javax.management.DescriptorField.
   It does the following:

   - An annotation consisting of an int and a String, each with an
     appropriate @DescriptorKey annotation, is placed on every program
     element where it can map to a Descriptor, namely:

     . on an MBean interface
     . on a getter for a read-only attribute
     . on a setter for a write-only attribute
     . on the getter but not the setter for a read/write attribute
     . on the setter but not the getter for a read/write attribute
     . on both the getter and the setter for a read/write attribute
     . on an operation
     . on each parameter of an operation
     . on a public constructor with no parameters
     . on a public constructor with a parameter
     . on the parameter of that public constructor
     . on all of the above for an MXBean instead of an MBean

     The test checks that in each case the corresponding Descriptor
     appears in the appropriate place inside the MBean's MBeanInfo.

  - A @DescriptorFields annotation defining two fields is placed in the
    same places and again the test checks that the two fields appear
    in the corresponding MBean*Info objects.

   - An annotation consisting of enough other types to ensure coverage
     is placed on a getter.  The test checks that the generated
     MBeanAttributeInfo contains the corresponding Descriptor.  The tested
     types are the following:

     . Class
     . an enumeration type (java.lang.annotation.RetentionPolicy)
     . boolean
     . String[]
     . Class[]
     . int[]
     . an array of enumeration type (RetentionPolicy[])
     . boolean[]
  */
 public class AnnotationTest {
     private static String failed = null;

     @Retention(RetentionPolicy.RUNTIME)
     public static @interface Pair {
         @DescriptorKey("x")
         int x();
         @DescriptorKey("y")
         String y();
     }

     @Retention(RetentionPolicy.RUNTIME)
     public static @interface Full {
         @DescriptorKey("class")
         Class classValue();
         @DescriptorKey("enum")
         RetentionPolicy enumValue();
         @DescriptorKey("boolean")
         boolean booleanValue();
         @DescriptorKey("stringArray")
         String[] stringArrayValue();
         @DescriptorKey("classArray")
         Class[] classArrayValue();
         @DescriptorKey("intArray")
         int[] intArrayValue();
         @DescriptorKey("enumArray")
         RetentionPolicy[] enumArrayValue();
         @DescriptorKey("booleanArray")
         boolean[] booleanArrayValue();
     }

     /* We use the annotations @Pair(x = 3, y = "foo")
        and @DescriptorFields({"foo=bar", "baz="}) everywhere, and this is
        the Descriptor that they should produce: */
     private static Descriptor expectedDescriptor =
         new ImmutableDescriptor(new String[] {"x", "y", "foo", "baz"},
                                 new Object[] {3, "foo", "bar", ""});

     private static Descriptor expectedFullDescriptor =
         new ImmutableDescriptor(new String[] {
                                     "class", "enum", "boolean", "stringArray",
                                     "classArray", "intArray", "enumArray",
                                     "booleanArray",
                                 },
                                 new Object[] {
                                     Full.class.getName(),
                                     RetentionPolicy.RUNTIME.name(),
                                     false,
                                     new String[] {"foo", "bar"},
                                     new String[] {Full.class.getName()},
                                     new int[] {1, 2},
                                     new String[] {RetentionPolicy.RUNTIME.name()},
                                     new boolean[] {false, true},
                                 });

     @Pair(x = 3, y = "foo")
     @DescriptorFields({"foo=bar", "baz="})
     public static interface ThingMBean {
         @Pair(x = 3, y = "foo")
         @DescriptorFields({"foo=bar", "baz="})
         @Full(classValue=Full.class,
               enumValue=RetentionPolicy.RUNTIME,
               booleanValue=false,
               stringArrayValue={"foo", "bar"},
               classArrayValue={Full.class},
               intArrayValue={1, 2},
               enumArrayValue={RetentionPolicy.RUNTIME},
               booleanArrayValue={false, true})
         int getReadOnly();

         @Pair(x = 3, y = "foo")
         @DescriptorFields({"foo=bar", "baz="})
         void setWriteOnly(int x);

         @Pair(x = 3, y = "foo")
         @DescriptorFields({"foo=bar", "baz="})
         int getReadWrite1();
         void setReadWrite1(int x);

         @Pair(x = 3, y = "foo")
         @DescriptorFields({"foo=bar", "baz="})
         int getReadWrite2();
         @Pair(x = 3, y = "foo")
         @DescriptorFields({"foo=bar", "baz="})
         void setReadWrite2(int x);

         int getReadWrite3();
         @Pair(x = 3, y = "foo")
         @DescriptorFields({"foo=bar", "baz="})
         void setReadWrite3(int x);

         @Pair(x = 3, y = "foo")
         @DescriptorFields({"foo=bar", "baz="})
         int operation(@Pair(x = 3, y = "foo")
                       @DescriptorFields({"foo=bar", "baz="})
                       int p1,
                       @Pair(x = 3, y = "foo")
                       @DescriptorFields({"foo=bar", "baz="})
                       int p2);
     }

     public static class Thing implements ThingMBean {
         @Pair(x = 3, y = "foo")
         @DescriptorFields({"foo=bar", "baz="})
         public Thing() {}

         @Pair(x = 3, y = "foo")
         @DescriptorFields({"foo=bar", "baz="})
         public Thing(
                 @Pair(x = 3, y = "foo")
                 @DescriptorFields({"foo=bar", "baz="})
                 int p1) {}

         public int getReadOnly() {return 0;}

         public void setWriteOnly(int x) {}

         public int getReadWrite1() {return 0;}
         public void setReadWrite1(int x) {}

         public int getReadWrite2() {return 0;}
         public void setReadWrite2(int x) {}

         public int getReadWrite3() {return 0;}
         public void setReadWrite3(int x) {}

         public int operation(int p1, int p2) {return 0;}
     }

     @Pair(x = 3, y = "foo")
     @DescriptorFields({"foo=bar", "baz="})
     public static interface ThingMXBean extends ThingMBean {}

     public static class ThingImpl implements ThingMXBean {
         @Pair(x = 3, y = "foo")
         @DescriptorFields({"foo=bar", "baz="})
         public ThingImpl() {}

         @Pair(x = 3, y = "foo")
         @DescriptorFields({"foo=bar", "baz="})
         public ThingImpl(
                 @Pair(x = 3, y = "foo")
                 @DescriptorFields({"foo=bar", "baz="})
                 int p1) {}

         public int getReadOnly() {return 0;}

         public void setWriteOnly(int x) {}

         public int getReadWrite1() {return 0;}
         public void setReadWrite1(int x) {}

         public int getReadWrite2() {return 0;}
         public void setReadWrite2(int x) {}

         public int getReadWrite3() {return 0;}
         public void setReadWrite3(int x) {}

         public int operation(int p1, int p2) {return 0;}
     }

     @Retention(RetentionPolicy.RUNTIME)
     public static @interface DefaultTest {
         @DescriptorKey(value = "string1", omitIfDefault = true)
         String string1() default "";
         @DescriptorKey(value = "string2", omitIfDefault = true)
         String string2() default "tiddly pom";
         @DescriptorKey(value = "int", omitIfDefault = true)
         int intx() default 23;
         @DescriptorKey(value = "intarray1", omitIfDefault = true)
         int[] intArray1() default {};
         @DescriptorKey(value = "intarray2", omitIfDefault = true)
         int[] intArray2() default {1, 2};
         @DescriptorKey(value = "stringarray1", omitIfDefault = true)
         String[] stringArray1() default {};
         @DescriptorKey(value = "stringarray2", omitIfDefault = true)
         String[] stringArray2() default {"foo", "bar"};
     }

     @Retention(RetentionPolicy.RUNTIME)
     public static @interface Expect {
         String[] value() default {};
     }

     public static interface DefaultMBean {
         @DefaultTest
         @Expect()
         public void a();

         @DefaultTest(string1="")
         @Expect()
         public void b();

         @DefaultTest(string1="nondefault")
         @Expect("string1=nondefault")
         public void c();

         @DefaultTest(string2="tiddly pom")
         @Expect()
         public void d();

         @DefaultTest(intx=23)
         @Expect()
         public void e();

         @DefaultTest(intx=34)
         @Expect("int=34")
         public void f();

         @DefaultTest(intArray1={})
         @Expect()
         public void g();

         @DefaultTest(intArray1={2,3})
         @Expect("intarray1=[2, 3]")
         public void h();

         @DefaultTest(intArray2={})
         @Expect("intarray2=[]")
         public void i();

         @DefaultTest(stringArray1={})
         @Expect()
         public void j();

         @DefaultTest(stringArray1={"foo"})
         @Expect("stringarray1=[foo]")
         public void k();

         @DefaultTest(stringArray2={})
         @Expect("stringarray2=[]")
         public void l();
     }

     public static void main(String[] args) throws Exception {
         System.out.println("Testing that annotations are correctly " +
                            "reflected in Descriptor entries");

         MBeanServer mbs =
             java.lang.management.ManagementFactory.getPlatformMBeanServer();
         ObjectName on = new ObjectName("a:b=c");

         Thing thing = new Thing();
         mbs.registerMBean(thing, on);
         check(mbs, on);
         mbs.unregisterMBean(on);

         ThingImpl thingImpl = new ThingImpl();
         mbs.registerMBean(thingImpl, on);
         Descriptor d = mbs.getMBeanInfo(on).getDescriptor();
         if (!d.getFieldValue("mxbean").equals("true")) {
             System.out.println("NOT OK: expected MXBean");
             failed = "Expected MXBean";
         }
         check(mbs, on);

         System.out.println();
         System.out.println("Testing that omitIfDefault works");
         DefaultMBean defaultImpl = (DefaultMBean) Proxy.newProxyInstance(
                 DefaultMBean.class.getClassLoader(),
                 new Class<?>[] {DefaultMBean.class},
                 new InvocationHandler(){
                     public Object invoke(Object proxy, Method method, Object[] args) {
                         return null;
                     }
                 });
         DynamicMBean mbean = new StandardMBean(defaultImpl, DefaultMBean.class);
         MBeanOperationInfo[] ops = mbean.getMBeanInfo().getOperations();
         for (MBeanOperationInfo op : ops) {
             String name = op.getName();
             Expect expect =
                     DefaultMBean.class.getMethod(name).getAnnotation(Expect.class);
             Descriptor opd = op.getDescriptor();
             List<String> fields = new ArrayList<String>();
             for (String fieldName : opd.getFieldNames()) {
                 Object value = opd.getFieldValue(fieldName);
                 String s = Arrays.deepToString(new Object[] {value});
                 s = s.substring(1, s.length() - 1);
                 fields.add(fieldName + "=" + s);
             }
             Descriptor opds = new ImmutableDescriptor(fields.toArray(new String[0]));
             Descriptor expd = new ImmutableDescriptor(expect.value());
             if (opds.equals(expd))
                 System.out.println("OK: op " + name + ": " + opds);
             else {
                 String failure = "Bad descriptor for op " + name + ": " +
                         "expected " + expd + ", got " + opds;
                 System.out.println("NOT OK: " + failure);
                 failed = failure;
             }
         }
         System.out.println();

         if (failed == null)
             System.out.println("Test passed");
         else
             throw new Exception("TEST FAILED: " + failed);
     }

     private static void check(MBeanServer mbs, ObjectName on) throws Exception {
         MBeanInfo mbi = mbs.getMBeanInfo(on);

         // check the MBean itself
         check(mbi);

         // check attributes
         MBeanAttributeInfo[] attrs = mbi.getAttributes();
         for (MBeanAttributeInfo attr : attrs) {
             check(attr);
             if (attr.getName().equals("ReadOnly"))
                 check("@Full", attr.getDescriptor(), expectedFullDescriptor);
         }

         // check operations
         MBeanOperationInfo[] ops = mbi.getOperations();
         for (MBeanOperationInfo op : ops) {
             check(op);
             check(op.getSignature());
         }

         MBeanConstructorInfo[] constrs = mbi.getConstructors();
         for (MBeanConstructorInfo constr : constrs) {
             check(constr);
             check(constr.getSignature());
         }
     }

     private static void check(DescriptorRead x) {
         check(x, x.getDescriptor(), expectedDescriptor);
     }

     private static void check(Object x, Descriptor d, Descriptor expect) {
         String fail = null;
         try {
             Descriptor u = ImmutableDescriptor.union(d, expect);
             if (!u.equals(d))
                 fail = "should contain " + expect + "; is " + d;
         } catch (IllegalArgumentException e) {
             fail = e.getMessage();
         }
         if (fail == null) {
             System.out.println("OK: " + x);
         } else {
             failed = "NOT OK: Incorrect descriptor for: " + x;
             System.out.println(failed);
             System.out.println("..." + fail);
         }
     }

     private static void check(DescriptorRead[] xx) {
         for (DescriptorRead x : xx)
             check(x);
     }
 }
	/*
	* Copyright 2005-2008 Sun Microsystems, Inc. All Rights Reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
	* CA 95054 USA or visit www.sun.com if you need additional information or
	* have any questions.
	*/

	/*
	* @test
	* @bug 6221321 6295867
	* @summary Test that annotations in Standard MBean interfaces
	* correctly produce Descriptor entries
	* @author Eamonn McManus
	* @run clean AnnotationTest
	* @run build AnnotationTest
	* @run main AnnotationTest
	*/

	import java.lang.annotation.*;
	import java.lang.reflect.*;
	import java.util.*;
	import javax.management.*;

	/*
	This test checks that annotations produce Descriptor entries as
	specified in javax.management.DescriptorKey and javax.management.DescriptorField.
	It does the following:

	- An annotation consisting of an int and a String, each with an
	appropriate @DescriptorKey annotation, is placed on every program
	element where it can map to a Descriptor, namely:

	. on an MBean interface
	. on a getter for a read-only attribute
	. on a setter for a write-only attribute
	. on the getter but not the setter for a read/write attribute
	. on the setter but not the getter for a read/write attribute
	. on both the getter and the setter for a read/write attribute
	. on an operation
	. on each parameter of an operation
	. on a public constructor with no parameters
	. on a public constructor with a parameter
	. on the parameter of that public constructor
	. on all of the above for an MXBean instead of an MBean

	The test checks that in each case the corresponding Descriptor
	appears in the appropriate place inside the MBean's MBeanInfo.

	- A @DescriptorFields annotation defining two fields is placed in the
	same places and again the test checks that the two fields appear
	in the corresponding MBean*Info objects.

	- An annotation consisting of enough other types to ensure coverage
	is placed on a getter. The test checks that the generated
	MBeanAttributeInfo contains the corresponding Descriptor. The tested
	types are the following:

	. Class
	. an enumeration type (java.lang.annotation.RetentionPolicy)
	. boolean
	. String[]
	. Class[]
	. int[]
	. an array of enumeration type (RetentionPolicy[])
	. boolean[]
	*/
	public class AnnotationTest {
	private static String failed = null;

	@Retention(RetentionPolicy.RUNTIME)
	public static @interface Pair {
	@DescriptorKey("x")
	int x();
	@DescriptorKey("y")
	String y();
	}

	@Retention(RetentionPolicy.RUNTIME)
	public static @interface Full {
	@DescriptorKey("class")
	Class classValue();
	@DescriptorKey("enum")
	RetentionPolicy enumValue();
	@DescriptorKey("boolean")
	boolean booleanValue();
	@DescriptorKey("stringArray")
	String[] stringArrayValue();
	@DescriptorKey("classArray")
	Class[] classArrayValue();
	@DescriptorKey("intArray")
	int[] intArrayValue();
	@DescriptorKey("enumArray")
	RetentionPolicy[] enumArrayValue();
	@DescriptorKey("booleanArray")
	boolean[] booleanArrayValue();
	}

	/* We use the annotations @Pair(x = 3, y = "foo")
	and @DescriptorFields({"foo=bar", "baz="}) everywhere, and this is
	the Descriptor that they should produce: */
	private static Descriptor expectedDescriptor =
	new ImmutableDescriptor(new String[] {"x", "y", "foo", "baz"},
	new Object[] {3, "foo", "bar", ""});

	private static Descriptor expectedFullDescriptor =
	new ImmutableDescriptor(new String[] {
	"class", "enum", "boolean", "stringArray",
	"classArray", "intArray", "enumArray",
	"booleanArray",
	},
	new Object[] {
	Full.class.getName(),
	RetentionPolicy.RUNTIME.name(),
	false,
	new String[] {"foo", "bar"},
	new String[] {Full.class.getName()},
	new int[] {1, 2},
	new String[] {RetentionPolicy.RUNTIME.name()},
	new boolean[] {false, true},
	});

	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	public static interface ThingMBean {
	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	@Full(classValue=Full.class,
	enumValue=RetentionPolicy.RUNTIME,
	booleanValue=false,
	stringArrayValue={"foo", "bar"},
	classArrayValue={Full.class},
	intArrayValue={1, 2},
	enumArrayValue={RetentionPolicy.RUNTIME},
	booleanArrayValue={false, true})
	int getReadOnly();

	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	void setWriteOnly(int x);

	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	int getReadWrite1();
	void setReadWrite1(int x);

	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	int getReadWrite2();
	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	void setReadWrite2(int x);

	int getReadWrite3();
	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	void setReadWrite3(int x);

	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	int operation(@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	int p1,
	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	int p2);
	}

	public static class Thing implements ThingMBean {
	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	public Thing() {}

	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	public Thing(
	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	int p1) {}

	public int getReadOnly() {return 0;}

	public void setWriteOnly(int x) {}

	public int getReadWrite1() {return 0;}
	public void setReadWrite1(int x) {}

	public int getReadWrite2() {return 0;}
	public void setReadWrite2(int x) {}

	public int getReadWrite3() {return 0;}
	public void setReadWrite3(int x) {}

	public int operation(int p1, int p2) {return 0;}
	}

	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	public static interface ThingMXBean extends ThingMBean {}

	public static class ThingImpl implements ThingMXBean {
	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	public ThingImpl() {}

	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	public ThingImpl(
	@Pair(x = 3, y = "foo")
	@DescriptorFields({"foo=bar", "baz="})
	int p1) {}

	public int getReadOnly() {return 0;}

	public void setWriteOnly(int x) {}

	public int getReadWrite1() {return 0;}
	public void setReadWrite1(int x) {}

	public int getReadWrite2() {return 0;}
	public void setReadWrite2(int x) {}

	public int getReadWrite3() {return 0;}
	public void setReadWrite3(int x) {}

	public int operation(int p1, int p2) {return 0;}
	}

	@Retention(RetentionPolicy.RUNTIME)
	public static @interface DefaultTest {
	@DescriptorKey(value = "string1", omitIfDefault = true)
	String string1() default "";
	@DescriptorKey(value = "string2", omitIfDefault = true)
	String string2() default "tiddly pom";
	@DescriptorKey(value = "int", omitIfDefault = true)
	int intx() default 23;
	@DescriptorKey(value = "intarray1", omitIfDefault = true)
	int[] intArray1() default {};
	@DescriptorKey(value = "intarray2", omitIfDefault = true)
	int[] intArray2() default {1, 2};
	@DescriptorKey(value = "stringarray1", omitIfDefault = true)
	String[] stringArray1() default {};
	@DescriptorKey(value = "stringarray2", omitIfDefault = true)
	String[] stringArray2() default {"foo", "bar"};
	}

	@Retention(RetentionPolicy.RUNTIME)
	public static @interface Expect {
	String[] value() default {};
	}

	public static interface DefaultMBean {
	@DefaultTest
	@Expect()
	public void a();

	@DefaultTest(string1="")
	@Expect()
	public void b();

	@DefaultTest(string1="nondefault")
	@Expect("string1=nondefault")
	public void c();

	@DefaultTest(string2="tiddly pom")
	@Expect()
	public void d();

	@DefaultTest(intx=23)
	@Expect()
	public void e();

	@DefaultTest(intx=34)
	@Expect("int=34")
	public void f();

	@DefaultTest(intArray1={})
	@Expect()
	public void g();

	@DefaultTest(intArray1={2,3})
	@Expect("intarray1=[2, 3]")
	public void h();

	@DefaultTest(intArray2={})
	@Expect("intarray2=[]")
	public void i();

	@DefaultTest(stringArray1={})
	@Expect()
	public void j();

	@DefaultTest(stringArray1={"foo"})
	@Expect("stringarray1=[foo]")
	public void k();

	@DefaultTest(stringArray2={})
	@Expect("stringarray2=[]")
	public void l();
	}

	public static void main(String[] args) throws Exception {
	System.out.println("Testing that annotations are correctly " +
	"reflected in Descriptor entries");

	MBeanServer mbs =
	java.lang.management.ManagementFactory.getPlatformMBeanServer();
	ObjectName on = new ObjectName("a:b=c");

	Thing thing = new Thing();
	mbs.registerMBean(thing, on);
	check(mbs, on);
	mbs.unregisterMBean(on);

	ThingImpl thingImpl = new ThingImpl();
	mbs.registerMBean(thingImpl, on);
	Descriptor d = mbs.getMBeanInfo(on).getDescriptor();
	if (!d.getFieldValue("mxbean").equals("true")) {
	System.out.println("NOT OK: expected MXBean");
	failed = "Expected MXBean";
	}
	check(mbs, on);

	System.out.println();
	System.out.println("Testing that omitIfDefault works");
	DefaultMBean defaultImpl = (DefaultMBean) Proxy.newProxyInstance(
	DefaultMBean.class.getClassLoader(),
	new Class<?>[] {DefaultMBean.class},
	new InvocationHandler(){
	public Object invoke(Object proxy, Method method, Object[] args) {
	return null;
	}
	});
	DynamicMBean mbean = new StandardMBean(defaultImpl, DefaultMBean.class);
	MBeanOperationInfo[] ops = mbean.getMBeanInfo().getOperations();
	for (MBeanOperationInfo op : ops) {
	String name = op.getName();
	Expect expect =
	DefaultMBean.class.getMethod(name).getAnnotation(Expect.class);
	Descriptor opd = op.getDescriptor();
	List<String> fields = new ArrayList<String>();
	for (String fieldName : opd.getFieldNames()) {
	Object value = opd.getFieldValue(fieldName);
	String s = Arrays.deepToString(new Object[] {value});
	s = s.substring(1, s.length() - 1);
	fields.add(fieldName + "=" + s);
	}
	Descriptor opds = new ImmutableDescriptor(fields.toArray(new String[0]));
	Descriptor expd = new ImmutableDescriptor(expect.value());
	if (opds.equals(expd))
	System.out.println("OK: op " + name + ": " + opds);
	else {
	String failure = "Bad descriptor for op " + name + ": " +
	"expected " + expd + ", got " + opds;
	System.out.println("NOT OK: " + failure);
	failed = failure;
	}
	}
	System.out.println();

	if (failed == null)
	System.out.println("Test passed");
	else
	throw new Exception("TEST FAILED: " + failed);
	}

	private static void check(MBeanServer mbs, ObjectName on) throws Exception {
	MBeanInfo mbi = mbs.getMBeanInfo(on);

	// check the MBean itself
	check(mbi);

	// check attributes
	MBeanAttributeInfo[] attrs = mbi.getAttributes();
	for (MBeanAttributeInfo attr : attrs) {
	check(attr);
	if (attr.getName().equals("ReadOnly"))
	check("@Full", attr.getDescriptor(), expectedFullDescriptor);
	}

	// check operations
	MBeanOperationInfo[] ops = mbi.getOperations();
	for (MBeanOperationInfo op : ops) {
	check(op);
	check(op.getSignature());
	}

	MBeanConstructorInfo[] constrs = mbi.getConstructors();
	for (MBeanConstructorInfo constr : constrs) {
	check(constr);
	check(constr.getSignature());
	}
	}

	private static void check(DescriptorRead x) {
	check(x, x.getDescriptor(), expectedDescriptor);
	}

	private static void check(Object x, Descriptor d, Descriptor expect) {
	String fail = null;
	try {
	Descriptor u = ImmutableDescriptor.union(d, expect);
	if (!u.equals(d))
	fail = "should contain " + expect + "; is " + d;
	} catch (IllegalArgumentException e) {
	fail = e.getMessage();
	}
	if (fail == null) {
	System.out.println("OK: " + x);
	} else {
	failed = "NOT OK: Incorrect descriptor for: " + x;
	System.out.println(failed);
	System.out.println("..." + fail);
	}
	}

	private static void check(DescriptorRead[] xx) {
	for (DescriptorRead x : xx)
	check(x);
	}
	}