test/674-hiddenapi/src-ex/ChildClass.java - platform/art - Gitiles

 /*
  * Copyright (C) 2017 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 import java.lang.annotation.Annotation;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.util.Arrays;
 import java.util.List;

 import javax.lang.model.element.AnnotationMirror;
 import javax.lang.model.type.PrimitiveType;
 import javax.lang.model.type.TypeKind;
 import javax.lang.model.type.TypeVisitor;

 public class ChildClass {
   enum PrimitiveType {
     TInteger('I', Integer.TYPE, Integer.valueOf(0)),
     TLong('J', Long.TYPE, Long.valueOf(0)),
     TFloat('F', Float.TYPE, Float.valueOf(0)),
     TDouble('D', Double.TYPE, Double.valueOf(0)),
     TBoolean('Z', Boolean.TYPE, Boolean.valueOf(false)),
     TByte('B', Byte.TYPE, Byte.valueOf((byte) 0)),
     TShort('S', Short.TYPE, Short.valueOf((short) 0)),
     TCharacter('C', Character.TYPE, Character.valueOf('0'));

     PrimitiveType(char shorty, Class klass, Object value) {
       mShorty = shorty;
       mClass = klass;
       mDefaultValue = value;
     }

     public char mShorty;
     public Class mClass;
     public Object mDefaultValue;
   }

   enum Hiddenness {
     Whitelist(PrimitiveType.TShort),
     LightGreylist(PrimitiveType.TBoolean),
     DarkGreylist(PrimitiveType.TByte),
     Blacklist(PrimitiveType.TCharacter);

     Hiddenness(PrimitiveType type) { mAssociatedType = type; }
     public PrimitiveType mAssociatedType;
   }

   enum Visibility {
     Public(PrimitiveType.TInteger),
     Package(PrimitiveType.TFloat),
     Protected(PrimitiveType.TLong),
     Private(PrimitiveType.TDouble);

     Visibility(PrimitiveType type) { mAssociatedType = type; }
     public PrimitiveType mAssociatedType;
   }

   enum Behaviour {
     Granted,
     Warning,
     Denied,
   }

   private static final boolean booleanValues[] = new boolean[] { false, true };

   public static void runTest(String libFileName, boolean expectedParentInBoot,
       boolean expectedChildInBoot) throws Exception {
     System.load(libFileName);

     // Check expectations about loading into boot class path.
     isParentInBoot = (ParentClass.class.getClassLoader().getParent() == null);
     if (isParentInBoot != expectedParentInBoot) {
       throw new RuntimeException("Expected ParentClass " +
                                  (expectedParentInBoot ? "" : "not ") + "in boot class path");
     }
     isChildInBoot = (ChildClass.class.getClassLoader().getParent() == null);
     if (isChildInBoot != expectedChildInBoot) {
       throw new RuntimeException("Expected ChildClass " + (expectedChildInBoot ? "" : "not ") +
                                  "in boot class path");
     }

     boolean isSameBoot = (isParentInBoot == isChildInBoot);

     // Run meaningful combinations of access flags.
     for (Hiddenness hiddenness : Hiddenness.values()) {
       final Behaviour expected;
       if (isSameBoot || hiddenness == Hiddenness.Whitelist) {
         expected = Behaviour.Granted;
       } else if (hiddenness == Hiddenness.Blacklist) {
         expected = Behaviour.Denied;
       } else {
         expected = Behaviour.Warning;
       }

       for (boolean isStatic : booleanValues) {
         String suffix = (isStatic ? "Static" : "") + hiddenness.name();

         for (Visibility visibility : Visibility.values()) {
           // Test reflection and JNI on methods and fields
           for (Class klass : new Class<?>[] { ParentClass.class, ParentInterface.class }) {
             String baseName = visibility.name() + suffix;
             checkField(klass, "field" + baseName, isStatic, visibility, expected);
             checkMethod(klass, "method" + baseName, isStatic, visibility, expected);
           }

           // Check whether one can use a class constructor.
           checkConstructor(ParentClass.class, visibility, hiddenness, expected);

           // Check whether one can use an interface default method.
           String name = "method" + visibility.name() + "Default" + hiddenness.name();
           checkMethod(ParentInterface.class, name, /*isStatic*/ false, visibility, expected);
         }

         // Test whether static linking succeeds.
         checkLinking("LinkFieldGet" + suffix, /*takesParameter*/ false, expected);
         checkLinking("LinkFieldSet" + suffix, /*takesParameter*/ true, expected);
         checkLinking("LinkMethod" + suffix, /*takesParameter*/ false, expected);
       }

       // Check whether Class.newInstance succeeds.
       checkNullaryConstructor(Class.forName("NullaryConstructor" + hiddenness.name()), expected);
     }
   }

   private static void checkField(Class<?> klass, String name, boolean isStatic,
       Visibility visibility, Behaviour behaviour) throws Exception {

     boolean isPublic = (visibility == Visibility.Public);
     boolean canDiscover = (behaviour != Behaviour.Denied);
     boolean setsWarning = (behaviour == Behaviour.Warning);

     if (klass.isInterface() && (!isStatic || !isPublic)) {
       // Interfaces only have public static fields.
       return;
     }

     // Test discovery with reflection.

     if (Reflection.canDiscoverWithGetDeclaredField(klass, name) != canDiscover) {
       throwDiscoveryException(klass, name, true, "getDeclaredField()", canDiscover);
     }

     if (Reflection.canDiscoverWithGetDeclaredFields(klass, name) != canDiscover) {
       throwDiscoveryException(klass, name, true, "getDeclaredFields()", canDiscover);
     }

     if (Reflection.canDiscoverWithGetField(klass, name) != (canDiscover && isPublic)) {
       throwDiscoveryException(klass, name, true, "getField()", (canDiscover && isPublic));
     }

     if (Reflection.canDiscoverWithGetFields(klass, name) != (canDiscover && isPublic)) {
       throwDiscoveryException(klass, name, true, "getFields()", (canDiscover && isPublic));
     }

     // Test discovery with JNI.

     if (JNI.canDiscoverField(klass, name, isStatic) != canDiscover) {
       throwDiscoveryException(klass, name, true, "JNI", canDiscover);
     }

     // Finish here if we could not discover the field.

     if (!canDiscover) {
       return;
     }

     // Test that modifiers are unaffected.

     if (Reflection.canObserveFieldHiddenAccessFlags(klass, name)) {
       throwModifiersException(klass, name, true);
     }

     // Test getters and setters when meaningful.

     clearWarning();
     if (!Reflection.canGetField(klass, name)) {
       throwAccessException(klass, name, true, "Field.getInt()");
     }
     if (hasPendingWarning() != setsWarning) {
       throwWarningException(klass, name, true, "Field.getInt()", setsWarning);
     }

     clearWarning();
     if (!Reflection.canSetField(klass, name)) {
       throwAccessException(klass, name, true, "Field.setInt()");
     }
     if (hasPendingWarning() != setsWarning) {
       throwWarningException(klass, name, true, "Field.setInt()", setsWarning);
     }

     clearWarning();
     if (!JNI.canGetField(klass, name, isStatic)) {
       throwAccessException(klass, name, true, "getIntField");
     }
     if (hasPendingWarning() != setsWarning) {
       throwWarningException(klass, name, true, "getIntField", setsWarning);
     }

     clearWarning();
     if (!JNI.canSetField(klass, name, isStatic)) {
       throwAccessException(klass, name, true, "setIntField");
     }
     if (hasPendingWarning() != setsWarning) {
       throwWarningException(klass, name, true, "setIntField", setsWarning);
     }
   }

   private static void checkMethod(Class<?> klass, String name, boolean isStatic,
       Visibility visibility, Behaviour behaviour) throws Exception {

     boolean isPublic = (visibility == Visibility.Public);
     if (klass.isInterface() && !isPublic) {
       // All interface members are public.
       return;
     }

     boolean canDiscover = (behaviour != Behaviour.Denied);
     boolean setsWarning = (behaviour == Behaviour.Warning);

     // Test discovery with reflection.

     if (Reflection.canDiscoverWithGetDeclaredMethod(klass, name) != canDiscover) {
       throwDiscoveryException(klass, name, false, "getDeclaredMethod()", canDiscover);
     }

     if (Reflection.canDiscoverWithGetDeclaredMethods(klass, name) != canDiscover) {
       throwDiscoveryException(klass, name, false, "getDeclaredMethods()", canDiscover);
     }

     if (Reflection.canDiscoverWithGetMethod(klass, name) != (canDiscover && isPublic)) {
       throwDiscoveryException(klass, name, false, "getMethod()", (canDiscover && isPublic));
     }

     if (Reflection.canDiscoverWithGetMethods(klass, name) != (canDiscover && isPublic)) {
       throwDiscoveryException(klass, name, false, "getMethods()", (canDiscover && isPublic));
     }

     // Test discovery with JNI.

     if (JNI.canDiscoverMethod(klass, name, isStatic) != canDiscover) {
       throwDiscoveryException(klass, name, false, "JNI", canDiscover);
     }

     // Finish here if we could not discover the field.

     if (!canDiscover) {
       return;
     }

     // Test that modifiers are unaffected.

     if (Reflection.canObserveMethodHiddenAccessFlags(klass, name)) {
       throwModifiersException(klass, name, false);
     }

     // Test whether we can invoke the method. This skips non-static interface methods.

     if (!klass.isInterface() || isStatic) {
       clearWarning();
       if (!Reflection.canInvokeMethod(klass, name)) {
         throwAccessException(klass, name, false, "invoke()");
       }
       if (hasPendingWarning() != setsWarning) {
         throwWarningException(klass, name, false, "invoke()", setsWarning);
       }

       clearWarning();
       if (!JNI.canInvokeMethodA(klass, name, isStatic)) {
         throwAccessException(klass, name, false, "CallMethodA");
       }
       if (hasPendingWarning() != setsWarning) {
         throwWarningException(klass, name, false, "CallMethodA()", setsWarning);
       }

       clearWarning();
       if (!JNI.canInvokeMethodV(klass, name, isStatic)) {
         throwAccessException(klass, name, false, "CallMethodV");
       }
       if (hasPendingWarning() != setsWarning) {
         throwWarningException(klass, name, false, "CallMethodV()", setsWarning);
       }
     }
   }

   private static void checkConstructor(Class<?> klass, Visibility visibility, Hiddenness hiddenness,
       Behaviour behaviour) throws Exception {

     boolean isPublic = (visibility == Visibility.Public);
     String signature = "(" + visibility.mAssociatedType.mShorty +
                              hiddenness.mAssociatedType.mShorty + ")V";
     String fullName = "<init>" + signature;
     Class<?> args[] = new Class[] { visibility.mAssociatedType.mClass,
                                     hiddenness.mAssociatedType.mClass };
     Object initargs[] = new Object[] { visibility.mAssociatedType.mDefaultValue,
                                        hiddenness.mAssociatedType.mDefaultValue };

     boolean canDiscover = (behaviour != Behaviour.Denied);
     boolean setsWarning = (behaviour == Behaviour.Warning);

     // Test discovery with reflection.

     if (Reflection.canDiscoverWithGetDeclaredConstructor(klass, args) != canDiscover) {
       throwDiscoveryException(klass, fullName, false, "getDeclaredConstructor()", canDiscover);
     }

     if (Reflection.canDiscoverWithGetDeclaredConstructors(klass, args) != canDiscover) {
       throwDiscoveryException(klass, fullName, false, "getDeclaredConstructors()", canDiscover);
     }

     if (Reflection.canDiscoverWithGetConstructor(klass, args) != (canDiscover && isPublic)) {
       throwDiscoveryException(
           klass, fullName, false, "getConstructor()", (canDiscover && isPublic));
     }

     if (Reflection.canDiscoverWithGetConstructors(klass, args) != (canDiscover && isPublic)) {
       throwDiscoveryException(
           klass, fullName, false, "getConstructors()", (canDiscover && isPublic));
     }

     // Test discovery with JNI.

     if (JNI.canDiscoverConstructor(klass, signature) != canDiscover) {
       throwDiscoveryException(klass, fullName, false, "JNI", canDiscover);
     }

     // Finish here if we could not discover the field.

     if (!canDiscover) {
       return;
     }

     // Test whether we can invoke the constructor.

     clearWarning();
     if (!Reflection.canInvokeConstructor(klass, args, initargs)) {
       throwAccessException(klass, fullName, false, "invoke()");
     }
     if (hasPendingWarning() != setsWarning) {
       throwWarningException(klass, fullName, false, "invoke()", setsWarning);
     }

     clearWarning();
     if (!JNI.canInvokeConstructorA(klass, signature)) {
       throwAccessException(klass, fullName, false, "NewObjectA");
     }
     if (hasPendingWarning() != setsWarning) {
       throwWarningException(klass, fullName, false, "NewObjectA", setsWarning);
     }

     clearWarning();
     if (!JNI.canInvokeConstructorV(klass, signature)) {
       throwAccessException(klass, fullName, false, "NewObjectV");
     }
     if (hasPendingWarning() != setsWarning) {
       throwWarningException(klass, fullName, false, "NewObjectV", setsWarning);
     }
   }

   private static void checkNullaryConstructor(Class<?> klass, Behaviour behaviour)
       throws Exception {
     boolean canAccess = (behaviour != Behaviour.Denied);
     boolean setsWarning = (behaviour == Behaviour.Warning);

     clearWarning();
     if (Reflection.canUseNewInstance(klass) != canAccess) {
       throw new RuntimeException("Expected to " + (canAccess ? "" : "not ") +
           "be able to construct " + klass.getName() + ". " +
           "isParentInBoot = " + isParentInBoot + ", " + "isChildInBoot = " + isChildInBoot);
     }
     if (canAccess && hasPendingWarning() != setsWarning) {
       throwWarningException(klass, "nullary constructor", false, "newInstance", setsWarning);
     }
   }

   private static void checkLinking(String className, boolean takesParameter, Behaviour behaviour)
       throws Exception {
     boolean canAccess = (behaviour != Behaviour.Denied);
     boolean setsWarning = (behaviour == Behaviour.Warning);

     clearWarning();
     if (Linking.canAccess(className, takesParameter) != canAccess) {
       throw new RuntimeException("Expected to " + (canAccess ? "" : "not ") +
           "be able to verify " + className + "." +
           "isParentInBoot = " + isParentInBoot + ", " + "isChildInBoot = " + isChildInBoot);
     }
     if (canAccess && hasPendingWarning() != setsWarning) {
       throwWarningException(
           Class.forName(className), "access", false, "static linking", setsWarning);
     }
   }

   private static void throwDiscoveryException(Class<?> klass, String name, boolean isField,
       String fn, boolean canAccess) {
     throw new RuntimeException("Expected " + (isField ? "field " : "method ") + klass.getName() +
         "." + name + " to " + (canAccess ? "" : "not ") + "be discoverable with " + fn + ". " +
         "isParentInBoot = " + isParentInBoot + ", " + "isChildInBoot = " + isChildInBoot);
   }

   private static void throwAccessException(Class<?> klass, String name, boolean isField,
       String fn) {
     throw new RuntimeException("Expected to be able to access " + (isField ? "field " : "method ") +
         klass.getName() + "." + name + " using " + fn + ". " +
         "isParentInBoot = " + isParentInBoot + ", " + "isChildInBoot = " + isChildInBoot);
   }

   private static void throwWarningException(Class<?> klass, String name, boolean isField,
       String fn, boolean setsWarning) {
     throw new RuntimeException("Expected access to " + (isField ? "field " : "method ") +
         klass.getName() + "." + name + " using " + fn + " to " + (setsWarning ? "" : "not ") +
         "set the warning flag. " +
         "isParentInBoot = " + isParentInBoot + ", " + "isChildInBoot = " + isChildInBoot);
   }

   private static void throwModifiersException(Class<?> klass, String name, boolean isField) {
     throw new RuntimeException("Expected " + (isField ? "field " : "method ") + klass.getName() +
         "." + name + " to not expose hidden modifiers");
   }

   private static boolean isParentInBoot;
   private static boolean isChildInBoot;

   private static native boolean hasPendingWarning();
   private static native void clearWarning();
 }
	/*
	* Copyright (C) 2017 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	import java.lang.annotation.Annotation;
	import java.lang.reflect.Constructor;
	import java.lang.reflect.Field;
	import java.lang.reflect.InvocationTargetException;
	import java.lang.reflect.Method;
	import java.util.Arrays;
	import java.util.List;

	import javax.lang.model.element.AnnotationMirror;
	import javax.lang.model.type.PrimitiveType;
	import javax.lang.model.type.TypeKind;
	import javax.lang.model.type.TypeVisitor;

	public class ChildClass {
	enum PrimitiveType {
	TInteger('I', Integer.TYPE, Integer.valueOf(0)),
	TLong('J', Long.TYPE, Long.valueOf(0)),
	TFloat('F', Float.TYPE, Float.valueOf(0)),
	TDouble('D', Double.TYPE, Double.valueOf(0)),
	TBoolean('Z', Boolean.TYPE, Boolean.valueOf(false)),
	TByte('B', Byte.TYPE, Byte.valueOf((byte) 0)),
	TShort('S', Short.TYPE, Short.valueOf((short) 0)),
	TCharacter('C', Character.TYPE, Character.valueOf('0'));

	PrimitiveType(char shorty, Class klass, Object value) {
	mShorty = shorty;
	mClass = klass;
	mDefaultValue = value;
	}

	public char mShorty;
	public Class mClass;
	public Object mDefaultValue;
	}

	enum Hiddenness {
	Whitelist(PrimitiveType.TShort),
	LightGreylist(PrimitiveType.TBoolean),
	DarkGreylist(PrimitiveType.TByte),
	Blacklist(PrimitiveType.TCharacter);

	Hiddenness(PrimitiveType type) { mAssociatedType = type; }
	public PrimitiveType mAssociatedType;
	}

	enum Visibility {
	Public(PrimitiveType.TInteger),
	Package(PrimitiveType.TFloat),
	Protected(PrimitiveType.TLong),
	Private(PrimitiveType.TDouble);

	Visibility(PrimitiveType type) { mAssociatedType = type; }
	public PrimitiveType mAssociatedType;
	}

	enum Behaviour {
	Granted,
	Warning,
	Denied,
	}

	private static final boolean booleanValues[] = new boolean[] { false, true };

	public static void runTest(String libFileName, boolean expectedParentInBoot,
	boolean expectedChildInBoot) throws Exception {
	System.load(libFileName);

	// Check expectations about loading into boot class path.
	isParentInBoot = (ParentClass.class.getClassLoader().getParent() == null);
	if (isParentInBoot != expectedParentInBoot) {
	throw new RuntimeException("Expected ParentClass " +
	(expectedParentInBoot ? "" : "not ") + "in boot class path");
	}
	isChildInBoot = (ChildClass.class.getClassLoader().getParent() == null);
	if (isChildInBoot != expectedChildInBoot) {
	throw new RuntimeException("Expected ChildClass " + (expectedChildInBoot ? "" : "not ") +
	"in boot class path");
	}

	boolean isSameBoot = (isParentInBoot == isChildInBoot);

	// Run meaningful combinations of access flags.
	for (Hiddenness hiddenness : Hiddenness.values()) {
	final Behaviour expected;
	if (isSameBoot \|\| hiddenness == Hiddenness.Whitelist) {
	expected = Behaviour.Granted;
	} else if (hiddenness == Hiddenness.Blacklist) {
	expected = Behaviour.Denied;
	} else {
	expected = Behaviour.Warning;
	}

	for (boolean isStatic : booleanValues) {
	String suffix = (isStatic ? "Static" : "") + hiddenness.name();

	for (Visibility visibility : Visibility.values()) {
	// Test reflection and JNI on methods and fields
	for (Class klass : new Class<?>[] { ParentClass.class, ParentInterface.class }) {
	String baseName = visibility.name() + suffix;
	checkField(klass, "field" + baseName, isStatic, visibility, expected);
	checkMethod(klass, "method" + baseName, isStatic, visibility, expected);
	}

	// Check whether one can use a class constructor.
	checkConstructor(ParentClass.class, visibility, hiddenness, expected);

	// Check whether one can use an interface default method.
	String name = "method" + visibility.name() + "Default" + hiddenness.name();
	checkMethod(ParentInterface.class, name, /isStatic/ false, visibility, expected);
	}

	// Test whether static linking succeeds.
	checkLinking("LinkFieldGet" + suffix, /takesParameter/ false, expected);
	checkLinking("LinkFieldSet" + suffix, /takesParameter/ true, expected);
	checkLinking("LinkMethod" + suffix, /takesParameter/ false, expected);
	}

	// Check whether Class.newInstance succeeds.
	checkNullaryConstructor(Class.forName("NullaryConstructor" + hiddenness.name()), expected);
	}
	}

	private static void checkField(Class<?> klass, String name, boolean isStatic,
	Visibility visibility, Behaviour behaviour) throws Exception {

	boolean isPublic = (visibility == Visibility.Public);
	boolean canDiscover = (behaviour != Behaviour.Denied);
	boolean setsWarning = (behaviour == Behaviour.Warning);

	if (klass.isInterface() && (!isStatic \|\| !isPublic)) {
	// Interfaces only have public static fields.
	return;
	}

	// Test discovery with reflection.

	if (Reflection.canDiscoverWithGetDeclaredField(klass, name) != canDiscover) {
	throwDiscoveryException(klass, name, true, "getDeclaredField()", canDiscover);
	}

	if (Reflection.canDiscoverWithGetDeclaredFields(klass, name) != canDiscover) {
	throwDiscoveryException(klass, name, true, "getDeclaredFields()", canDiscover);
	}

	if (Reflection.canDiscoverWithGetField(klass, name) != (canDiscover && isPublic)) {
	throwDiscoveryException(klass, name, true, "getField()", (canDiscover && isPublic));
	}

	if (Reflection.canDiscoverWithGetFields(klass, name) != (canDiscover && isPublic)) {
	throwDiscoveryException(klass, name, true, "getFields()", (canDiscover && isPublic));
	}

	// Test discovery with JNI.

	if (JNI.canDiscoverField(klass, name, isStatic) != canDiscover) {
	throwDiscoveryException(klass, name, true, "JNI", canDiscover);
	}

	// Finish here if we could not discover the field.

	if (!canDiscover) {
	return;
	}

	// Test that modifiers are unaffected.

	if (Reflection.canObserveFieldHiddenAccessFlags(klass, name)) {
	throwModifiersException(klass, name, true);
	}

	// Test getters and setters when meaningful.

	clearWarning();
	if (!Reflection.canGetField(klass, name)) {
	throwAccessException(klass, name, true, "Field.getInt()");
	}
	if (hasPendingWarning() != setsWarning) {
	throwWarningException(klass, name, true, "Field.getInt()", setsWarning);
	}

	clearWarning();
	if (!Reflection.canSetField(klass, name)) {
	throwAccessException(klass, name, true, "Field.setInt()");
	}
	if (hasPendingWarning() != setsWarning) {
	throwWarningException(klass, name, true, "Field.setInt()", setsWarning);
	}

	clearWarning();
	if (!JNI.canGetField(klass, name, isStatic)) {
	throwAccessException(klass, name, true, "getIntField");
	}
	if (hasPendingWarning() != setsWarning) {
	throwWarningException(klass, name, true, "getIntField", setsWarning);
	}

	clearWarning();
	if (!JNI.canSetField(klass, name, isStatic)) {
	throwAccessException(klass, name, true, "setIntField");
	}
	if (hasPendingWarning() != setsWarning) {
	throwWarningException(klass, name, true, "setIntField", setsWarning);
	}
	}

	private static void checkMethod(Class<?> klass, String name, boolean isStatic,
	Visibility visibility, Behaviour behaviour) throws Exception {

	boolean isPublic = (visibility == Visibility.Public);
	if (klass.isInterface() && !isPublic) {
	// All interface members are public.
	return;
	}

	boolean canDiscover = (behaviour != Behaviour.Denied);
	boolean setsWarning = (behaviour == Behaviour.Warning);

	// Test discovery with reflection.

	if (Reflection.canDiscoverWithGetDeclaredMethod(klass, name) != canDiscover) {
	throwDiscoveryException(klass, name, false, "getDeclaredMethod()", canDiscover);
	}

	if (Reflection.canDiscoverWithGetDeclaredMethods(klass, name) != canDiscover) {
	throwDiscoveryException(klass, name, false, "getDeclaredMethods()", canDiscover);
	}

	if (Reflection.canDiscoverWithGetMethod(klass, name) != (canDiscover && isPublic)) {
	throwDiscoveryException(klass, name, false, "getMethod()", (canDiscover && isPublic));
	}

	if (Reflection.canDiscoverWithGetMethods(klass, name) != (canDiscover && isPublic)) {
	throwDiscoveryException(klass, name, false, "getMethods()", (canDiscover && isPublic));
	}

	// Test discovery with JNI.

	if (JNI.canDiscoverMethod(klass, name, isStatic) != canDiscover) {
	throwDiscoveryException(klass, name, false, "JNI", canDiscover);
	}

	// Finish here if we could not discover the field.

	if (!canDiscover) {
	return;
	}

	// Test that modifiers are unaffected.

	if (Reflection.canObserveMethodHiddenAccessFlags(klass, name)) {
	throwModifiersException(klass, name, false);
	}

	// Test whether we can invoke the method. This skips non-static interface methods.

	if (!klass.isInterface() \|\| isStatic) {
	clearWarning();
	if (!Reflection.canInvokeMethod(klass, name)) {
	throwAccessException(klass, name, false, "invoke()");
	}
	if (hasPendingWarning() != setsWarning) {
	throwWarningException(klass, name, false, "invoke()", setsWarning);
	}

	clearWarning();
	if (!JNI.canInvokeMethodA(klass, name, isStatic)) {
	throwAccessException(klass, name, false, "CallMethodA");
	}
	if (hasPendingWarning() != setsWarning) {
	throwWarningException(klass, name, false, "CallMethodA()", setsWarning);
	}

	clearWarning();
	if (!JNI.canInvokeMethodV(klass, name, isStatic)) {
	throwAccessException(klass, name, false, "CallMethodV");
	}
	if (hasPendingWarning() != setsWarning) {
	throwWarningException(klass, name, false, "CallMethodV()", setsWarning);
	}
	}
	}

	private static void checkConstructor(Class<?> klass, Visibility visibility, Hiddenness hiddenness,
	Behaviour behaviour) throws Exception {

	boolean isPublic = (visibility == Visibility.Public);
	String signature = "(" + visibility.mAssociatedType.mShorty +
	hiddenness.mAssociatedType.mShorty + ")V";
	String fullName = "<init>" + signature;
	Class<?> args[] = new Class[] { visibility.mAssociatedType.mClass,
	hiddenness.mAssociatedType.mClass };
	Object initargs[] = new Object[] { visibility.mAssociatedType.mDefaultValue,
	hiddenness.mAssociatedType.mDefaultValue };

	boolean canDiscover = (behaviour != Behaviour.Denied);
	boolean setsWarning = (behaviour == Behaviour.Warning);

	// Test discovery with reflection.

	if (Reflection.canDiscoverWithGetDeclaredConstructor(klass, args) != canDiscover) {
	throwDiscoveryException(klass, fullName, false, "getDeclaredConstructor()", canDiscover);
	}

	if (Reflection.canDiscoverWithGetDeclaredConstructors(klass, args) != canDiscover) {
	throwDiscoveryException(klass, fullName, false, "getDeclaredConstructors()", canDiscover);
	}

	if (Reflection.canDiscoverWithGetConstructor(klass, args) != (canDiscover && isPublic)) {
	throwDiscoveryException(
	klass, fullName, false, "getConstructor()", (canDiscover && isPublic));
	}

	if (Reflection.canDiscoverWithGetConstructors(klass, args) != (canDiscover && isPublic)) {
	throwDiscoveryException(
	klass, fullName, false, "getConstructors()", (canDiscover && isPublic));
	}

	// Test discovery with JNI.

	if (JNI.canDiscoverConstructor(klass, signature) != canDiscover) {
	throwDiscoveryException(klass, fullName, false, "JNI", canDiscover);
	}

	// Finish here if we could not discover the field.

	if (!canDiscover) {
	return;
	}

	// Test whether we can invoke the constructor.

	clearWarning();
	if (!Reflection.canInvokeConstructor(klass, args, initargs)) {
	throwAccessException(klass, fullName, false, "invoke()");
	}
	if (hasPendingWarning() != setsWarning) {
	throwWarningException(klass, fullName, false, "invoke()", setsWarning);
	}

	clearWarning();
	if (!JNI.canInvokeConstructorA(klass, signature)) {
	throwAccessException(klass, fullName, false, "NewObjectA");
	}
	if (hasPendingWarning() != setsWarning) {
	throwWarningException(klass, fullName, false, "NewObjectA", setsWarning);
	}

	clearWarning();
	if (!JNI.canInvokeConstructorV(klass, signature)) {
	throwAccessException(klass, fullName, false, "NewObjectV");
	}
	if (hasPendingWarning() != setsWarning) {
	throwWarningException(klass, fullName, false, "NewObjectV", setsWarning);
	}
	}

	private static void checkNullaryConstructor(Class<?> klass, Behaviour behaviour)
	throws Exception {
	boolean canAccess = (behaviour != Behaviour.Denied);
	boolean setsWarning = (behaviour == Behaviour.Warning);

	clearWarning();
	if (Reflection.canUseNewInstance(klass) != canAccess) {
	throw new RuntimeException("Expected to " + (canAccess ? "" : "not ") +
	"be able to construct " + klass.getName() + ". " +
	"isParentInBoot = " + isParentInBoot + ", " + "isChildInBoot = " + isChildInBoot);
	}
	if (canAccess && hasPendingWarning() != setsWarning) {
	throwWarningException(klass, "nullary constructor", false, "newInstance", setsWarning);
	}
	}

	private static void checkLinking(String className, boolean takesParameter, Behaviour behaviour)
	throws Exception {
	boolean canAccess = (behaviour != Behaviour.Denied);
	boolean setsWarning = (behaviour == Behaviour.Warning);

	clearWarning();
	if (Linking.canAccess(className, takesParameter) != canAccess) {
	throw new RuntimeException("Expected to " + (canAccess ? "" : "not ") +
	"be able to verify " + className + "." +
	"isParentInBoot = " + isParentInBoot + ", " + "isChildInBoot = " + isChildInBoot);
	}
	if (canAccess && hasPendingWarning() != setsWarning) {
	throwWarningException(
	Class.forName(className), "access", false, "static linking", setsWarning);
	}
	}

	private static void throwDiscoveryException(Class<?> klass, String name, boolean isField,
	String fn, boolean canAccess) {
	throw new RuntimeException("Expected " + (isField ? "field " : "method ") + klass.getName() +
	"." + name + " to " + (canAccess ? "" : "not ") + "be discoverable with " + fn + ". " +
	"isParentInBoot = " + isParentInBoot + ", " + "isChildInBoot = " + isChildInBoot);
	}

	private static void throwAccessException(Class<?> klass, String name, boolean isField,
	String fn) {
	throw new RuntimeException("Expected to be able to access " + (isField ? "field " : "method ") +
	klass.getName() + "." + name + " using " + fn + ". " +
	"isParentInBoot = " + isParentInBoot + ", " + "isChildInBoot = " + isChildInBoot);
	}

	private static void throwWarningException(Class<?> klass, String name, boolean isField,
	String fn, boolean setsWarning) {
	throw new RuntimeException("Expected access to " + (isField ? "field " : "method ") +
	klass.getName() + "." + name + " using " + fn + " to " + (setsWarning ? "" : "not ") +
	"set the warning flag. " +
	"isParentInBoot = " + isParentInBoot + ", " + "isChildInBoot = " + isChildInBoot);
	}

	private static void throwModifiersException(Class<?> klass, String name, boolean isField) {
	throw new RuntimeException("Expected " + (isField ? "field " : "method ") + klass.getName() +
	"." + name + " to not expose hidden modifiers");
	}

	private static boolean isParentInBoot;
	private static boolean isChildInBoot;

	private static native boolean hasPendingWarning();
	private static native void clearWarning();
	}