mirror of
https://github.com/openjdk/jdk.git
synced 2025-08-27 23:04:50 +02:00
8187443: Forest Consolidation: Move files to unified layout
Reviewed-by: darcy, ihse
This commit is contained in:
Erik Joelsson
parent
270fe13182
commit
3789983e89
56923 changed files with 3 additions and 15727 deletions
|
|
@ -0,0 +1,674 @@
|
|||
/*
|
||||
* Copyright (c) 1997, 2017, Oracle and/or its affiliates. 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. Oracle designates this
|
||||
* particular file as subject to the "Classpath" exception as provided
|
||||
* by Oracle in the LICENSE file that accompanied this code.
|
||||
*
|
||||
* 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
||||
* or visit www.oracle.com if you need additional information or have any
|
||||
* questions.
|
||||
*/
|
||||
|
||||
package java.lang.reflect;
|
||||
|
||||
import java.lang.annotation.Annotation;
|
||||
import java.security.AccessController;
|
||||
|
||||
import jdk.internal.misc.VM;
|
||||
import jdk.internal.module.IllegalAccessLogger;
|
||||
import jdk.internal.reflect.CallerSensitive;
|
||||
import jdk.internal.reflect.Reflection;
|
||||
import jdk.internal.reflect.ReflectionFactory;
|
||||
import sun.security.action.GetPropertyAction;
|
||||
|
||||
/**
|
||||
* The {@code AccessibleObject} class is the base class for {@code Field},
|
||||
* {@code Method}, and {@code Constructor} objects (known as <em>reflected
|
||||
* objects</em>). It provides the ability to flag a reflected object as
|
||||
* suppressing checks for Java language access control when it is used. This
|
||||
* permits sophisticated applications with sufficient privilege, such as Java
|
||||
* Object Serialization or other persistence mechanisms, to manipulate objects
|
||||
* in a manner that would normally be prohibited.
|
||||
*
|
||||
* <p> Java language access control prevents use of private members outside
|
||||
* their class; package access members outside their package; protected members
|
||||
* outside their package or subclasses; and public members outside their
|
||||
* module unless they are declared in an {@link Module#isExported(String,Module)
|
||||
* exported} package and the user {@link Module#canRead reads} their module. By
|
||||
* default, Java language access control is enforced (with one variation) when
|
||||
* {@code Field}s, {@code Method}s, or {@code Constructor}s are used to get or
|
||||
* set fields, to invoke methods, or to create and initialize new instances of
|
||||
* classes, respectively. Every reflected object checks that the code using it
|
||||
* is in an appropriate class, package, or module. </p>
|
||||
*
|
||||
* <p> The one variation from Java language access control is that the checks
|
||||
* by reflected objects assume readability. That is, the module containing
|
||||
* the use of a reflected object is assumed to read the module in which
|
||||
* the underlying field, method, or constructor is declared. </p>
|
||||
*
|
||||
* <p> Whether the checks for Java language access control can be suppressed
|
||||
* (and thus, whether access can be enabled) depends on whether the reflected
|
||||
* object corresponds to a member in an exported or open package
|
||||
* (see {@link #setAccessible(boolean)}). </p>
|
||||
*
|
||||
* @jls 6.6 Access Control
|
||||
* @since 1.2
|
||||
* @revised 9
|
||||
* @spec JPMS
|
||||
*/
|
||||
public class AccessibleObject implements AnnotatedElement {
|
||||
|
||||
/**
|
||||
* The Permission object that is used to check whether a client
|
||||
* has sufficient privilege to defeat Java language access
|
||||
* control checks.
|
||||
*/
|
||||
private static final java.security.Permission ACCESS_PERMISSION =
|
||||
new ReflectPermission("suppressAccessChecks");
|
||||
|
||||
static void checkPermission() {
|
||||
SecurityManager sm = System.getSecurityManager();
|
||||
if (sm != null) sm.checkPermission(ACCESS_PERMISSION);
|
||||
}
|
||||
|
||||
/**
|
||||
* Convenience method to set the {@code accessible} flag for an
|
||||
* array of reflected objects with a single security check (for efficiency).
|
||||
*
|
||||
* <p> This method may be used to enable access to all reflected objects in
|
||||
* the array when access to each reflected object can be enabled as
|
||||
* specified by {@link #setAccessible(boolean) setAccessible(boolean)}. </p>
|
||||
*
|
||||
* <p>If there is a security manager, its
|
||||
* {@code checkPermission} method is first called with a
|
||||
* {@code ReflectPermission("suppressAccessChecks")} permission.
|
||||
*
|
||||
* <p>A {@code SecurityException} is also thrown if any of the elements of
|
||||
* the input {@code array} is a {@link java.lang.reflect.Constructor}
|
||||
* object for the class {@code java.lang.Class} and {@code flag} is true.
|
||||
*
|
||||
* @param array the array of AccessibleObjects
|
||||
* @param flag the new value for the {@code accessible} flag
|
||||
* in each object
|
||||
* @throws InaccessibleObjectException if access cannot be enabled for all
|
||||
* objects in the array
|
||||
* @throws SecurityException if the request is denied by the security manager
|
||||
* or an element in the array is a constructor for {@code
|
||||
* java.lang.Class}
|
||||
* @see SecurityManager#checkPermission
|
||||
* @see ReflectPermission
|
||||
* @revised 9
|
||||
* @spec JPMS
|
||||
*/
|
||||
@CallerSensitive
|
||||
public static void setAccessible(AccessibleObject[] array, boolean flag) {
|
||||
checkPermission();
|
||||
if (flag) {
|
||||
Class<?> caller = Reflection.getCallerClass();
|
||||
array = array.clone();
|
||||
for (AccessibleObject ao : array) {
|
||||
ao.checkCanSetAccessible(caller);
|
||||
}
|
||||
}
|
||||
for (AccessibleObject ao : array) {
|
||||
ao.setAccessible0(flag);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Set the {@code accessible} flag for this reflected object to
|
||||
* the indicated boolean value. A value of {@code true} indicates that
|
||||
* the reflected object should suppress checks for Java language access
|
||||
* control when it is used. A value of {@code false} indicates that
|
||||
* the reflected object should enforce checks for Java language access
|
||||
* control when it is used, with the variation noted in the class description.
|
||||
*
|
||||
* <p> This method may be used by a caller in class {@code C} to enable
|
||||
* access to a {@link Member member} of {@link Member#getDeclaringClass()
|
||||
* declaring class} {@code D} if any of the following hold: </p>
|
||||
*
|
||||
* <ul>
|
||||
* <li> {@code C} and {@code D} are in the same module. </li>
|
||||
*
|
||||
* <li> The member is {@code public} and {@code D} is {@code public} in
|
||||
* a package that the module containing {@code D} {@link
|
||||
* Module#isExported(String,Module) exports} to at least the module
|
||||
* containing {@code C}. </li>
|
||||
*
|
||||
* <li> The member is {@code protected} {@code static}, {@code D} is
|
||||
* {@code public} in a package that the module containing {@code D}
|
||||
* exports to at least the module containing {@code C}, and {@code C}
|
||||
* is a subclass of {@code D}. </li>
|
||||
*
|
||||
* <li> {@code D} is in a package that the module containing {@code D}
|
||||
* {@link Module#isOpen(String,Module) opens} to at least the module
|
||||
* containing {@code C}.
|
||||
* All packages in unnamed and open modules are open to all modules and
|
||||
* so this method always succeeds when {@code D} is in an unnamed or
|
||||
* open module. </li>
|
||||
* </ul>
|
||||
*
|
||||
* <p> This method cannot be used to enable access to private members,
|
||||
* members with default (package) access, protected instance members, or
|
||||
* protected constructors when the declaring class is in a different module
|
||||
* to the caller and the package containing the declaring class is not open
|
||||
* to the caller's module. </p>
|
||||
*
|
||||
* <p> If there is a security manager, its
|
||||
* {@code checkPermission} method is first called with a
|
||||
* {@code ReflectPermission("suppressAccessChecks")} permission.
|
||||
*
|
||||
* @param flag the new value for the {@code accessible} flag
|
||||
* @throws InaccessibleObjectException if access cannot be enabled
|
||||
* @throws SecurityException if the request is denied by the security manager
|
||||
* @see #trySetAccessible
|
||||
* @see java.lang.invoke.MethodHandles#privateLookupIn
|
||||
* @revised 9
|
||||
* @spec JPMS
|
||||
*/
|
||||
public void setAccessible(boolean flag) {
|
||||
AccessibleObject.checkPermission();
|
||||
setAccessible0(flag);
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the accessible flag and returns the new value
|
||||
*/
|
||||
boolean setAccessible0(boolean flag) {
|
||||
this.override = flag;
|
||||
return flag;
|
||||
}
|
||||
|
||||
/**
|
||||
* Set the {@code accessible} flag for this reflected object to {@code true}
|
||||
* if possible. This method sets the {@code accessible} flag, as if by
|
||||
* invoking {@link #setAccessible(boolean) setAccessible(true)}, and returns
|
||||
* the possibly-updated value for the {@code accessible} flag. If access
|
||||
* cannot be enabled, i.e. the checks or Java language access control cannot
|
||||
* be suppressed, this method returns {@code false} (as opposed to {@code
|
||||
* setAccessible(true)} throwing {@code InaccessibleObjectException} when
|
||||
* it fails).
|
||||
*
|
||||
* <p> This method is a no-op if the {@code accessible} flag for
|
||||
* this reflected object is {@code true}.
|
||||
*
|
||||
* <p> For example, a caller can invoke {@code trySetAccessible}
|
||||
* on a {@code Method} object for a private instance method
|
||||
* {@code p.T::privateMethod} to suppress the checks for Java language access
|
||||
* control when the {@code Method} is invoked.
|
||||
* If {@code p.T} class is in a different module to the caller and
|
||||
* package {@code p} is open to at least the caller's module,
|
||||
* the code below successfully sets the {@code accessible} flag
|
||||
* to {@code true}.
|
||||
*
|
||||
* <pre>
|
||||
* {@code
|
||||
* p.T obj = ....; // instance of p.T
|
||||
* :
|
||||
* Method m = p.T.class.getDeclaredMethod("privateMethod");
|
||||
* if (m.trySetAccessible()) {
|
||||
* m.invoke(obj);
|
||||
* } else {
|
||||
* // package p is not opened to the caller to access private member of T
|
||||
* ...
|
||||
* }
|
||||
* }</pre>
|
||||
*
|
||||
* <p> If there is a security manager, its {@code checkPermission} method
|
||||
* is first called with a {@code ReflectPermission("suppressAccessChecks")}
|
||||
* permission. </p>
|
||||
*
|
||||
* @return {@code true} if the {@code accessible} flag is set to {@code true};
|
||||
* {@code false} if access cannot be enabled.
|
||||
* @throws SecurityException if the request is denied by the security manager
|
||||
*
|
||||
* @since 9
|
||||
* @spec JPMS
|
||||
* @see java.lang.invoke.MethodHandles#privateLookupIn
|
||||
*/
|
||||
@CallerSensitive
|
||||
public final boolean trySetAccessible() {
|
||||
AccessibleObject.checkPermission();
|
||||
|
||||
if (override == true) return true;
|
||||
|
||||
// if it's not a Constructor, Method, Field then no access check
|
||||
if (!Member.class.isInstance(this)) {
|
||||
return setAccessible0(true);
|
||||
}
|
||||
|
||||
// does not allow to suppress access check for Class's constructor
|
||||
Class<?> declaringClass = ((Member) this).getDeclaringClass();
|
||||
if (declaringClass == Class.class && this instanceof Constructor) {
|
||||
return false;
|
||||
}
|
||||
|
||||
if (checkCanSetAccessible(Reflection.getCallerClass(),
|
||||
declaringClass,
|
||||
false)) {
|
||||
return setAccessible0(true);
|
||||
} else {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* If the given AccessibleObject is a {@code Constructor}, {@code Method}
|
||||
* or {@code Field} then checks that its declaring class is in a package
|
||||
* that can be accessed by the given caller of setAccessible.
|
||||
*/
|
||||
void checkCanSetAccessible(Class<?> caller) {
|
||||
// do nothing, needs to be overridden by Constructor, Method, Field
|
||||
}
|
||||
|
||||
|
||||
void checkCanSetAccessible(Class<?> caller, Class<?> declaringClass) {
|
||||
checkCanSetAccessible(caller, declaringClass, true);
|
||||
}
|
||||
|
||||
private boolean checkCanSetAccessible(Class<?> caller,
|
||||
Class<?> declaringClass,
|
||||
boolean throwExceptionIfDenied) {
|
||||
Module callerModule = caller.getModule();
|
||||
Module declaringModule = declaringClass.getModule();
|
||||
|
||||
if (callerModule == declaringModule) return true;
|
||||
if (callerModule == Object.class.getModule()) return true;
|
||||
if (!declaringModule.isNamed()) return true;
|
||||
|
||||
String pn = declaringClass.getPackageName();
|
||||
int modifiers;
|
||||
if (this instanceof Executable) {
|
||||
modifiers = ((Executable) this).getModifiers();
|
||||
} else {
|
||||
modifiers = ((Field) this).getModifiers();
|
||||
}
|
||||
|
||||
// class is public and package is exported to caller
|
||||
boolean isClassPublic = Modifier.isPublic(declaringClass.getModifiers());
|
||||
if (isClassPublic && declaringModule.isExported(pn, callerModule)) {
|
||||
// member is public
|
||||
if (Modifier.isPublic(modifiers)) {
|
||||
logIfExportedForIllegalAccess(caller, declaringClass);
|
||||
return true;
|
||||
}
|
||||
|
||||
// member is protected-static
|
||||
if (Modifier.isProtected(modifiers)
|
||||
&& Modifier.isStatic(modifiers)
|
||||
&& isSubclassOf(caller, declaringClass)) {
|
||||
logIfExportedForIllegalAccess(caller, declaringClass);
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
// package is open to caller
|
||||
if (declaringModule.isOpen(pn, callerModule)) {
|
||||
logIfOpenedForIllegalAccess(caller, declaringClass);
|
||||
return true;
|
||||
}
|
||||
|
||||
if (throwExceptionIfDenied) {
|
||||
// not accessible
|
||||
String msg = "Unable to make ";
|
||||
if (this instanceof Field)
|
||||
msg += "field ";
|
||||
msg += this + " accessible: " + declaringModule + " does not \"";
|
||||
if (isClassPublic && Modifier.isPublic(modifiers))
|
||||
msg += "exports";
|
||||
else
|
||||
msg += "opens";
|
||||
msg += " " + pn + "\" to " + callerModule;
|
||||
InaccessibleObjectException e = new InaccessibleObjectException(msg);
|
||||
if (printStackTraceWhenAccessFails()) {
|
||||
e.printStackTrace(System.err);
|
||||
}
|
||||
throw e;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
private boolean isSubclassOf(Class<?> queryClass, Class<?> ofClass) {
|
||||
while (queryClass != null) {
|
||||
if (queryClass == ofClass) {
|
||||
return true;
|
||||
}
|
||||
queryClass = queryClass.getSuperclass();
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
private void logIfOpenedForIllegalAccess(Class<?> caller, Class<?> declaringClass) {
|
||||
Module callerModule = caller.getModule();
|
||||
Module targetModule = declaringClass.getModule();
|
||||
// callerModule is null during early startup
|
||||
if (callerModule != null && !callerModule.isNamed() && targetModule.isNamed()) {
|
||||
IllegalAccessLogger logger = IllegalAccessLogger.illegalAccessLogger();
|
||||
if (logger != null) {
|
||||
logger.logIfOpenedForIllegalAccess(caller, declaringClass, this::toShortString);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private void logIfExportedForIllegalAccess(Class<?> caller, Class<?> declaringClass) {
|
||||
Module callerModule = caller.getModule();
|
||||
Module targetModule = declaringClass.getModule();
|
||||
// callerModule is null during early startup
|
||||
if (callerModule != null && !callerModule.isNamed() && targetModule.isNamed()) {
|
||||
IllegalAccessLogger logger = IllegalAccessLogger.illegalAccessLogger();
|
||||
if (logger != null) {
|
||||
logger.logIfExportedForIllegalAccess(caller, declaringClass, this::toShortString);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a short descriptive string to describe this object in log messages.
|
||||
*/
|
||||
String toShortString() {
|
||||
return toString();
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the value of the {@code accessible} flag for this reflected object.
|
||||
*
|
||||
* @return the value of the object's {@code accessible} flag
|
||||
*
|
||||
* @deprecated
|
||||
* This method is deprecated because its name hints that it checks
|
||||
* if the reflected object is accessible when it actually indicates
|
||||
* if the checks for Java language access control are suppressed.
|
||||
* This method may return {@code false} on a reflected object that is
|
||||
* accessible to the caller. To test if this reflected object is accessible,
|
||||
* it should use {@link #canAccess(Object)}.
|
||||
*
|
||||
* @revised 9
|
||||
* @spec JPMS
|
||||
*/
|
||||
@Deprecated(since="9")
|
||||
public boolean isAccessible() {
|
||||
return override;
|
||||
}
|
||||
|
||||
/**
|
||||
* Test if the caller can access this reflected object. If this reflected
|
||||
* object corresponds to an instance method or field then this method tests
|
||||
* if the caller can access the given {@code obj} with the reflected object.
|
||||
* For instance methods or fields then the {@code obj} argument must be an
|
||||
* instance of the {@link Member#getDeclaringClass() declaring class}. For
|
||||
* static members and constructors then {@code obj} must be {@code null}.
|
||||
*
|
||||
* <p> This method returns {@code true} if the {@code accessible} flag
|
||||
* is set to {@code true}, i.e. the checks for Java language access control
|
||||
* are suppressed, or if the caller can access the member as
|
||||
* specified in <cite>The Java™ Language Specification</cite>,
|
||||
* with the variation noted in the class description. </p>
|
||||
*
|
||||
* @param obj an instance object of the declaring class of this reflected
|
||||
* object if it is an instance method or field
|
||||
*
|
||||
* @return {@code true} if the caller can access this reflected object.
|
||||
*
|
||||
* @throws IllegalArgumentException
|
||||
* <ul>
|
||||
* <li> if this reflected object is a static member or constructor and
|
||||
* the given {@code obj} is non-{@code null}, or </li>
|
||||
* <li> if this reflected object is an instance method or field
|
||||
* and the given {@code obj} is {@code null} or of type
|
||||
* that is not a subclass of the {@link Member#getDeclaringClass()
|
||||
* declaring class} of the member.</li>
|
||||
* </ul>
|
||||
*
|
||||
* @since 9
|
||||
* @spec JPMS
|
||||
* @jls 6.6 Access Control
|
||||
* @see #trySetAccessible
|
||||
* @see #setAccessible(boolean)
|
||||
*/
|
||||
@CallerSensitive
|
||||
public final boolean canAccess(Object obj) {
|
||||
if (!Member.class.isInstance(this)) {
|
||||
return override;
|
||||
}
|
||||
|
||||
Class<?> declaringClass = ((Member) this).getDeclaringClass();
|
||||
int modifiers = ((Member) this).getModifiers();
|
||||
if (!Modifier.isStatic(modifiers) &&
|
||||
(this instanceof Method || this instanceof Field)) {
|
||||
if (obj == null) {
|
||||
throw new IllegalArgumentException("null object for " + this);
|
||||
}
|
||||
// if this object is an instance member, the given object
|
||||
// must be a subclass of the declaring class of this reflected object
|
||||
if (!declaringClass.isAssignableFrom(obj.getClass())) {
|
||||
throw new IllegalArgumentException("object is not an instance of "
|
||||
+ declaringClass.getName());
|
||||
}
|
||||
} else if (obj != null) {
|
||||
throw new IllegalArgumentException("non-null object for " + this);
|
||||
}
|
||||
|
||||
// access check is suppressed
|
||||
if (override) return true;
|
||||
|
||||
Class<?> caller = Reflection.getCallerClass();
|
||||
Class<?> targetClass;
|
||||
if (this instanceof Constructor) {
|
||||
targetClass = declaringClass;
|
||||
} else {
|
||||
targetClass = Modifier.isStatic(modifiers) ? null : obj.getClass();
|
||||
}
|
||||
return verifyAccess(caller, declaringClass, targetClass, modifiers);
|
||||
}
|
||||
|
||||
/**
|
||||
* Constructor: only used by the Java Virtual Machine.
|
||||
*/
|
||||
protected AccessibleObject() {}
|
||||
|
||||
// Indicates whether language-level access checks are overridden
|
||||
// by this object. Initializes to "false". This field is used by
|
||||
// Field, Method, and Constructor.
|
||||
//
|
||||
// NOTE: for security purposes, this field must not be visible
|
||||
// outside this package.
|
||||
boolean override;
|
||||
|
||||
// Reflection factory used by subclasses for creating field,
|
||||
// method, and constructor accessors. Note that this is called
|
||||
// very early in the bootstrapping process.
|
||||
static final ReflectionFactory reflectionFactory =
|
||||
AccessController.doPrivileged(
|
||||
new ReflectionFactory.GetReflectionFactoryAction());
|
||||
|
||||
/**
|
||||
* @throws NullPointerException {@inheritDoc}
|
||||
* @since 1.5
|
||||
*/
|
||||
public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
|
||||
throw new AssertionError("All subclasses should override this method");
|
||||
}
|
||||
|
||||
/**
|
||||
* {@inheritDoc}
|
||||
* @throws NullPointerException {@inheritDoc}
|
||||
* @since 1.5
|
||||
*/
|
||||
@Override
|
||||
public boolean isAnnotationPresent(Class<? extends Annotation> annotationClass) {
|
||||
return AnnotatedElement.super.isAnnotationPresent(annotationClass);
|
||||
}
|
||||
|
||||
/**
|
||||
* @throws NullPointerException {@inheritDoc}
|
||||
* @since 1.8
|
||||
*/
|
||||
@Override
|
||||
public <T extends Annotation> T[] getAnnotationsByType(Class<T> annotationClass) {
|
||||
throw new AssertionError("All subclasses should override this method");
|
||||
}
|
||||
|
||||
/**
|
||||
* @since 1.5
|
||||
*/
|
||||
public Annotation[] getAnnotations() {
|
||||
return getDeclaredAnnotations();
|
||||
}
|
||||
|
||||
/**
|
||||
* @throws NullPointerException {@inheritDoc}
|
||||
* @since 1.8
|
||||
*/
|
||||
@Override
|
||||
public <T extends Annotation> T getDeclaredAnnotation(Class<T> annotationClass) {
|
||||
// Only annotations on classes are inherited, for all other
|
||||
// objects getDeclaredAnnotation is the same as
|
||||
// getAnnotation.
|
||||
return getAnnotation(annotationClass);
|
||||
}
|
||||
|
||||
/**
|
||||
* @throws NullPointerException {@inheritDoc}
|
||||
* @since 1.8
|
||||
*/
|
||||
@Override
|
||||
public <T extends Annotation> T[] getDeclaredAnnotationsByType(Class<T> annotationClass) {
|
||||
// Only annotations on classes are inherited, for all other
|
||||
// objects getDeclaredAnnotationsByType is the same as
|
||||
// getAnnotationsByType.
|
||||
return getAnnotationsByType(annotationClass);
|
||||
}
|
||||
|
||||
/**
|
||||
* @since 1.5
|
||||
*/
|
||||
public Annotation[] getDeclaredAnnotations() {
|
||||
throw new AssertionError("All subclasses should override this method");
|
||||
}
|
||||
|
||||
|
||||
// Shared access checking logic.
|
||||
|
||||
// For non-public members or members in package-private classes,
|
||||
// it is necessary to perform somewhat expensive security checks.
|
||||
// If the security check succeeds for a given class, it will
|
||||
// always succeed (it is not affected by the granting or revoking
|
||||
// of permissions); we speed up the check in the common case by
|
||||
// remembering the last Class for which the check succeeded.
|
||||
//
|
||||
// The simple security check for Constructor is to see if
|
||||
// the caller has already been seen, verified, and cached.
|
||||
// (See also Class.newInstance(), which uses a similar method.)
|
||||
//
|
||||
// A more complicated security check cache is needed for Method and Field
|
||||
// The cache can be either null (empty cache), a 2-array of {caller,targetClass},
|
||||
// or a caller (with targetClass implicitly equal to memberClass).
|
||||
// In the 2-array case, the targetClass is always different from the memberClass.
|
||||
volatile Object securityCheckCache;
|
||||
|
||||
final void checkAccess(Class<?> caller, Class<?> memberClass,
|
||||
Class<?> targetClass, int modifiers)
|
||||
throws IllegalAccessException
|
||||
{
|
||||
if (!verifyAccess(caller, memberClass, targetClass, modifiers)) {
|
||||
IllegalAccessException e = Reflection.newIllegalAccessException(
|
||||
caller, memberClass, targetClass, modifiers);
|
||||
if (printStackTraceWhenAccessFails()) {
|
||||
e.printStackTrace(System.err);
|
||||
}
|
||||
throw e;
|
||||
}
|
||||
}
|
||||
|
||||
final boolean verifyAccess(Class<?> caller, Class<?> memberClass,
|
||||
Class<?> targetClass, int modifiers)
|
||||
{
|
||||
if (caller == memberClass) { // quick check
|
||||
return true; // ACCESS IS OK
|
||||
}
|
||||
Object cache = securityCheckCache; // read volatile
|
||||
if (targetClass != null // instance member or constructor
|
||||
&& Modifier.isProtected(modifiers)
|
||||
&& targetClass != memberClass) {
|
||||
// Must match a 2-list of { caller, targetClass }.
|
||||
if (cache instanceof Class[]) {
|
||||
Class<?>[] cache2 = (Class<?>[]) cache;
|
||||
if (cache2[1] == targetClass &&
|
||||
cache2[0] == caller) {
|
||||
return true; // ACCESS IS OK
|
||||
}
|
||||
// (Test cache[1] first since range check for [1]
|
||||
// subsumes range check for [0].)
|
||||
}
|
||||
} else if (cache == caller) {
|
||||
// Non-protected case (or targetClass == memberClass or static member).
|
||||
return true; // ACCESS IS OK
|
||||
}
|
||||
|
||||
// If no return, fall through to the slow path.
|
||||
return slowVerifyAccess(caller, memberClass, targetClass, modifiers);
|
||||
}
|
||||
|
||||
// Keep all this slow stuff out of line:
|
||||
private boolean slowVerifyAccess(Class<?> caller, Class<?> memberClass,
|
||||
Class<?> targetClass, int modifiers)
|
||||
{
|
||||
if (!Reflection.verifyMemberAccess(caller, memberClass, targetClass, modifiers)) {
|
||||
// access denied
|
||||
return false;
|
||||
}
|
||||
|
||||
// access okay
|
||||
logIfExportedForIllegalAccess(caller, memberClass);
|
||||
|
||||
// Success: Update the cache.
|
||||
Object cache = (targetClass != null
|
||||
&& Modifier.isProtected(modifiers)
|
||||
&& targetClass != memberClass)
|
||||
? new Class<?>[] { caller, targetClass }
|
||||
: caller;
|
||||
|
||||
// Note: The two cache elements are not volatile,
|
||||
// but they are effectively final. The Java memory model
|
||||
// guarantees that the initializing stores for the cache
|
||||
// elements will occur before the volatile write.
|
||||
securityCheckCache = cache; // write volatile
|
||||
return true;
|
||||
}
|
||||
|
||||
// true to print a stack trace when access fails
|
||||
private static volatile boolean printStackWhenAccessFails;
|
||||
|
||||
// true if printStack* values are initialized
|
||||
private static volatile boolean printStackPropertiesSet;
|
||||
|
||||
/**
|
||||
* Returns true if a stack trace should be printed when access fails.
|
||||
*/
|
||||
private static boolean printStackTraceWhenAccessFails() {
|
||||
if (!printStackPropertiesSet && VM.initLevel() >= 1) {
|
||||
String s = GetPropertyAction.privilegedGetProperty(
|
||||
"sun.reflect.debugModuleAccessChecks");
|
||||
if (s != null) {
|
||||
printStackWhenAccessFails = !s.equalsIgnoreCase("false");
|
||||
}
|
||||
printStackPropertiesSet = true;
|
||||
}
|
||||
return printStackWhenAccessFails;
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue