public class AccessibleObject extends Object implements AnnotatedElement
Setting the accessible
flag in a reflected object
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.
By default, a reflected object is not accessible.
Field
,
Method
,
Constructor
,
ReflectPermission
Modifier | Constructor and Description |
---|---|
protected |
AccessibleObject()
Constructor: only used by the Java Virtual Machine.
|
Modifier and Type | Method and Description |
---|---|
<T extends Annotation> |
getAnnotation(Class<T> annotationClass)
Returns this element's annotation for the specified type if
such an annotation is present, else null.
|
Annotation[] |
getAnnotations()
Returns all annotations present on this element.
|
Annotation[] |
getDeclaredAnnotations()
Returns all annotations that are directly present on this
element.
|
boolean |
isAccessible()
Get the value of the
accessible flag for this object. |
boolean |
isAnnotationPresent(Class<? extends Annotation> annotationClass)
Returns true if an annotation for the specified type
is present on this element, else false.
|
static void |
setAccessible(AccessibleObject[] array,
boolean flag)
Convenience method to set the
accessible flag for an
array of objects with a single security check (for efficiency). |
void |
setAccessible(boolean flag)
Set the
accessible flag for this object to
the indicated boolean value. |
protected AccessibleObject()
public static void setAccessible(AccessibleObject[] array, boolean flag) throws SecurityException
accessible
flag for an
array of objects with a single security check (for efficiency).
First, if there is a security manager, its
checkPermission
method is called with a
ReflectPermission("suppressAccessChecks")
permission.
A SecurityException
is raised if flag
is
true
but accessibility of any of the elements of the input
array
may not be changed (for example, if the element
object is a Constructor
object for the class Class
). In the event of such a SecurityException, the
accessibility of objects is set to flag
for array elements
upto (and excluding) the element for which the exception occurred; the
accessibility of elements beyond (and including) the element for which
the exception occurred is unchanged.
array
- the array of AccessibleObjectsflag
- the new value for the accessible
flag
in each objectSecurityException
- if the request is denied.SecurityManager.checkPermission(java.security.Permission)
,
RuntimePermission
public void setAccessible(boolean flag) throws SecurityException
accessible
flag for this object to
the indicated boolean value. A value of true
indicates that
the reflected object should suppress Java language access
checking when it is used. A value of false
indicates
that the reflected object should enforce Java language access checks.
First, if there is a security manager, its
checkPermission
method is called with a
ReflectPermission("suppressAccessChecks")
permission.
A SecurityException
is raised if flag
is
true
but accessibility of this object may not be changed
(for example, if this element object is a Constructor
object for
the class Class
).
A SecurityException
is raised if this object is a Constructor
object for the class
java.lang.Class
, and flag
is true.
flag
- the new value for the accessible
flagSecurityException
- if the request is denied.SecurityManager.checkPermission(java.security.Permission)
,
RuntimePermission
public boolean isAccessible()
accessible
flag for this object.accessible
flagpublic <T extends Annotation> T getAnnotation(Class<T> annotationClass)
AnnotatedElement
getAnnotation
in interface AnnotatedElement
annotationClass
- the Class object corresponding to the
annotation typeNullPointerException
- if the given annotation class is nullpublic boolean isAnnotationPresent(Class<? extends Annotation> annotationClass)
AnnotatedElement
isAnnotationPresent
in interface AnnotatedElement
annotationClass
- the Class object corresponding to the
annotation typeNullPointerException
- if the given annotation class is nullpublic Annotation[] getAnnotations()
AnnotatedElement
getAnnotations
in interface AnnotatedElement
public Annotation[] getDeclaredAnnotations()
AnnotatedElement
getDeclaredAnnotations
in interface AnnotatedElement
Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2020, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.
Scripting on this page tracks web page traffic, but does not change the content in any way.