java.lang.Object java.lang.reflect.AccessibleObject
The AccessibleObject class is the base class for Field, Method and Constructor objects. It provides the ability to flag a reflected object as suppressing default Java language access control checks when it is used. The access checks--for public, default (package) access, protected, and private members--are performed when Fields, Methods or Constructors are used to set or get fields, to invoke methods, or to create and initialize new instances of classes, respectively.
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.
Constructor Summary | |
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protected |
AccessibleObject
() Constructor: only used by the Java Virtual Machine. |
Method Summary | ||
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getAnnotation
(
Class
<T> annotationClass)
Returns this element's annotation for the specified type if such an annotation is present, else null. |
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java.lang.annotation.Annotation[] |
getAnnotations
()
Returns all annotations present on this element. |
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java.lang.annotation.Annotation[] |
getDeclaredAnnotations
()
Returns all annotations that are directly present on this element. |
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boolean |
isAccessible
() Get the value of the accessible flag for this object. |
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boolean |
isAnnotationPresent
(
Class
Returns true if an annotation for the specified type is present on this element, else false. |
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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). |
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void |
setAccessible
(boolean flag) Set the accessible flag for this object to the indicated boolean value. |
Methods inherited from class java.lang. Object |
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clone , equals , finalize , getClass , hashCode , notify , notifyAll , toString , wait , wait , wait |
Constructor Detail |
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protected AccessibleObject()
Method Detail |
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public static void setAccessible(AccessibleObject[] array, boolean flag) throws SecurityException
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 accessiblity of objects is set to flag for array elements upto (and excluding) the element for which the exception occurred; the accessiblity of elements beyond (and including) the element for which the exception occurred is unchanged.
public void setAccessible(boolean flag) throws SecurityException
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.
public boolean isAccessible()
public <T extends java.lang.annotation.Annotation> T getAnnotation ( Class<T> annotationClass)
public boolean isAnnotationPresent ( Class<? extends java.lang.annotation.Annotation> annotationClass)
public java.lang.annotation.Annotation[] getAnnotations ()
public java.lang.annotation.Annotation[] getDeclaredAnnotations ()