java.lang.reflect.AccessibleObject Maven / Gradle / Ivy

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This work corresponds to the API signatures of JSR 219: Foundation Profile 1.1. In the event of a discrepency between this work and the JSR 219 specification, which is available at http://www.jcp.org/en/jsr/detail?id=219, the latter takes precedence. */ package java.lang.reflect; /** * 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. * * @see Field * @see Method * @see Constructor * @see ReflectPermission * * @since 1.2 */ public class AccessibleObject { /** * Constructor: only used by the Java Virtual Machine. */ protected AccessibleObject() { } /** * Convenience method to set the 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 {@link Constructor} object for the class {@link * java.lang.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. * * @param array the array of AccessibleObjects * @param flag the new value for the accessible flag * in each object * @throws SecurityException if the request is denied. * @see SecurityManager#checkPermission * @see java.lang.RuntimePermission */ public static void setAccessible(AccessibleObject[] array, boolean flag) throws SecurityException { } /** * Set the 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 {@link Constructor} object for * the class {@link java.lang.Class}). * *