? WrapDynaClass

java.lang.Object
org.apache.commons.beanutils.WrapDynaClass
????????:
DynaClass

public class WrapDynaClass extends Object implements DynaClass

Implementation of DynaClass for DynaBeans that wrap standard JavaBean instances.

It is suggested that this class should not usually need to be used directly to create new WrapDynaBean instances. It's usually better to call the WrapDynaBean constructor directly. For example:

   Object javaBean = ...;
   DynaBean wrapper = new WrapDynaBean(javaBean);
 

??:
$Id$
  • ??????

    • beanClass

      @Deprecated protected Class<?> beanClass
      ????
      No longer initialized, use getBeanClass() method instead
      The JavaBean Class which is represented by this WrapDynaClass.
    • descriptors

      The set of PropertyDescriptors for this bean class.
    • descriptorsMap

      The set of PropertyDescriptors for this bean class, keyed by the property name. Individual descriptor instances will be the same instances as those in the descriptors list.
    • properties

      protected DynaProperty[] properties
      The set of dynamic properties that are part of this DynaClass.
    • propertiesMap

      The set of dynamic properties that are part of this DynaClass, keyed by the property name. Individual descriptor instances will be the same instances as those in the properties list.
    • dynaClasses

      ????
      The dynaClasses Map will be removed in a subsequent release
      The set of WrapDynaClass instances that have ever been created, keyed by the underlying bean Class. The keys to this map are Class objects, and the values are corresponding WrapDynaClass objects.

      This static variable is safe even when this code is deployed via a shared classloader because it is keyed via a Class object. The same class loaded via two different classloaders will result in different entries in this map.

      Note, however, that this HashMap can result in a memory leak. When this class is in a shared classloader it will retain references to classes loaded via a webapp classloader even after the webapp has been undeployed. That will prevent the entire classloader and all the classes it refers to and all their static members from being freed. !!!!!!!!!!!! PLEASE NOTE !!!!!!!!!!!! ************* THE FOLLOWING IS A NASTY HACK TO SO THAT BEANUTILS REMAINS BINARY COMPATIBLE WITH PREVIOUS RELEASES. There are two issues here: 1) Memory Issues: The static HashMap caused memory problems (See BEANUTILS-59) to resolve this it has been moved into a ContextClassLoaderLocal instance (named CLASSLOADER_CACHE above) which holds one copy per ClassLoader in a WeakHashMap. 2) Binary Compatibility: As the "dynaClasses" static HashMap is "protected" removing it breaks BeanUtils binary compatibility with previous versions. To resolve this all the methods have been overriden to delegate to the Map for the ClassLoader in the ContextClassLoaderLocal.

  • ??????

    • getBeanClass

      protected Class<?> getBeanClass()
      Return the class of the underlying wrapped bean.
      ??:
      the class of the underlying wrapped bean
      ???????:
      1.8.0
    • getName

      public String getName()
      Return the name of this DynaClass (analogous to the getName() method of java.lang.Class</code), which allows the same DynaClass implementation class to support different dynamic classes, with different sets of properties.
      ???:
      getName ???? DynaClass
      ??:
      the name of the DynaClass
    • getDynaProperty

      Return a property descriptor for the specified property, if it exists; otherwise, return null.
      ???:
      getDynaProperty ???? DynaClass
      ??:
      name - Name of the dynamic property for which a descriptor is requested
      ??:
      The descriptor for the specified property
      ??:
      IllegalArgumentException - if no property name is specified
    • getDynaProperties

      Return an array of ProperyDescriptors for the properties currently defined in this DynaClass. If no properties are defined, a zero-length array will be returned.

      FIXME - Should we really be implementing getBeanInfo() instead, which returns property descriptors and a bunch of other stuff?

      ???:
      getDynaProperties ???? DynaClass
      ??:
      the set of properties for this DynaClass
    • newInstance

      Instantiates a new standard JavaBean instance associated with this DynaClass and return it wrapped in a new WrapDynaBean instance. NOTE the JavaBean should have a no argument constructor.

      NOTE - Most common use cases should not need to use this method. It is usually better to create new WrapDynaBean instances by calling its constructor. For example:

         Object javaBean = ...;
         DynaBean wrapper = new WrapDynaBean(javaBean);
       

      (This method is needed for some kinds of DynaBean framework.)

      ???:
      newInstance ???? DynaClass
      ??:
      A new DynaBean instance
      ??:
      IllegalAccessException - if the Class or the appropriate constructor is not accessible
      InstantiationException - if this Class represents an abstract class, an array class, a primitive type, or void; or if instantiation fails for some other reason
    • getPropertyDescriptor

      Return the PropertyDescriptor for the specified property name, if any; otherwise return null.
      ??:
      name - Name of the property to be retrieved
      ??:
      The descriptor for the specified property
    • clear

      public static void clear()
      Clear our cache of WrapDynaClass instances.
    • createDynaClass

      public static WrapDynaClass createDynaClass(Class<?> beanClass)
      Create (if necessary) and return a new WrapDynaClass instance for the specified bean class.
      ??:
      beanClass - Bean class for which a WrapDynaClass is requested
      ??:
      A new Wrap DynaClass
    • createDynaClass

      public static WrapDynaClass createDynaClass(Class<?> beanClass, PropertyUtilsBean pu)
      Create (if necessary) and return a new WrapDynaClass instance for the specified bean class using the given PropertyUtilsBean instance for introspection. Using this method a specially configured PropertyUtilsBean instance can be hooked into the introspection mechanism of the managed bean. The argument is optional; if no PropertyUtilsBean object is provided, the default instance is used.
      ??:
      beanClass - Bean class for which a WrapDynaClass is requested
      pu - the optional PropertyUtilsBean to be used for introspection
      ??:
      A new Wrap DynaClass
      ???????:
      1.9
    • getPropertyUtilsBean

      Returns the PropertyUtilsBean instance associated with this class. This bean is used for introspection.
      ??:
      the associated PropertyUtilsBean instance
      ???????:
      1.9
    • introspect

      protected void introspect()
      Introspect our bean class to identify the supported properties.