org.apache.commons.beanutils

Class WrapDynaClass

Implemented Interfaces:
DynaClass

public class WrapDynaClass
extends java.lang.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);
 

Version:
$Revision: 1.8 $ $Date: 2004/02/28 13:18:34 $
Author:
Craig McClanahan

Field Summary

protected Class
beanClass
The JavaBean Class which is represented by this WrapDynaClass.
protected PropertyDescriptor[]
descriptors
The set of PropertyDescriptors for this bean class.
protected HashMap
descriptorsMap
The set of PropertyDescriptors for this bean class, keyed by the property name.
protected static HashMap
dynaClasses
The set of WrapDynaClass instances that have ever been created, keyed by the underlying bean Class.
protected DynaProperty[]
properties
The set of dynamic properties that are part of this DynaClass.
protected HashMap
propertiesMap
The set of dynamic properties that are part of this DynaClass, keyed by the property name.

Constructor Summary

WrapDynaClass(Class beanClass)
Construct a new WrapDynaClass for the specified JavaBean class.

Method Summary

static void
clear()
Clear our cache of WrapDynaClass instances.
static WrapDynaClass
createDynaClass(Class beanClass)
Create (if necessary) and return a new WrapDynaClass instance for the specified bean class.
DynaProperty[]
getDynaProperties()
Return an array of ProperyDescriptors for the properties currently defined in this DynaClass.
DynaProperty
getDynaProperty(String name)
Return a property descriptor for the specified property, if it exists; otherwise, return null.
String
getName()
Return the name of this DynaClass (analogous to the getName() method of java.lang.ClassDynaClass implementation class to support different dynamic classes, with different sets of properties.
PropertyDescriptor
getPropertyDescriptor(String name)
Return the PropertyDescriptor for the specified property name, if any; otherwise return null.
protected void
introspect()
Introspect our bean class to identify the supported properties.
DynaBean
newInstance()
Instantiates a new standard JavaBean instance associated with this DynaClass and return it wrapped in a new WrapDynaBean instance.

Field Details

beanClass

protected Class beanClass
The JavaBean Class which is represented by this WrapDynaClass.

descriptors

protected PropertyDescriptor[] descriptors
The set of PropertyDescriptors for this bean class.

descriptorsMap

protected HashMap 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.

dynaClasses

protected static HashMap dynaClasses
The set of WrapDynaClass instances that have ever been created, keyed by the underlying bean Class.

properties

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

propertiesMap

protected HashMap 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.

Constructor Details

WrapDynaClass

private WrapDynaClass(Class beanClass)
Construct a new WrapDynaClass for the specified JavaBean class. This constructor is private; WrapDynaClass instances will be created as needed via calls to the createDynaClass(Class) method.
Parameters:
beanClass - JavaBean class to be introspected around

Method Details

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.
Parameters:
beanClass - Bean class for which a WrapDynaClass is requested

getDynaProperties

public DynaProperty[] 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?

Specified by:
getDynaProperties in interface DynaClass

getDynaProperty

public DynaProperty getDynaProperty(String name)
Return a property descriptor for the specified property, if it exists; otherwise, return null.
Specified by:
getDynaProperty in interface DynaClass
Parameters:
name - Name of the dynamic property for which a descriptor is requested

getName

public String getName()
Return the name of this DynaClass (analogous to the getName() method of java.lang.ClassDynaClass implementation class to support different dynamic classes, with different sets of properties.
Specified by:
getName in interface DynaClass

getPropertyDescriptor

public PropertyDescriptor getPropertyDescriptor(String name)
Return the PropertyDescriptor for the specified property name, if any; otherwise return null.
Parameters:
name - Name of the property to be retrieved

introspect

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

newInstance

public DynaBean newInstance()
            throws IllegalAccessException,
                   InstantiationException
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.)

Specified by:
newInstance in interface DynaClass

Copyright (c) 2001-2004 - Apache Software Foundation