org.apache.struts.action
Class DynaActionFormClass

java.lang.Object
  org.apache.struts.action.DynaActionFormClass

All Implemented Interfaces:

Serializable, DynaClass

public class DynaActionFormClass
extends Object
implements DynaClass, Serializable

Implementation of DynaClass for DynaActionForm classes that allow developers to define ActionForms without having to individually code all of the classes. NOTE - This class is only used in the internal implementation of dynamic action form beans. Application developers never need to consult this documentation.

Since:

Struts 1.1

Version:

$Rev: 471754 $ $Date: 2006-01-17 07:26:20 -0500 (Tue, 17 Jan 2006) $

See Also:

Serialized Form

Field Summary

protected Class	beanClass The DynaActionForm implementation Class which we will use to create new bean instances.
protected FormBeanConfig	config The form bean configuration information for this class.
protected String	name The "dynamic class name" for this DynaClass.
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

DynaActionFormClass(FormBeanConfig config)
Construct a new DynaActionFormClass for the specified form bean configuration.

Method Summary

static DynaActionFormClass	createDynaActionFormClass(FormBeanConfig config) Return the DynaActionFormClass instance for the specified form bean configuration instance.
protected Class	getBeanClass() Return the implementation class we are using to construct new instances, re-introspecting our FormBeanConfig if necessary (that is, after being deserialized, since beanClass is marked transient).
DynaProperty[]	getDynaProperties() Return an array of DynaPropertys 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.Class, which allows the same DynaClass implementation class to support different dynamic classes, with different sets of properties.
protected void	introspect(FormBeanConfig config) Introspect our form bean configuration to identify the supported properties.
DynaBean	newInstance() Instantiate and return a new DynaActionForm instance, associated with this DynaActionFormClass.
String	toString() Render a String representation of this object.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

beanClass

protected transient Class beanClass

The DynaActionForm implementation Class which we will use to create new bean instances.

config

protected FormBeanConfig config

The form bean configuration information for this class.

name

protected String name

The "dynamic class name" for this DynaClass.

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 Detail

DynaActionFormClass

public DynaActionFormClass(FormBeanConfig config)

Construct a new DynaActionFormClass for the specified form bean configuration. This constructor is private; DynaActionFormClass instances will be created as needed via calls to the static createDynaActionFormClass() method.

Parameters:

config - The FormBeanConfig instance describing the properties of the bean to be created

Throws:

IllegalArgumentException - if the bean implementation class specified in the configuration is not DynaActionForm (or a subclass of DynaActionForm)

Method Detail

getName

public String getName()

Return the name of this DynaClass (analogous to the getName() method of java.lang.Class, which allows the same DynaClass implementation class to support different dynamic classes, with different sets of properties.

Specified by:

getName in interface DynaClass

Returns:

The name of this 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

Returns:

A property descriptor for the specified property.

Throws:

IllegalArgumentException - if no property name is specified

getDynaProperties

public DynaProperty[] getDynaProperties()

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

Specified by:

getDynaProperties in interface DynaClass

Returns:

An array of property instances for this class.

newInstance

public DynaBean newInstance()
                     throws IllegalAccessException,
                            InstantiationException

Instantiate and return a new DynaActionForm instance, associated with this DynaActionFormClass. The properties of the returned DynaActionForm will have been initialized to the default values specified in the form bean configuration information.

Specified by:

newInstance in interface DynaClass

Returns:

A new DynaActionForm instance.

Throws:

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

toString

public String toString()

Render a String representation of this object.

Overrides:

toString in class Object

Returns:

The string representation of this instance.

createDynaActionFormClass

public static DynaActionFormClass createDynaActionFormClass(FormBeanConfig config)

Return the DynaActionFormClass instance for the specified form bean configuration instance.

Parameters:

config - The config for which the class should be created.

Returns:

The instance for the specified form bean config.

getBeanClass

protected Class getBeanClass()

Return the implementation class we are using to construct new instances, re-introspecting our FormBeanConfig if necessary (that is, after being deserialized, since beanClass is marked transient).

Returns:

The implementation class used to construct new instances.

introspect

protected void introspect(FormBeanConfig config)

Introspect our form bean configuration to identify the supported properties.

Parameters:

config - The FormBeanConfig instance describing the properties of the bean to be created

Throws:

IllegalArgumentException - if the bean implementation class specified in the configuration is not DynaActionForm (or a subclass of DynaActionForm)