org.apache.commons.beanutils
Class BasicDynaClass

java.lang.Object
  org.apache.commons.beanutils.BasicDynaClass

All Implemented Interfaces:

Serializable, DynaClass

Direct Known Subclasses:

LazyDynaClass

public class BasicDynaClass
extends Object
implements DynaClass, Serializable

Minimal implementation of the DynaClass interface. Can be used as a convenience base class for more sophisticated implementations.

*

IMPLEMENTATION NOTE - The DynaBean implementation class supplied to our constructor MUST have a one-argument constructor of its own that accepts a DynaClass. This is used to associate the DynaBean instance with this DynaClass.

Version:

$Revision: 556229 $ $Date: 2007-07-14 07:11:19 +0100 (Sat, 14 Jul 2007) $

Author:

Craig McClanahan

See Also:

Serialized Form

Field Summary

protected Constructor	constructor The constructor of the dynaBeanClass that we will use for creating new instances.
protected static Class[]	constructorTypes The method signature of the constructor we will use to create new DynaBean instances.
protected Object[]	constructorValues The argument values to be passed to the constructore we will use to create new DynaBean instances.
protected Class	dynaBeanClass The DynaBean implementation class we will use for creating new instances.
protected String	name The "name" of this DynaBean 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

BasicDynaClass()
Construct a new BasicDynaClass with default parameters.

BasicDynaClass(String name, Class dynaBeanClass)
Construct a new BasicDynaClass with the specified parameters.

BasicDynaClass(String name, Class dynaBeanClass, DynaProperty[] properties)
Construct a new BasicDynaClass with the specified parameters.

Method Summary

Class	getDynaBeanClass() Return the Class object we will use to create new instances in the newInstance() method.
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.
DynaBean	newInstance() Instantiate and return a new DynaBean instance, associated with this DynaClass.
protected void	setDynaBeanClass(Class dynaBeanClass) Set the Class object we will use to create new instances in the newInstance() method.
protected void	setProperties(DynaProperty[] properties) Set the list of dynamic properties supported by this DynaClass.

Methods inherited from class java.lang.Object

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

Field Detail

constructor

protected transient Constructor constructor

The constructor of the dynaBeanClass that we will use for creating new instances.

constructorTypes

protected static Class[] constructorTypes

The method signature of the constructor we will use to create new DynaBean instances.

constructorValues

protected Object[] constructorValues

The argument values to be passed to the constructore we will use to create new DynaBean instances.

dynaBeanClass

protected Class dynaBeanClass

The DynaBean implementation class we will use for creating new instances.

name

protected String name

The "name" of this DynaBean 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 Detail

BasicDynaClass

public BasicDynaClass()

Construct a new BasicDynaClass with default parameters.

BasicDynaClass

public BasicDynaClass(String name,
                      Class dynaBeanClass)

Construct a new BasicDynaClass with the specified parameters.

Parameters:

name - Name of this DynaBean class

dynaBeanClass - The implementation class for new instances

BasicDynaClass

public BasicDynaClass(String name,
                      Class dynaBeanClass,
                      DynaProperty[] properties)

Construct a new BasicDynaClass with the specified parameters.

Parameters:

name - Name of this DynaBean class

dynaBeanClass - The implementation class for new intances

properties - Property descriptors for the supported properties

Method Detail

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

Returns:

the name of the 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:

The descriptor for the specified property

Throws:

IllegalArgumentException - if no property name is specified

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

Returns:

the set of properties for this DynaClass

newInstance

public DynaBean newInstance()
                     throws IllegalAccessException,
                            InstantiationException

Instantiate and return a new DynaBean instance, associated with this DynaClass.

Specified by:

newInstance in interface DynaClass

Returns:

A new DynaBean 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

getDynaBeanClass

public Class getDynaBeanClass()

Return the Class object we will use to create new instances in the newInstance() method. This Class MUST implement the DynaBean interface.

Returns:

The class of the DynaBean

setDynaBeanClass

protected void setDynaBeanClass(Class dynaBeanClass)

Set the Class object we will use to create new instances in the newInstance() method. This Class MUST implement the DynaBean interface.

Parameters:

dynaBeanClass - The new Class object

Throws:

IllegalArgumentException - if the specified Class does not implement the DynaBean interface

setProperties

protected void setProperties(DynaProperty[] properties)

Set the list of dynamic properties supported by this DynaClass.

Parameters:

properties - List of dynamic properties to be supported