org.apache.shale.util
Class PropertyHelper

java.lang.Object
  org.apache.shale.util.PropertyHelper

public class PropertyHelper
extends Object

Helper class to provide access to the properties of JavaBeans. This implementation is stateless and maintains no cached information, so instances may be freely created and destroyed, with no side effects (unless there are side effects from caching inside the JDK itself).

$Id: PropertyHelper.java 464373 2006-10-16 04:21:54Z rahul $

Since:

1.0.1

Constructor Summary

PropertyHelper()

Method Summary

Class	getType(Object bean, String name) Return the type of the specified property on the underlying bean class.
Object	getValue(Object bean, String name) Return the value of the specified property from the specified bean.
boolean	isReadOnly(Object bean, String name) Return true if the specified property is read only on the underlying bean class.
void	setValue(Object bean, String name, Object value) Set the specified value on the specified property of the specified bean.

Methods inherited from class java.lang.Object

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

Constructor Detail

PropertyHelper

public PropertyHelper()

Method Detail

getValue

public Object getValue(Object bean,
                       String name)

Return the value of the specified property from the specified bean.

Parameters:

bean - Bean whose property is to be retrieved

name - Name of the property to get

Throws:

javax.faces.el.PropertyNotFoundException - if the bean class does not have a property with the specified name, or if the property is write only

javax.faces.el.EvaluationException - if an exception occurs while retrieving the property value

isReadOnly

public boolean isReadOnly(Object bean,
                          String name)

Return true if the specified property is read only on the underlying bean class.

Parameters:

bean - Bean whose property is to be checked

name - Name of the property to check

Throws:

javax.faces.el.PropertyNotFoundException - if the bean class does not have a property with the specified name, or if the property is write only

javax.faces.el.EvaluationException - if an exception occurs while checking the read only status

getType

public Class getType(Object bean,
                     String name)

Return the type of the specified property on the underlying bean class.

Parameters:

bean - Bean whose property is to be analyzed

name - Name of the property to return the type of

Throws:

javax.faces.el.PropertyNotFoundException - if the bean class does not have a property with the specified name

javax.faces.el.EvaluationException - if an exception occurs while retrieving the property type

setValue

public void setValue(Object bean,
                     String name,
                     Object value)

Set the specified value on the specified property of the specified bean.

Parameters:

bean - Bean whose property is to be set

name - Name of the property to be set

value - New value for this property

Throws:

javax.faces.el.PropertyNotFoundException - if the bean class does not have a property with the specified name, or if the property is read only

javax.faces.el.EvaluationException - if an exception occurs while setting the property value