org.displaytag.util
Class LookupUtil

java.lang.Object
  org.displaytag.util.LookupUtil

public final class LookupUtil

extends java.lang.Object

Utility class with methods for object and properties retrieving.

Version:

$Revision: 1.13 $ ($Author: fgiust $)

Author:

Fabrizio Giustina

Method Summary

static java.lang.Object	getBeanProperty(java.lang.Object bean, java.lang.String name) Returns the value of a property in the given bean.
static java.lang.Object	getBeanValue(javax.servlet.jsp.PageContext pageContext, java.lang.String beanAndPropertyName, int scope) Read an object from the pagecontext with the specified scope and eventually lookup a property in it.

Methods inherited from class java.lang.Object

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

Method Detail

getBeanValue

public static java.lang.Object getBeanValue(javax.servlet.jsp.PageContext pageContext,
                                            java.lang.String beanAndPropertyName,
                                            int scope)
                                     throws ObjectLookupException

Read an object from the pagecontext with the specified scope and eventually lookup a property in it.

Parameters:

pageContext - PageContext

beanAndPropertyName - String expression with bean name and attributes

scope - One of the following values:

• PageContext.PAGE_SCOPE
• PageContext.REQUEST_SCOPE
• PageContext.SESSION_SCOPE
• PageContext.APPLICATION_SCOPE

Returns:

Object

Throws:

ObjectLookupException - for errors while retrieving a property in the bean

getBeanProperty

public static java.lang.Object getBeanProperty(java.lang.Object bean,
                                               java.lang.String name)
                                        throws ObjectLookupException

Returns the value of a property in the given bean.

This method is a modificated version from commons-beanutils PropertyUtils.getProperty(). It allows intermediate nulls in expression without throwing exception (es. it doesn't throw an exception for the property object.date.time if date is null)

Parameters:

bean - javabean

name - name of the property to read from the javabean

Returns:

Object

Throws:

ObjectLookupException - for errors while retrieving a property in the bean