com.objectwave.utility
Class ReflectiveHelper

java.lang.Object
  |
  +--com.objectwave.utility.ReflectiveHelper

public class ReflectiveHelper

extends java.lang.Object

A collection of functions that may assist when working with java's reflective capabilities.

Version:

$Id: ReflectiveHelper.java,v 2.1 2001/08/02 16:27:11 dave_hoag Exp $

Author:

dhoag

Constructor Summary

ReflectiveHelper()
Constructor for the ReflectiveHelper object

Method Summary

protected java.lang.reflect.Method	findMethod(java.lang.String fieldName, java.lang.Class targetClass) Find the method called get so we can set the value.
protected java.lang.reflect.Method	findMethod(java.lang.String fieldName, java.lang.Class fieldType, java.lang.Class targetClass) Find the method called set so we can set the value.
java.lang.Object	getValue(java.lang.reflect.Field field, java.lang.Object obj) Use the getMethod to get the value of the provided field.
protected void	initialize() Establish the object formatter for converting string properties to their actuall class type.
void	setValue(java.lang.reflect.Field field, java.lang.Object valueToSet, java.lang.Object obj) Use the setMethod to set a field property.
void	setValue(java.lang.reflect.Field field, java.lang.String valueToSet, java.lang.Object obj) Use the setMethod to set a field property.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReflectiveHelper

public ReflectiveHelper()

Constructor for the ReflectiveHelper object

Method Detail

setValue

public void setValue(java.lang.reflect.Field field,
                     java.lang.String valueToSet,
                     java.lang.Object obj)
              throws java.lang.reflect.InvocationTargetException,
                     java.lang.IllegalAccessException

Use the setMethod to set a field property. The property is originally a string and it is converted to the correct field type before the set method is called. If no set method exists, nothing is done.

Parameters:

valueToSet - String The value to set.

field - The field that will ultimately have the set value.

obj - The object upon which the setProperty method will be called.

Throws:

java.lang.reflect.InvocationTargetException

java.lang.IllegalAccessException

setValue

public void setValue(java.lang.reflect.Field field,
                     java.lang.Object valueToSet,
                     java.lang.Object obj)
              throws java.lang.reflect.InvocationTargetException,
                     java.lang.IllegalAccessException

Use the setMethod to set a field property. If no set method exists, nothing is done.

Parameters:

field - The new Value value

valueToSet - The new Value value

obj - The new Value value

Throws:

java.lang.reflect.InvocationTargetException

java.lang.IllegalAccessException

getValue

public java.lang.Object getValue(java.lang.reflect.Field field,
                                 java.lang.Object obj)
                          throws java.lang.reflect.InvocationTargetException,
                                 java.lang.IllegalAccessException

Use the getMethod to get the value of the provided field.

Parameters:

field -

obj -

Returns:

The Value value

Throws:

java.lang.reflect.InvocationTargetException

java.lang.IllegalAccessException

initialize

protected void initialize()

Establish the object formatter for converting string properties to their actuall class type.

findMethod

protected java.lang.reflect.Method findMethod(java.lang.String fieldName,
                                              java.lang.Class fieldType,
                                              java.lang.Class targetClass)

Find the method called set so we can set the value. Property is the uppercase name of the fieldName parameter.

Parameters:

fieldType - The class of the field. This should be the set method's argument type.

fieldName - The name of a field on the target class.

targetClass -

Returns:

java.lang.reflect.Method The reflected method object found on the target class.

findMethod

protected java.lang.reflect.Method findMethod(java.lang.String fieldName,
                                              java.lang.Class targetClass)

Find the method called get so we can set the value. Property is the uppercase name of the fieldName parameter.

Parameters:

fieldName - The name of a field on the target class.

targetClass -

Returns:

java.lang.reflect.Method The reflected method object found on the target class.