com.finalist.tools.database
Class MethodInvoker

java.lang.Object
  com.finalist.tools.database.MethodInvoker

public class MethodInvoker

extends java.lang.Object

Helper class used to reflectively call setters and getters of beans and determine the return type.

Version:

1.0

Author:

P.S.D.Reitsma, Finalist IT Group

Constructor Summary

MethodInvoker()

Method Summary

static java.lang.reflect.Method	getBeanMethod(java.lang.Class beanClass, java.lang.String property, java.lang.String prefix) Returns the method of a bean using taking the property name and a prefix.
static java.util.ArrayList	getGetterNames(java.lang.Object bean) Returns the names of all the getters of the tested bean
static java.lang.Object	getProperty(java.lang.Object bean, java.lang.String property) Executes the getter method of a property of a bean.
static java.lang.String	getReturnType(java.lang.Object bean, java.lang.String property) Returns the object classname of a property of a bean.
static boolean	getterExists(java.lang.Object bean, java.lang.String property) Test a bean whether a certain getter exists for a property.
static void	setProperty(java.lang.Object bean, java.lang.String property, java.lang.Object value) Executes the setter method of a property of a bean.

Methods inherited from class java.lang.Object

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

Constructor Detail

MethodInvoker

public MethodInvoker()

Method Detail

getBeanMethod

public static java.lang.reflect.Method getBeanMethod(java.lang.Class beanClass,
                                                     java.lang.String property,
                                                     java.lang.String prefix)
                                              throws java.lang.NoSuchMethodException

Returns the method of a bean using taking the property name and a prefix. It is used to find getters or setters (prefix="get" or "set") for a certain property. This method is not case sensitive. In case the method is not found in the current class, it recursively looks in superclasses until java.lang.Object is met.

Parameters:

beanClass - class of the bean object that owns the method

property - that is get or set by the method

prefix - String that is concatenated to the property

Returns:

the desired method

Throws:

java.lang.NoSuchMethodException - thrown when the method is not found

getGetterNames

public static java.util.ArrayList getGetterNames(java.lang.Object bean)

Returns the names of all the getters of the tested bean

Returns:

ArrayList containing the names

getProperty

public static java.lang.Object getProperty(java.lang.Object bean,
                                           java.lang.String property)
                                    throws java.lang.IllegalAccessException,
                                           java.lang.IllegalArgumentException,
                                           java.lang.reflect.InvocationTargetException,
                                           java.lang.NoSuchMethodException

Executes the getter method of a property of a bean.

Parameters:

bean - the bean of which the method should be called

property - the property that should be derived

Returns:

the value of the property

Throws:

java.lang.IllegalAccessException

java.lang.IllegalArgumentException

java.lang.reflect.InvocationTargetException

java.lang.NoSuchMethodException

setProperty

public static void setProperty(java.lang.Object bean,
                               java.lang.String property,
                               java.lang.Object value)
                        throws java.lang.IllegalAccessException,
                               java.lang.IllegalArgumentException,
                               java.lang.reflect.InvocationTargetException,
                               java.lang.NoSuchMethodException

Executes the setter method of a property of a bean.

Parameters:

bean - the bean of which the method should be called

property - the property that is set

Throws:

java.lang.IllegalAccessException

java.lang.IllegalArgumentException

java.lang.reflect.InvocationTargetException

java.lang.NoSuchMethodException

getReturnType

public static java.lang.String getReturnType(java.lang.Object bean,
                                             java.lang.String property)
                                      throws java.lang.IllegalArgumentException,
                                             java.lang.NoSuchMethodException

Returns the object classname of a property of a bean.

Parameters:

bean - the bean to be examined

property - the property of which the return type is returned

Throws:

java.lang.IllegalArgumentException

java.lang.NoSuchMethodException

getterExists

public static boolean getterExists(java.lang.Object bean,
                                   java.lang.String property)

Test a bean whether a certain getter exists for a property.

Parameters:

bean - the bean that should be tested

property - the property of which the return type is returned

Returns:

boolean