com.googlecode.genericdao.dao

Class DAOUtil

java.lang.Object

com.googlecode.genericdao.dao.DAOUtil

public class DAOUtil
extends Object

Utility methods for Hibernate Genereic DAO.

Author:

dwolverton

Constructor Summary

Constructors

Constructor and Description
DAOUtil()

Method Summary

Methods

Modifier and Type	Method and Description
static Object	callMethod(Object object, String methodName, Class<?>[] paramTypes, Object... args) This is a helper method to call a method on an Object with the given parameters.
static Object	callMethod(Object object, String methodName, Object... args) This is a helper method to call a method on an Object with the given parameters.
static Method	getMethod(Class<?> klass, String methodName, Class<?>... paramTypes)
static <T> List<Class<?>>	getTypeArguments(Class<T> baseClass, Class<? extends T> childClass) Get the actual type arguments a child class has used to extend a generic base class.

Methods inherited from class java.lang.Object

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

Constructor Detail

DAOUtil

public DAOUtil()

Method Detail

getTypeArguments

public static <T> List<Class<?>> getTypeArguments(Class<T> baseClass,
                                  Class<? extends T> childClass)

Get the actual type arguments a child class has used to extend a generic base class. (Taken from http://www.artima.com/weblogs/viewpost.jsp?thread=208860. Thanks mathieu.grenonville for finding this solution!)

Parameters:

baseClass - the base class

childClass - the child class

Returns:

a list of the raw classes for the actual type arguments.

callMethod

public static Object callMethod(Object object,
                String methodName,
                Object... args)
                         throws NoSuchMethodException,
                                IllegalArgumentException,
                                IllegalAccessException,
                                InvocationTargetException

This is a helper method to call a method on an Object with the given parameters. It is used for dispatching to specific DAOs that do not implement the GenericDAO interface.

Throws:

NoSuchMethodException

IllegalArgumentException

IllegalAccessException

InvocationTargetException

callMethod

public static Object callMethod(Object object,
                String methodName,
                Class<?>[] paramTypes,
                Object... args)
                         throws NoSuchMethodException,
                                IllegalArgumentException,
                                IllegalAccessException,
                                InvocationTargetException

This is a helper method to call a method on an Object with the given parameters. It is used for dispatching to specific DAOs that do not implement the GenericDAO interface.

Throws:

NoSuchMethodException

IllegalArgumentException

IllegalAccessException

InvocationTargetException

getMethod

public static Method getMethod(Class<?> klass,
               String methodName,
               Class<?>... paramTypes)