org.apache.ojb.broker.util
Class ConstructorHelper

java.lang.Object
  org.apache.ojb.broker.util.ConstructorHelper

public class ConstructorHelper

extends java.lang.Object

This class helps us to construct new instances. We don't want to rely on public default constructors and have to try hard to also use private or protected constructors.

Version:

$Id: ConstructorHelper.java 365232 2005-12-21 22:36:07Z tomdz $

Author:

Thomas Mahler, Lance Eason

Method Summary

static java.lang.Object	instantiate(java.lang.Class clazz) create a new instance of class clazz.
static java.lang.Object	instantiate(java.lang.reflect.Constructor constructor) create a new instance of the class represented by the no-argument constructor provided

Methods inherited from class java.lang.Object

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

Method Detail

instantiate

public static java.lang.Object instantiate(java.lang.Class clazz)
                                    throws java.lang.InstantiationException

create a new instance of class clazz. first use the public default constructor. If this fails also try to use protected an private constructors.

Parameters:

clazz - the class to instantiate

Returns:

the fresh instance of class clazz

Throws:

java.lang.InstantiationException

instantiate

public static java.lang.Object instantiate(java.lang.reflect.Constructor constructor)
                                    throws java.lang.InstantiationException

create a new instance of the class represented by the no-argument constructor provided

Parameters:

constructor - the zero argument constructor for the class

Returns:

a new instance of the class

Throws:

java.lang.InstantiationException

ClassNotPersistenceCapableException - if the constructor is null or there is an exception while trying to create a new instance