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NPE while instantiating a pojo using aClass.newInstance()

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aduchate

Post subject: NPE while instantiating a pojo using aClass.newInstance()

Posted: Wed Aug 29, 2007 3:23 pm

Newbie

Joined: Wed Aug 29, 2007 3:12 pm
Posts: 1

I have the following problem:

I need to instantiate a POJO from my DAO whose the class is passed as a parameter.

both

Code:

newNode = clazz.newInstance();
newNode.setCreationDate(new Timestamp(new Date().getTime()));

and

Code:

newNode = clazz.getConstructor().newInstance();
newNode.setCreationDate(new Timestamp(new Date().getTime()));

with clazz = Node.class

give a NPE:

java.lang.NullPointerException
at org.taktik.nadi.Node$$EnhancerByCGLIB$$93c8c57f.setCreationDate(<generated>)
at org.taktik.nadi.dao.impl.NodeDAOImpl.create(NodeDAOImpl.java:62)

while

Code:

newNode = new Node();
newNode.setCreationDate(new Timestamp(new Date().getTime()));

works like a charm.

Is this an expected behaviour. If yes, is there any way (using Metaclass.instantiate for example) to instantiate a POJO from its class.

Thanks in advance,

Antoine

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