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Xtend Recursive method issues [message #1080649]

Tue, 06 August 2013 08:02

Ankit Agarwal

Messages: 35
Registered: March 2012

Member

Hi,

I have a java class with two methods like :

public List<Node> collectSubNodes(Node node)
{
List<Node> nodeList = new ArrayList<Node>();
collectSubStatesOfState(node, nodeList );
return nodeList ;
}

private void collectSubNodesOfNode(Node node, List<Node> nodeList )
{
if(node!= null)
{
EList<Vertex> subnodes = node.getSubNodes();
for(Vertex vertex : subnodes )
{
if(vertex instanceof Node )
{
Node subNode = (Node )vertex;
nodeList.add(subNode );
collectSubNodesOfNode(subNode, nodeList);
}
}

}
}

I want to write this in an *.ext class, i tried with

cached List[Node ] collectSubNodes(Node this) :
subNodes.typeSelect(Node).addAll(subNodes.typeSelect(Node).collectSubNodes())
;

but i am getting StackOverflow exception, May be it is going in infinite loop.
but i am struggling to write as it is recursive method and should return a list with all the details. Please help me in writing the same.

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Re: Xtend Recursive method issues [message #1081031 is a reply to message #1080649]

Tue, 06 August 2013 18:02

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

HI,

i actually cannot reproduce this. sure you have a tree and not a graph?

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: Xtend Recursive method issues [message #1081392 is a reply to message #1080649]

Wed, 07 August 2013 07:11

Karsten Thoms

Messages: 762
Registered: July 2009
Location: Dortmund, Germany

Senior Member

The method collectSubNodes() calls collectSubStatesOfState(), and not the method collectSubNodesOfNode().

You should write a unit test to test your Java method.

Need professional support for Xtext, EMF, Eclipse IDE?
Go to: http://devhub.karakun.com
Twitter : @kthoms
Blog : www.karsten-thoms.de

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