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javaintrospectionvisitor-patternobject-graph

Java object graph visitor library

Do you know a good java object graph visitor library?

I want to visit an object and its sub components and perform some actions when some conditions are matched.

Example usage:

  • on a huge domain object graph, reset each id to null
  • on a huge domain object graph, replace each Set with a TreeSet instance containing the same elements.

I want a library, not custom code because traversing an Object graph can be tricky. You have to handle collections, arrays, proxies, and so on... I have think about reuse part of XStream to achieve this, but it doesn't look so easy: Xstream visitor is more oriented on object transformation than object self modification.

Solution

  • I've been looking for the same thing, and found this.

    http://code.google.com/p/behaim/