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From Valerio Schiavoni <valerio.schiav...@gmail.com>
Subject Digester: create parent from child node value
Date Tue, 20 Dec 2005 15:12:55 GMT
Hello,
i'm using digester to parse this kind ofxml:

<parameters  type="RenameRelationOperatorParameter">
    <param>newName</param>
</parameters>

there are different kind of types. Now, the value of the parameters should
be used on the
1-arg constructor for objects of type RenameRelationOperatorParameter. At
this time, there are no setParam method, and i' searching for a solution
that avoid adding them.

in my digesterReader at this time i have this (reduced to show the problem)
:

digester.addFactoryCreate("parameters", new OperatorParameterFactory());

and the OperatorParameterFactory is:
    public static class OperatorParameterFactory extends
AbstractObjectCreationFactory {

      @Override
      public Object createObject(Attributes arg0) throws Exception {
          String operatorType = arg0.getValue("type");
          OperatorParameter result = null;

          try {
            result = (OperatorParameter) Class.forName
(operatorType).newInstance();
          }catch ( ClassNotFoundException e) {
            throw new UnsupportedOperationException("OperatorParameter named
"+operatorType+" is not supported yet");
          }

          return result;
      }

  }

thanks for any support you can provide,
valerio
--
To Iterate is Human, to Recurse, Divine
James O. Coplien, Bell Labs

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