"create exampleset with text plugin"

Hi all,

in Java code I would like to create an exampleset with the textplugin. I tried WVToolRapidMinerExample.java with my input and it works fine. I copied the exact code of this example to my method and I get an acces denied error. Debugging showed that WVToolRapidMinerExample.java treats my input as a directory containing traindocuments, as it should, but when I use my method  directories are treated as files which of course results in an exception.

Here is my code, RapidMiner is initialised when this code is reached;

private ExampleSet buildTrainExampleSetNieuw(Category category)
            throws OperatorCreationException, OperatorException {
        OperatorChain wvtoolOperator = (OperatorChain) OperatorService
                .createOperator("TextInput");
        wvtoolOperator.setParameter(TextInput.PARAMETER_DEFAULT_CONTENT_TYPE,
                "application/xml");
        wvtoolOperator.setParameter(
                TextInput.PARAMETER_DEFAULT_CONTENT_LANGUAGE, "dutch");
        wvtoolOperator.setParameter(
                TextInput.PARAMETER_DEFAULT_CONTENT_ENCODING, "iso-8859-1");
        wvtoolOperator.setParameter(TextInput.PARAMETER_PRUNE_BELOW, "3");
        wvtoolOperator.setParameter(TextInput.PARAMETER_PRUNE_ABOVE, "10");

        List<Object[]> textList = new LinkedList<Object[]>();

        textList
                .add(new Object[] { "Ambtenarenrecht",
                        "c:/workspace/documentclassification/trainset/Ambtenarenrecht/" });
        textList
                .add(new Object[] { "non-Ambtenarenrecht",
                        "c:/workspace/documentclassification/trainsetnon/Ambtenarenrecht/" });

        wvtoolOperator.addOperator(OperatorService
                .createOperator(SimpleTokenizer.class));

        wvtoolOperator.setListParameter("texts", textList);
        IOContainer out = wvtoolOperator.apply(new IOContainer());
        return out.get(ExampleSet.class);
    }

This is the code in WVToolRapidMinerExample.java that does a good job;

public static void main(String[] args) throws Exception {
        FileInputStream inputStream = new FileInputStream(
                "C:\\workspace\\textplugin\\resources\\operators.xml");
        RapidMiner.init(inputStream, new File("rm_plugins"), true, false,
                false, true);
        inputStream.close();
        OperatorChain wvtoolOperator = (OperatorChain) OperatorService
                .createOperator("TextInput");
        wvtoolOperator.setParameter(TextInput.PARAMETER_DEFAULT_CONTENT_TYPE,
                "application/xml");
        wvtoolOperator.setParameter(
                TextInput.PARAMETER_DEFAULT_CONTENT_LANGUAGE, "dutch");
        wvtoolOperator.setParameter(
                TextInput.PARAMETER_DEFAULT_CONTENT_ENCODING, "iso-8859-1");
        wvtoolOperator.setParameter(TextInput.PARAMETER_PRUNE_BELOW, "3");
        wvtoolOperator.setParameter(TextInput.PARAMETER_PRUNE_ABOVE, "10");

        List<Object[]> textList = new LinkedList<Object[]>();

        // adjust data input
        textList
                .add(new Object[] { "Ambtenarenrecht",
                        "c:/workspace/documentclassification/trainset/Ambtenarenrecht/" });
        textList
                .add(new Object[] { "non-Ambtenarenrecht",
                        "c:/workspace/documentclassification/trainsetnon/Ambtenarenrecht/" });
        wvtoolOperator.addOperator(OperatorService
                .createOperator(SimpleTokenizer.class));

         wvtoolOperator.setListParameter("texts", textList);

        IOContainer out = wvtoolOperator.apply(new IOContainer());
        System.out.println("klaar");
    }

Any ideas on what I am doing wrong in  my code? I use Rapidminer/textplugin 4.2. Any suggestions that help solve this problem will be much appreciated.

Martine