ulstemmer.h

#ifndef ULSTEMMER_H
#define ULSTEMMER_H

#include "ulworker.h"
#include "uldissector.h"
#include "ulfrequency.h"

class ULStemmer : public ULWorker
{
public:
    ULStemmer();
    ULStemmer(const ULStemmer& other);
    virtual ~ULStemmer();

    ULStemmer& operator=(const ULStemmer& other);
    void clear();

    // Accessors
    ULDissector *getDissector();
    void setDissector(ULDissector *newDissector);
    const ULLanguage& getLanguage() const;

    // ULWorker interfaces.
    virtual bool isServiceAvailable(const ULServiceDescriptor& service);
    virtual void getAvailableServices(ULList<ULServiceDescriptor>& services);
    virtual void setCancelOperation(bool shouldCancel);

    // The stemmer's core services.
    ULError getAllStems(const ULString& surfaceForm, ULList<ULDerivation>& stemList);

    ULError getStems(const ULString& surfaceForm, ULList<ULDerivation>& stemList);

    ULError getStems(const ULString& surfaceForm,
                     const ULPartOfSpeechCategory& category,
                     ULList<ULDerivation>& stemList);
    
    ULError getFrequencies(const ULString& surfaceForm, ULList<ULFrequency>& frequencyList);

private:
    ULDissector *dissector;
    
    void removeDuplicateRootWords(ULList<ULDerivation>& stemList);
};

#endif