EDIT

package eu.etaxonomy.taxeditor.editor.view.derivate.handler;

import eu.etaxonomy.cdm.api.application.CdmApplicationState;

import eu.etaxonomy.cdm.model.molecular.Sequence;

import eu.etaxonomy.cdm.model.molecular.SingleRead;

import eu.etaxonomy.cdm.model.occurrence.DerivationEventType;

import eu.etaxonomy.cdm.model.occurrence.DerivedUnit;

public class AddSingleReadHandler extends AbstractAddDerivativeHandler{

    @Override

    protected boolean isAllowed(Object derivative) {

        if(derivative instanceof Sequence){

            return true;

        }

        return false;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected Object addElement(Object selectedDerivative) {

        SingleRead newInstance = SingleRead.NewInstance();

        ((Sequence) selectedDerivative).addSingleRead(newInstance);

        CdmApplicationState.getCurrentAppConfig().getSequenceService().merge((Sequence)selectedDerivative, true);

        return newInstance;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected DerivedUnit createDerivative() {

        //not used here

        return null;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected DerivationEventType getDerivationeType() {

        //not used here

        return null;

    }

}