EDIT

import eu.etaxonomy.cdm.model.common.DefinedTerm;

import eu.etaxonomy.cdm.model.common.TermType;

	/**

	 * <p>

	 * Constructor for AbstractTermComboElement.

	 * </p>

	 * 

	 * @param parentElement

	 *            a {@link eu.etaxonomy.taxeditor.ui.element.ICdmFormElement}

	 *            object.

	 * @param style

	 *            a int.

	 * @param formFactory

	 *            a {@link eu.etaxonomy.taxeditor.ui.element.CdmFormFactory}

	 *            object.

	 * @param labelString

	 *            a {@link java.lang.String} object.

	 * @param selection

	 *            a T object.

	 * @param visibleItems

	 *            a int.

	 * @param <T>

	 *            a T object.

	 */

	public TermComboElement(CdmFormFactory formFactory,

			ICdmFormElement parentElement, TermType termType, String labelString, T selection,

			int style) {

		super(formFactory, parentElement);

		this.termClass =  (Class<T>) DefinedTerm.class;

		if (labelString != null) {

			label = formFactory.createLabel(getLayoutComposite(), labelString);

			addControl(label);

		}

		// create combo

		combo = new Combo(getLayoutComposite(), SWT.BORDER | SWT.READ_ONLY);

		addControl(combo);

		combo.setLayoutData(LayoutConstants.FILL_HORIZONTALLY());

		combo.setVisibleItemCount(DEFAULT_VISIBLE_ITEMS);

		populateTerms(filterDefinedTermByTermType(getPreferredTerms(), termType));

		combo.addSelectionListener(this);

		combo.addDisposeListener(this);

		PreferencesUtil.getPreferenceStore().addPropertyChangeListener(this);

		if (selection != null) {

			setSelection(selection);

		}

	}

	private List<T> filterDefinedTermByTermType(List<T> terms, TermType termType) {

		List<T> definedTerms = new ArrayList<T>();

		for(T term : terms){

			if(term.getTermType().equals(termType)) {

				definedTerms.add(term);

			}

		}		

		return definedTerms;

	}