EDIT

/**

* Copyright (C) 2017 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.vaadin.component;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.beans.factory.annotation.Qualifier;

import com.vaadin.data.util.BeanItemContainer;

import com.vaadin.spring.annotation.SpringComponent;

import com.vaadin.ui.ListSelect;

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

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

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

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

import eu.etaxonomy.cdm.persistence.query.OrderHint;

/**

 * @author a.kohlbecker

 * @since Apr 6, 2017

 *

 */

@SpringComponent

public class SelectFieldFactory {

    @Autowired

    @Qualifier("cdmRepository")

    private CdmRepository repo;

    private final static List<String> INIT_STRATEGY = Arrays.asList(new String[]{"$", "representations"});

    private static List<OrderHint> orderHints = new ArrayList<>();

    static {

        orderHints.add(OrderHint.BY_ORDER_INDEX);

        orderHints.add(OrderHint.ORDER_BY_TITLE_CACHE);

    }

    public ListSelect createListSelect(String caption, TermType termType){

        BeanItemContainer<DefinedTermBase> termItemContainer = buildBeanItemContainer(termType);

        ListSelect select = new ListSelect(caption, termItemContainer);

        return select;

    }

    /**

     * @param termType

     */

    private BeanItemContainer<DefinedTermBase> buildBeanItemContainer(TermType termType) {

        // TODO use TermCacher?

        List<DefinedTermBase> terms = repo.getTermService().listByTermType(termType, null, null, orderHints, INIT_STRATEGY);

        BeanItemContainer<DefinedTermBase> termItemContainer = new BeanItemContainer<>(DefinedTermBase.class);

        termItemContainer.addAll(terms);

        return termItemContainer;

    }

    /**

     *

     * @param caption

     * @param type

     * @return

     */

    public <T extends CdmBase> ListSelect createListSelect(String caption, Class<T> type){

        return createListSelect(caption, type, null);

    }

    public <T extends CdmBase> ListSelect createListSelect(String caption, Class<T> type, List<OrderHint> orderHints){

        if(orderHints == null){

            orderHints = OrderHint.defaultOrderHintsFor(type);

        }

        BeanItemContainer<T> termItemContainer = buildBeanItemContainer(type, orderHints);

        ListSelect select = new ListSelect(caption, termItemContainer);

        // guess property id to use for display

        String propertyId = null;

        if(orderHints != null && !orderHints.isEmpty()){

            propertyId = orderHints.get(0).getPropertyName();

            select.setItemCaptionPropertyId(propertyId);

        }

        return select;

    }

    /**

     * @param termType

     */

    private <T extends CdmBase> BeanItemContainer<T> buildBeanItemContainer(Class<T> type, List<OrderHint> orderHints) {

        List<T> terms = repo.getCommonService().list(type, (Integer)null, (Integer)null,

                orderHints,

                Arrays.asList(new String[]{"$"}));

        BeanItemContainer<T> termItemContainer = new BeanItemContainer<>(type);

        termItemContainer.addAll(terms);

        return termItemContainer;

    }

}