EDIT

// $Id$

/**

 * Copyright (C) 2007 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.remote.controller;

import java.io.IOException;

import java.util.List;

import java.util.UUID;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;

import org.springframework.web.bind.WebDataBinder;

import org.springframework.web.bind.annotation.InitBinder;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RequestParam;

import eu.etaxonomy.cdm.api.service.IService;

import eu.etaxonomy.cdm.api.service.pager.Pager;

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

import eu.etaxonomy.cdm.remote.controller.util.PagerParameters;

import eu.etaxonomy.cdm.remote.editor.CdmTypePropertyEditor;

import eu.etaxonomy.cdm.remote.editor.UUIDPropertyEditor;

/**

 * @author a.kohlbecker

 * @date 22.07.2009

 *

 * @param <T>

 * @param <SERVICE>

 *

 */

public abstract class BaseListController <T extends CdmBase, SERVICE extends IService<T>> extends AbstractListController<T, SERVICE> {

    public static final Logger logger = Logger.getLogger(BaseListController.class);

    @InitBinder

    public void initBinder(WebDataBinder binder) {

        binder.registerCustomEditor(UUID.class, new UUIDPropertyEditor());

        binder.registerCustomEditor(Class.class, new CdmTypePropertyEditor());

    }

    /**

     * NOTE: The indices for pages are 0-based see {@link Pager}

     *

     * @param pageIndex

     *            the index of the page to be returned, the first page has the

     *            pageIndex = 0 - <i>optional parameter</i>. Defaults to 0 if

     *            set to <code>NULL</code>.

     * @param pageSize

     *            the maximum number of entities returned per page.

     *            The {@link #DEFAULT_PAGE_SIZE} will be used if pageSize is set to

     *            <code>null</code> - <i>optional parameter</i>

     * @param type

     *            Further restricts the type of entities to be returned.

     *            If null the base type <code>&lt;T&gt;</code> is being used. - <i>optional parameter</i>

     * @return

     * @throws IOException

     */

    @SuppressWarnings("unchecked")

    @RequestMapping(method = RequestMethod.GET)

    public Pager<T> doPage(

            @RequestParam(value = "pageNumber", required = false) Integer pageIndex,

            @RequestParam(value = "pageSize", required = false) Integer pageSize,

            @RequestParam(value = "class", required = false) Class type,

            @RequestParam(name="orderBy", defaultValue="BY_TITLE_CACHE_ASC", required=true) OrderHintPreset orderBy,

            HttpServletRequest request,

            HttpServletResponse response) throws IOException

            {

        logger.info("doPage() " + requestPathAndQuery(request));

        PagerParameters pagerParameters = new PagerParameters(pageSize, pageIndex);

        pagerParameters.normalizeAndValidate(response);

        if(type != null) {

            orderBy = orderBy.checkSuitableFor(type);

            // TODO how can we check in case type == null?

        }

        return service.page(type, pagerParameters.getPageSize(), pagerParameters.getPageIndex(), orderBy.orderHints(), getInitializationStrategy());

    }

//    /**

//     * Parameter less method to be used as default when request without parameter are made. Otherwise

//     * the nameless methods {@link #doPage(Integer, Integer, Class)} and {@link #doList(Integer, Integer, Class)}

//     * are ambigous.

//     * @return

//     * @throws IOException

//     */

//    @RequestMapping(method = RequestMethod.GET)

//    public Pager<T> doPage(HttpServletRequest request, HttpServletResponse response) throws IOException{

//        return doPage(null, null, null, request, response);

//    }

    /**

     * @param start

     *            The offset index from the start of the list. The first entity

     *            has the index = 0 - <i>required parameter</i>

     * @param limit

     *            The maximum number of entities returned. - <i>optional parameter</i>

     *            If limit is set to a value < 1 all entities will be returned

     * @param type

     *            Further restricts the type of entities to be returned.

     *            If null the base type <code>&lt;T&gt;</code> is being used. - <i>optional parameter</i>

     * @return a List of entities

     */

    @RequestMapping(method = RequestMethod.GET, params = "start")

    public List<T> doList(

            @RequestParam(value = "start", required = true) Integer start,

            @RequestParam(value = "limit", required = false) Integer limit,

            @RequestParam(value = "class", required = false) Class<T> type,

            HttpServletRequest request,

            HttpServletResponse response) {

        if (request != null)

        {

            logger.info("doList() " + requestPathAndQuery(request));

        }

        //if(start == null){ start = 0;}

        if(limit == null){ limit = PagerParameters.DEFAULT_PAGESIZE;}

        if(limit < 1){ limit = null;}

        return service.list(type, limit, start, null, getInitializationStrategy());

    }

  /* TODO

   @RequestMapping(method = RequestMethod.POST)

  public T doPost(@ModelAttribute("object") T object, BindingResult result) {

        validator.validate(object, result);

        if (result.hasErrors()) {

                // set http status code depending upon what happened, possibly return

            // the put object and errors so that they can be rendered into a suitable error response

        } else {

          // should set the status to 201 created  and "Location" header to "/resource/uuid"

          service.save(object);

        }

  }

  */

}