nl.knaw.dans.dccd.web.user.SelectUserFromTablePanel.java Source code

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Here is the source code for nl.knaw.dans.dccd.web.user.SelectUserFromTablePanel.java

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/*******************************************************************************
 * Copyright 2015 DANS - Data Archiving and Networked Services
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package nl.knaw.dans.dccd.web.user;

import java.util.Iterator;
import java.util.List;

import nl.knaw.dans.dccd.application.services.DccdUserService;
import nl.knaw.dans.dccd.application.services.UserServiceException;
import nl.knaw.dans.dccd.model.DccdUser;
import nl.knaw.dans.dccd.web.DccdSession;
import nl.knaw.dans.dccd.web.error.ErrorPage;

import org.apache.log4j.Logger;
import org.apache.wicket.RestartResponseException;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.markup.html.AjaxLink;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.list.ListItem;
import org.apache.wicket.markup.html.list.ListView;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.model.IModel;

/**
 * @author dev
 */
public class SelectUserFromTablePanel extends Panel {
    private static final long serialVersionUID = 3582496329837618205L;
    private static Logger logger = Logger.getLogger(SelectUserFromTablePanel.class);
    private String selectedUserId = "";

    public SelectUserFromTablePanel(String id, IModel<?> model) {
        super(id, model);

        init();
    }

    private void init() {
        List<DccdUser> selectableUsers = null;
        try {
            // Note: when we do it pageable, it seems better to get only the id's 
            // and then construct the users we want to show on a page

            // only active ... selectable (permission assignable) users
            selectableUsers = DccdUserService.getService().getActiveNormalUsers();

            // remove current user, might take some time if the list is long
            DccdUser user = (DccdUser) ((DccdSession) getSession()).getUser();
            String currentUserId = user.getId();
            Iterator<DccdUser> iterator = selectableUsers.iterator();
            while (iterator.hasNext()) {
                DccdUser selectableUser = (DccdUser) iterator.next();
                if (selectableUser.getId().compareTo(currentUserId) == 0) {
                    iterator.remove();
                    break; // done, because only once in the list
                }
            }
        } catch (UserServiceException e) {
            logger.error("Exception while retrieving users: ", e);
            error("Internal error");
            throw new RestartResponseException(ErrorPage.class);
        }

        // show table with all active DCCD users
        // when we have a lot of users, this should become pagable! 
        ListView listview = new ListView("listview", selectableUsers) {
            private static final long serialVersionUID = -2830791437271425906L;

            protected void populateItem(ListItem item) {
                final DccdUser user = (DccdUser) item.getModelObject();
                AjaxLink link = new AjaxLink("link") {
                    private static final long serialVersionUID = 1L;

                    @Override
                    public void onClick(AjaxRequestTarget target) {
                        selectedUserId = user.getId();
                        logger.debug("selected user id: " + selectedUserId);

                        // update
                        SelectUserFromTablePanel.this.setDefaultModelObject(user);
                        onSelectionChanged(target);
                    }
                };
                item.add(link);
                item.add(new Label("surname", user.getSurname()));
                item.add(new Label("displayname", user.getDisplayName()));
                item.add(new Label("organisation", user.getOrganization()));
            }
        };
        add(listview);
    }

    /**
     * Called when selection (node in tree) has changed
     * override this to do your own handling
     */
    protected void onSelectionChanged(AjaxRequestTarget target) {
        // empty!
    }
}