org.antbear.jee.wicket.guestbook.web.ViewGuestbook.java Source code

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Here is the source code for org.antbear.jee.wicket.guestbook.web.ViewGuestbook.java

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/*
 * Copyright 2011 Marcus Geiger.
 *
 * 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 org.antbear.jee.wicket.guestbook.web;

import org.antbear.jee.wicket.guestbook.model.Entry;
import org.antbear.jee.wicket.guestbook.model.Guestbook;
import org.antbear.jee.wicket.guestbook.persistence.GuestbookService;
import org.apache.wicket.PageParameters;
import org.apache.wicket.RestartResponseAtInterceptPageException;
import org.apache.wicket.datetime.markup.html.basic.DateLabel;
import org.apache.wicket.markup.html.WebMarkupContainer;
import org.apache.wicket.markup.html.WebPage;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.link.ExternalLink;
import org.apache.wicket.markup.html.list.ListItem;
import org.apache.wicket.markup.html.list.PropertyListView;
import org.apache.wicket.model.CompoundPropertyModel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.PropertyModel;
import org.apache.wicket.spring.injection.annot.SpringBean;

/**
 * View and add entries to a guestbook.
 *
 * @author Marcus Geiger
 */
public class ViewGuestbook extends WebPage {
    private static final long serialVersionUID = 1L;

    public static final String PAGE_PARAM_GUESTBOOK_ID = "guestbook";

    @SpringBean
    private GuestbookService guestbookService;

    /**
     * The guestbook id, initialiazied by given page parameters.
     * @see #ViewGuestbook(org.apache.wicket.PageParameters)
     */
    private final Long guestbookId;

    // The model gets refreshed when an entry has been added to the guestbook
    private IModel<Guestbook> guestbookModel;

    // The entry list view gets a refreshed model when an entry has been added to the guestbook
    private PropertyListView<Entry> entryListView;

    // Don't provide default ctor, because we need the guestbook to be viewed.

    public ViewGuestbook(final PageParameters parameters) {
        super(parameters);

        if (null == (this.guestbookId = parameters.getAsLong(PAGE_PARAM_GUESTBOOK_ID)))
            throw new RestartResponseAtInterceptPageException(HomePage.class);
    }

    @Override
    protected void onInitialize() {
        super.onInitialize();

        if (guestbookId == null)
            throw new IllegalStateException("Invariant not fullfilled: guestbookId");

        this.guestbookModel = new CompoundPropertyModel<Guestbook>(guestbookService.find(guestbookId));
        WebMarkupContainer wrapper = new WebMarkupContainer("wrapper", guestbookModel);
        add(wrapper);

        wrapper.add(new Label("name1", new PropertyModel<String>(guestbookModel, "name")).setRenderBodyOnly(true));
        wrapper.add(new Label("name2", new PropertyModel<String>(guestbookModel, "name")).setRenderBodyOnly(true));

        this.entryListView = new PropertyListView<Entry>("entries", guestbookModel.getObject().getEntries()) {
            private static final long serialVersionUID = 1L;

            @Override
            protected void populateItem(ListItem<Entry> item) {
                item.add(new Label("authorName").setRenderBodyOnly(true));
                item.add(DateLabel.forShortStyle("creationDate").setRenderBodyOnly(true));

                PropertyModel<String> emailModel = new PropertyModel<String>(item.getDefaultModelObject(),
                        "authorEmail");
                ExternalLink emailLink = new ExternalLink("authorEmail", "mailto:" + emailModel.getObject());
                emailLink.add(new Label("authorEmailText", emailModel).setRenderBodyOnly(true));
                item.add(emailLink);

                item.add(new Label("text").setRenderBodyOnly(true));
            }
        };
        entryListView.setRenderBodyOnly(true);
        wrapper.add(entryListView);

        AddEntryPanel addEntryPanel = new AddEntryPanel("addEntryPanel", guestbookId);
        // Get notified when an entry has been added to the guestbook
        addEntryPanel.setEntrySubmitObserver(new AddEntryPanel.EntrySubmitObserver() {
            private static final long serialVersionUID = 1L;

            @Override
            public void entrySubmitted() {
                reloadModel();
            }
        });
        wrapper.add(addEntryPanel);
    }

    private void reloadModel() {
        guestbookModel = new CompoundPropertyModel<Guestbook>(guestbookService.find(guestbookId));
        entryListView.setModelObject(guestbookModel.getObject().getEntries());
    }
}