Java tutorial
/* * Copyright 2017 Marcus Portmann * * 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 guru.mmp.application.web.template.pages; //~--- non-JDK imports -------------------------------------------------------- import guru.mmp.application.codes.CodeCategory; import guru.mmp.application.codes.CodeCategoryType; import guru.mmp.application.codes.ICodesService; import guru.mmp.application.web.WebApplicationException; import guru.mmp.application.web.pages.WebPageSecurity; import guru.mmp.application.web.template.TemplateSecurity; import guru.mmp.application.web.template.components.Dialog; import guru.mmp.application.web.template.components.PagingNavigator; import guru.mmp.application.web.template.data.CodeCategoryDataProvider; import org.apache.wicket.ajax.AjaxRequestTarget; import org.apache.wicket.ajax.markup.html.AjaxLink; import org.apache.wicket.markup.html.WebMarkupContainer; import org.apache.wicket.markup.html.basic.Label; import org.apache.wicket.markup.html.link.Link; import org.apache.wicket.markup.repeater.Item; import org.apache.wicket.markup.repeater.ReuseIfModelsEqualStrategy; import org.apache.wicket.markup.repeater.data.DataView; import org.apache.wicket.model.IModel; import org.apache.wicket.model.Model; import org.apache.wicket.model.PropertyModel; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import javax.inject.Inject; import java.util.UUID; //~--- JDK imports ------------------------------------------------------------ /** * The <code>CodeCategoryAdministrationPage</code> class implements the * "Code Category Administration" page for the Web Application Template. * * @author Marcus Portmann */ @WebPageSecurity(TemplateSecurity.FUNCTION_CODE_CODE_CATEGORY_ADMINISTRATION) public class CodeCategoryAdministrationPage extends TemplateWebPage { /* Logger */ private static final Logger logger = LoggerFactory.getLogger(CodeCategoryAdministrationPage.class); private static final long serialVersionUID = 1000000; /* Codes Service */ @Inject private ICodesService codesService; /** * Constructs a new <code>CodeCategoryAdministrationPage</code>. */ public CodeCategoryAdministrationPage() { super("Code Categories"); try { /* * The table container, which allows the table and its associated navigator to be updated * using AJAX. */ WebMarkupContainer tableContainer = new WebMarkupContainer("tableContainer"); tableContainer.setOutputMarkupId(true); add(tableContainer); // The dialog used to confirm the removal of a code category RemoveDialog removeDialog = new RemoveDialog(tableContainer); add(removeDialog); // The "addLink" used to add a new code category Link<Void> addLink = new Link<Void>("addLink") { private static final long serialVersionUID = 1000000; @Override public void onClick() { setResponsePage(new AddCodeCategoryPage(getPageReference())); } }; tableContainer.add(addLink); // The code category data view CodeCategoryDataProvider dataProvider = new CodeCategoryDataProvider(false); DataView<CodeCategory> dataView = new DataView<CodeCategory>("codeCategory", dataProvider) { private static final long serialVersionUID = 1000000; @Override protected void populateItem(Item<CodeCategory> item) { item.add(new Label("name", new PropertyModel<String>(item.getModel(), "name"))); item.add(new Label("categoryType", new PropertyModel<String>(item.getModel(), "categoryType.name"))); // The "updateLink" link Link<Void> updateLink = new Link<Void>("updateLink") { private static final long serialVersionUID = 1000000; @Override public void onClick() { UpdateCodeCategoryPage page = new UpdateCodeCategoryPage(getPageReference(), item.getModel()); setResponsePage(page); } }; item.add(updateLink); // The "removeLink" link AjaxLink<Void> removeLink = new AjaxLink<Void>("removeLink") { private static final long serialVersionUID = 1000000; @Override public void onClick(AjaxRequestTarget target) { removeDialog.show(target, item.getModel()); } }; item.add(removeLink); // The "codeAdministrationLink" link Link<Void> codeAdministrationLink = new Link<Void>("codeAdministrationLink") { private static final long serialVersionUID = 1000000; @Override public boolean isVisible() { return item.getModelObject().getCategoryType() == CodeCategoryType.LOCAL_STANDARD; } @Override public void onClick() { CodeCategory codeCategory = item.getModelObject(); UUID codeCategoryId = codeCategory.getId(); String codeCategoryName = codeCategory.getName(); setResponsePage(new CodeAdministrationPage(getPageReference(), codeCategoryId, codeCategoryName)); } }; item.add(codeAdministrationLink); } }; dataView.setItemsPerPage(10); dataView.setItemReuseStrategy(ReuseIfModelsEqualStrategy.getInstance()); tableContainer.add(dataView); tableContainer.add(new PagingNavigator("navigator", dataView)); } catch (Throwable e) { throw new WebApplicationException("Failed to initialise the CodeCategoryAdministrationPage", e); } } /** * The <code>RemoveDialog</code> class implements a dialog that allows the removal * of a code category to be confirmed. */ private class RemoveDialog extends Dialog { private static final long serialVersionUID = 1000000; private UUID id; private Label nameLabel; /** * Constructs a new <code>RemoveDialog</code>. * * @param tableContainer the table container, which allows the code category table and its * associated navigator to be updated using AJAX */ RemoveDialog(WebMarkupContainer tableContainer) { super("removeDialog"); nameLabel = new Label("name", Model.of("")); nameLabel.setOutputMarkupId(true); add(nameLabel); // The "removeLink" link AjaxLink<Void> removeLink = new AjaxLink<Void>("removeLink") { private static final long serialVersionUID = 1000000; @Override public void onClick(AjaxRequestTarget target) { try { codesService.deleteCodeCategory(id); target.add(tableContainer); CodeCategoryAdministrationPage.this.info("Successfully removed the code category " + nameLabel.getDefaultModelObjectAsString()); } catch (Throwable e) { logger.error( String.format("Failed to remove the code category (%s): %s", id, e.getMessage()), e); CodeCategoryAdministrationPage.this.error( "Failed to remove the code category " + nameLabel.getDefaultModelObjectAsString()); } target.add(getAlerts()); hide(target); } }; add(removeLink); } /** * Show the dialog using Ajax. * * @param target the AJAX request target * @param codeCategoryModel the model for the code category being removed */ public void show(AjaxRequestTarget target, IModel<CodeCategory> codeCategoryModel) { CodeCategory codeCategory = codeCategoryModel.getObject(); if (codeCategory != null) { id = codeCategory.getId(); nameLabel.setDefaultModelObject(codeCategory.getName()); target.add(nameLabel); super.show(target); } } } }