Java tutorial
/* * Copyright 2013 ArcBees Inc. * * 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.javahispano.javaleague.client.application.manufacturer; import java.util.Arrays; import java.util.List; import javax.inject.Inject; import org.javahispano.javaleague.client.application.ApplicationPresenter; import org.javahispano.javaleague.client.application.event.ActionBarEvent; import org.javahispano.javaleague.client.application.event.ChangeActionBarEvent; import org.javahispano.javaleague.client.application.event.ChangeActionBarEvent.ActionType; import org.javahispano.javaleague.client.application.event.DisplayMessageEvent; import org.javahispano.javaleague.client.application.event.GoBackEvent; import org.javahispano.javaleague.client.application.manufacturer.ManufacturerDetailPresenter.MyProxy; import org.javahispano.javaleague.client.application.manufacturer.ManufacturerDetailPresenter.MyView; import org.javahispano.javaleague.client.application.widget.message.Message; import org.javahispano.javaleague.client.application.widget.message.MessageStyle; import org.javahispano.javaleague.client.place.NameTokens; import org.javahispano.javaleague.client.resources.EditManufacturerMessages; import org.javahispano.javaleague.client.util.AbstractAsyncCallback; import org.javahispano.javaleague.client.util.ErrorHandlerAsyncCallback; import org.javahispano.javaleague.shared.api.ManufacturersResource; import org.javahispano.javaleague.shared.dto.ManufacturerDto; import com.google.common.base.Strings; import com.google.gwt.user.client.Window; import com.google.web.bindery.event.shared.EventBus; import com.gwtplatform.dispatch.rest.delegates.client.ResourceDelegate; import com.gwtplatform.mvp.client.HasUiHandlers; import com.gwtplatform.mvp.client.Presenter; import com.gwtplatform.mvp.client.View; import com.gwtplatform.mvp.client.annotations.NameToken; import com.gwtplatform.mvp.client.annotations.ProxyCodeSplit; import com.gwtplatform.mvp.client.proxy.PlaceManager; import com.gwtplatform.mvp.client.proxy.ProxyPlace; import com.gwtplatform.mvp.shared.proxy.PlaceRequest; import com.gwtplatform.mvp.shared.proxy.PlaceRequest.Builder; public class ManufacturerDetailPresenter extends Presenter<MyView, MyProxy> implements GoBackEvent.GoBackHandler, ActionBarEvent.ActionBarHandler, ManufacturerDetailUiHandlers { interface MyView extends View, HasUiHandlers<ManufacturerDetailUiHandlers> { void edit(ManufacturerDto manufacturerDto); void getManufacturer(); } @ProxyCodeSplit @NameToken(NameTokens.DETAIL_MANUFACTURER) interface MyProxy extends ProxyPlace<ManufacturerDetailPresenter> { } private final ResourceDelegate<ManufacturersResource> manufacturersDelegate; private final PlaceManager placeManager; private final EditManufacturerMessages messages; private ManufacturerDto currentManufacturer; private Boolean createNew; @Inject ManufacturerDetailPresenter(EventBus eventBus, MyView view, MyProxy proxy, ResourceDelegate<ManufacturersResource> manufacturersDelegate, PlaceManager placeManager, EditManufacturerMessages messages) { super(eventBus, view, proxy, ApplicationPresenter.SLOT_MAIN_CONTENT); this.manufacturersDelegate = manufacturersDelegate; this.placeManager = placeManager; this.messages = messages; getView().setUiHandlers(this); } @Override public void prepareFromRequest(PlaceRequest request) { String param = request.getParameter("id", null); createNew = Strings.isNullOrEmpty(param); if (!createNew) { Long id = Long.parseLong(param); manufacturersDelegate.withCallback(new AbstractAsyncCallback<ManufacturerDto>() { @Override public void onSuccess(ManufacturerDto manufacturer) { currentManufacturer = manufacturer; getView().edit(currentManufacturer); } }).get(id); } else { currentManufacturer = new ManufacturerDto(); getView().edit(currentManufacturer); } } @Override public void onGoBack(GoBackEvent event) { placeManager.revealPlace(new Builder().nameToken(NameTokens.getManufacturer()).build()); } @Override public void onActionEvent(ActionBarEvent event) { if (event.isTheSameToken(NameTokens.getDetailManufacturer())) { switch (event.getActionType()) { case UPDATE: getView().getManufacturer(); break; case DONE: getView().getManufacturer(); break; case DELETE: deleteManufacturer(); break; } } } @Override public void onSave(ManufacturerDto manufacturerDto) { manufacturersDelegate .withCallback(new ErrorHandlerAsyncCallback<ManufacturerDto>(this) { @Override public void onSuccess(ManufacturerDto savedManufacturerDto) { DisplayMessageEvent.fire(ManufacturerDetailPresenter.this, new Message(messages.manufacturerSaved(), MessageStyle.SUCCESS)); placeManager.revealPlace(new Builder().nameToken(NameTokens.getManufacturer()).build()); } }).saveOrCreate(manufacturerDto); } @Override protected void onBind() { addRegisteredHandler(GoBackEvent.getType(), this); addRegisteredHandler(ActionBarEvent.getType(), this); } @Override protected void onReveal() { List<ActionType> actions; if (createNew) { actions = Arrays.asList(ActionType.DONE); ChangeActionBarEvent.fire(this, actions, false); } else { actions = Arrays.asList(ActionType.DELETE, ActionType.UPDATE); ChangeActionBarEvent.fire(this, actions, false); } } private void deleteManufacturer() { Boolean confirm = Window.confirm("Are you sure you want to delete " + currentManufacturer.getName() + "?"); if (confirm) { manufacturersDelegate.withCallback(new ErrorHandlerAsyncCallback<Void>(this) { @Override public void onSuccess(Void nothing) { placeManager.revealPlace(new Builder().nameToken(NameTokens.getManufacturer()).build()); } }).delete(currentManufacturer.getId()); } } }