Java tutorial
/* * Copyright 2014-2015 CyberVision, 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.kaaproject.avro.ui.sandbox.client.mvp.activity; import java.util.ArrayList; import java.util.List; import org.kaaproject.avro.ui.gwt.client.util.BusyAsyncCallback; import org.kaaproject.avro.ui.sandbox.client.AvroUiSandbox; import org.kaaproject.avro.ui.sandbox.client.mvp.ClientFactory; import org.kaaproject.avro.ui.sandbox.client.mvp.place.MainPlace; import org.kaaproject.avro.ui.sandbox.client.mvp.view.FormConstructorView; import org.kaaproject.avro.ui.sandbox.client.mvp.view.MainView; import org.kaaproject.avro.ui.sandbox.client.servlet.ServletHelper; import org.kaaproject.avro.ui.sandbox.client.util.Utils; import org.kaaproject.avro.ui.shared.RecordField; import com.google.gwt.activity.shared.AbstractActivity; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.event.shared.EventBus; import com.google.gwt.event.shared.HandlerRegistration; import com.google.gwt.user.client.rpc.AsyncCallback; import com.google.gwt.user.client.ui.FormPanel; import com.google.gwt.user.client.ui.AcceptsOneWidget; public class MainActivity extends AbstractActivity { private final ClientFactory clientFactory; private MainView view; private List<HandlerRegistration> registrations = new ArrayList<HandlerRegistration>(); public MainActivity(MainPlace place, ClientFactory clientFactory) { this.clientFactory = clientFactory; } @Override public void start(AcceptsOneWidget containerWidget, EventBus eventBus) { view = clientFactory.getMainView(); bind(eventBus); containerWidget.setWidget(view.asWidget()); view.getRecordConstructorView().getGenerateRecordButton().setEnabled(false); view.getRecordConstructorView().getGenerateRecordButton().setVisible(false); } @Override public void onStop() { for (HandlerRegistration registration : registrations) { registration.removeHandler(); } registrations.clear(); } private void bind(final EventBus eventBus) { final FormConstructorView schemaConstructor = view.getSchemaConstructorView(); registrations.add(schemaConstructor.getGenerateRecordButton().addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { doGenerateRecordForm(); } })); registrations.add(schemaConstructor.getShowJsonButton().addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { showSchemaJson(); schemaConstructor.fireChanged(); } })); registrations.add(schemaConstructor.getUploadJSONButton().addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { uploadSchemaFromJson(); } })); registrations.add(schemaConstructor.getUploadFileForm() .addSubmitCompleteHandler(new FormPanel.SubmitCompleteHandler() { @Override public void onSubmitComplete(FormPanel.SubmitCompleteEvent submitCompleteEvent) { String result = submitCompleteEvent.getResults(); if ("".equals(result)) { view.setErrorMessage(Utils.constants.uploadEmptyFileError()); } else { schemaConstructor.setFormJson(result); } } })); registrations.add(schemaConstructor.getDownloadJsonButton().addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { String json = schemaConstructor.getFormJson().getValue(); AvroUiSandbox.getAvroUiSandboxService().uploadJsonToFile(json, new BusyAsyncCallback<String>() { @Override public void onSuccessImpl(String result) { ServletHelper.downloadJsonSchema(result); } @Override public void onFailureImpl(Throwable caught) { view.setErrorMessage(Utils.getErrorMessage(caught)); } }); } })); final FormConstructorView recordConstructor = view.getRecordConstructorView(); registrations.add(recordConstructor.getShowJsonButton().addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { showRecordJson(); recordConstructor.fireChanged(); } })); registrations.add(recordConstructor.getUploadJSONButton().addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { uploadRecordFromJson(); } })); registrations.add(recordConstructor.getUploadFileForm() .addSubmitCompleteHandler(new FormPanel.SubmitCompleteHandler() { @Override public void onSubmitComplete(FormPanel.SubmitCompleteEvent submitCompleteEvent) { String result = submitCompleteEvent.getResults(); if ("".equals(result)) { view.setErrorMessage(Utils.constants.uploadEmptyFileError()); } else { recordConstructor.setFormJson(result); } } })); registrations.add(recordConstructor.getDownloadJsonButton().addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { String json = recordConstructor.getFormJson().getValue(); AvroUiSandbox.getAvroUiSandboxService().uploadJsonToFile(json, new BusyAsyncCallback<String>() { @Override public void onSuccessImpl(String result) { ServletHelper.downloadJsonRecord(result); } @Override public void onFailureImpl(Throwable caught) { view.setErrorMessage(Utils.getErrorMessage(caught)); } }); } })); registrations.add(clientFactory.getHeaderView().getResetButton().addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { view.reset(); loadEmptySchemaForm(); } })); view.reset(); loadEmptySchemaForm(); } private void doGenerateRecordForm() { RecordField schemaForm = view.getSchemaConstructorView().getValue(); AvroUiSandbox.getAvroUiSandboxService().getJsonStringFromSchemaForm(schemaForm, new AsyncCallback<String>() { @Override public void onFailure(Throwable caught) { view.setErrorMessage(Utils.getErrorMessage(caught)); } @Override public void onSuccess(String result) { view.clearMessages(); AvroUiSandbox.getAvroUiSandboxService().generateFormFromSchema(result, new BusyAsyncCallback<RecordField>() { @Override public void onSuccessImpl(RecordField result) { view.clearMessages(); view.getRecordConstructorView().setValue(result, true); } @Override public void onFailureImpl(Throwable caught) { view.setErrorMessage(Utils.getErrorMessage(caught)); } }); } }); } private void showRecordJson() { RecordField recordField = view.getRecordConstructorView().getValue(); view.clearMessages(); if (recordField != null && recordField.isValid()) { AvroUiSandbox.getAvroUiSandboxService().getJsonStringFromRecord(recordField, new BusyAsyncCallback<String>() { @Override public void onSuccessImpl(String result) { view.clearMessages(); view.getRecordConstructorView().setFormJson(result); } @Override public void onFailureImpl(Throwable caught) { view.setErrorMessage(Utils.getErrorMessage(caught)); } }); } else { view.setErrorMessage(Utils.constants.unableToGenerateJsonIncompleteRecordForm()); view.getRecordConstructorView().setFormJson(""); } } private void uploadRecordFromJson() { RecordField schemaForm = view.getSchemaConstructorView().getValue(); AvroUiSandbox.getAvroUiSandboxService().getJsonStringFromSchemaForm(schemaForm, new AsyncCallback<String>() { @Override public void onFailure(Throwable caught) { view.setErrorMessage(Utils.getErrorMessage(caught)); } @Override public void onSuccess(String avroSchema) { view.clearMessages(); String json = view.getRecordConstructorView().getFormJson().getValue(); AvroUiSandbox.getAvroUiSandboxService().generateFormDataFromJson(avroSchema, json, new BusyAsyncCallback<RecordField>() { @Override public void onSuccessImpl(RecordField result) { view.clearMessages(); view.getRecordConstructorView().setValue(result, true); } @Override public void onFailureImpl(Throwable caught) { view.setErrorMessage(Utils.getErrorMessage(caught)); } }); } }); } private void showSchemaJson() { RecordField schemaField = view.getSchemaConstructorView().getValue(); if (schemaField != null && schemaField.isValid()) { AvroUiSandbox.getAvroUiSandboxService().getJsonStringFromSchemaForm(schemaField, new BusyAsyncCallback<String>() { @Override public void onSuccessImpl(String result) { view.clearMessages(); view.getSchemaConstructorView().setFormJson(result); } @Override public void onFailureImpl(Throwable caught) { view.setErrorMessage(Utils.getErrorMessage(caught)); } }); } else { view.clearMessages(); view.getSchemaConstructorView().setFormJson(""); } } private void uploadSchemaFromJson() { String avroSchema = view.getSchemaConstructorView().getFormJson().getValue(); AvroUiSandbox.getAvroUiSandboxService().generateSchemaFormFromSchema(avroSchema, new BusyAsyncCallback<RecordField>() { @Override public void onSuccessImpl(RecordField result) { view.clearMessages(); view.getSchemaConstructorView().setValue(result, true); } @Override public void onFailureImpl(Throwable caught) { view.setErrorMessage(Utils.getErrorMessage(caught)); } }); } private void loadEmptySchemaForm() { AvroUiSandbox.getAvroUiSandboxService().getEmptySchemaForm(new BusyAsyncCallback<RecordField>() { @Override public void onSuccessImpl(RecordField result) { view.clearMessages(); view.getSchemaConstructorView().setValue(result, true); } @Override public void onFailureImpl(Throwable caught) { view.setErrorMessage(Utils.getErrorMessage(caught)); } }); } }