Develop Reference

When I run the Codename One HelloWorld Java Program from the Codename One HelloWorld Tutorial, I get an error

When I run the Codename One HelloWorld Java Program from the Codename One HelloWorld Tutorial video, I get this error:
java: cannot find symbol
symbol: class Button
location: class com.acmecorp.appname.AppName
I think I'm missing an import for class Button. How do I add the import statement for class Button so that the compilation won't have this error?
Here is my source code:
package com.acmecorp.appname;
import static com.codename1.ui.CN.*;
import com.codename1.ui.Display;
import com.codename1.ui.Form;
import com.codename1.ui.Dialog;
import com.codename1.ui.Label;
import com.codename1.ui.plaf.UIManager;
import com.codename1.ui.util.Resources;
import com.codename1.io.Log;
import com.codename1.ui.Toolbar;
import java.io.IOException;
import com.codename1.ui.layouts.BoxLayout;
import com.codename1.io.NetworkEvent;
/**
* This file was generated by Codename One for the purpose
* of building native mobile applications using Java.
*/
public class AppName {
private Form current;
private Resources theme;
public void init(Object context) {
// use two network threads instead of one
updateNetworkThreadCount(2);
theme = UIManager.initFirstTheme("/theme");
// Enable Toolbar on all Forms by default
Toolbar.setGlobalToolbar(true);
// Pro only feature
Log.bindCrashProtection(true);
addNetworkErrorListener(err -> {
// prevent the event from propagating
err.consume();
if(err.getError() != null) {
Log.e(err.getError());
}
Log.sendLogAsync();
Dialog.show("Connection Error", "There was a networking error in the connection to " + err.getConnectionRequest().getUrl(), "OK", null);
});
}
public void start() {
if(current != null){
current.show();
return;
}
Form hi = new Form("Hi World", BoxLayout.y());
hi.add(new Label("Hi World"));
Button b = new Button("Show Dialog");
hi.add(b);
b.addActionListener((e) -> Dialog.show("Dialog Title", "Hi", "OK", null));
hi.show();
}
public void stop() {
current = getCurrentForm();
if(current instanceof Dialog) {
((Dialog)current).dispose();
current = getCurrentForm();
}
}
public void destroy() {
}
}

I guess this com.codename1.ui.Button might works for u.

Android Handler is null during testing with junit

I'm trying to test my network module. When I run this on simulator or device, handler is ok, but when I'm trying to do it from tests, handler = null and callback doesn't get called. How can I solve this problem?
public void performCall(Call callToPerform){
callToPerform.call.enqueue(new okhttp3.Callback() {
Handler handler = new Handler();
#Override
public void onFailure(okhttp3.Call call, IOException e) {
handler.post(() -> {
for (Callback callback : callToPerform.callbacks) {
callback.onFailure(callToPerform, e);
}
});
}
#Override
public void onResponse(okhttp3.Call call, final okhttp3.Response response){
handler.post(() -> {
for (Callback callback : callToPerform.callbacks) {
try {
callback.onResponse(callToPerform, new Response(response.body().bytes(), response.headers().toMultimap()));
} catch (IOException e) {
callback.onFailure(call, e);
}
}
});
}
});
}
My graddle app file contains this params.
testOptions {
unitTests.returnDefaultValues = true
}

Ok, after a few hours of research I've found solution and it's similar to this:
package com.dpmedeiros.androidtestsupportlibrary;
import android.os.Handler;
import android.os.Looper;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import org.powermock.api.mockito.PowerMockito;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import static org.mockito.Mockito.*;
/**
* Utility methods that unit tests can use to do common android library mocking that might be needed.
*/
public class AndroidMockUtil {
private AndroidMockUtil() {}
/**
* Mocks main thread handler post() and postDelayed() for use in Android unit tests
*
* To use this:
* <ol>
* <li>Call this method in an {#literal #}Before method of your test.</li>
* <li>Place Looper.class in the {#literal #}PrepareForTest annotation before your test class.</li>
* <li>any class under test that needs to call {#code new Handler(Looper.getMainLooper())} should be placed
* in the {#literal #}PrepareForTest annotation as well.</li>
* </ol>
*
* #throws Exception
*/
public static void mockMainThreadHandler() throws Exception {
PowerMockito.mockStatic(Looper.class);
Looper mockMainThreadLooper = mock(Looper.class);
when(Looper.getMainLooper()).thenReturn(mockMainThreadLooper);
Handler mockMainThreadHandler = mock(Handler.class);
Answer<Boolean> handlerPostAnswer = new Answer<Boolean>() {
#Override
public Boolean answer(InvocationOnMock invocation) throws Throwable {
Runnable runnable = invocation.getArgumentAt(0, Runnable.class);
Long delay = 0L;
if (invocation.getArguments().length > 1) {
delay = invocation.getArgumentAt(1, Long.class);
}
if (runnable != null) {
mainThread.schedule(runnable, delay, TimeUnit.MILLISECONDS);
}
return true;
}
};
doAnswer(handlerPostAnswer).when(mockMainThreadHandler).post(any(Runnable.class));
doAnswer(handlerPostAnswer).when(mockMainThreadHandler).postDelayed(any(Runnable.class), anyLong());
PowerMockito.whenNew(Handler.class).withArguments(mockMainThreadLooper).thenReturn(mockMainThreadHandler);
}
private final static ScheduledExecutorService mainThread = Executors.newSingleThreadScheduledExecutor();
}

If you run this sample code on JUnit, this will not work because JUnit tests are running on a JVM, and Instrumented tests are running on a Simulator or Real Device
You can take a look at this link, it explains why :
Instrumented tests or Local tests

Extension of `MavenProjectWizard` possible?

What I want: I have an editor plug-in for my custom DSL. I want to offer the user to set up a new DSL project with a project wizard. Normally these projects are Maven projects, so I want to provide setting up the project directly as a Maven project. To do that I want to extend the class MavenProjectWizardin the package org.eclipse.m2e.core.ui.internal.wizards.MavenProjectWizard and then add another wizard page with the details regarding the DSL project.
What I have: This is my try to do it at the moment:
/*
* Copyright (c) 2017 RWTH Aachen. All rights reserved.
*
* http://www.se-rwth.de/
*/
package de.se_rwth.transformationeditor.wizard;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.m2e.core.ui.internal.wizards.MavenProjectWizard;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.wizards.newresource.BasicNewResourceWizard;
import jline.internal.Log;
/**
* Offers a wizard to create a new Transformation project
*
* #author (last commit) $Philipp Nolte$
* #version $Revision$, $12.1.2017$
* #since 0.0.3
*/
#SuppressWarnings("restriction")
public class CDProjectWizard extends MavenProjectWizard{
protected CDWizardPageOne one;
protected WizardPage currentPage;
private IWorkbench workbench;
public CDProjectWizard() {
super();
}
/**
* #see org.eclipse.jface.wizard.IWizard#addPages()
*/
#Override
public void addPages() {
one = new CDWizardPageOne();
addPage(one);
super.addPages();
}
/**
* #see org.eclipse.ui.wizards.newresource.BasicNewProjectResourceWizard#init(org.eclipse.ui.IWorkbench,
* org.eclipse.jface.viewers.IStructuredSelection)
*/
#Override
public void init(IWorkbench workbench, IStructuredSelection selection) {
super.init(workbench, selection);
this.workbench = workbench;
}
/**
* #see org.eclipse.jface.wizard.IWizard#getWindowTitle()
*/
#Override
public String getWindowTitle() {
return "New Class Diagram Transformation Project";
}
/**
* Creates a new Transformation project with the project name given in the
* wizard. Inside this project a new folder named "Transformations" is
* created. If a project with the same name already exists, an error window is
* shown. In addition to that, checks if user wants to create CD or MA xample
* files and creates them if wanted.
*
* #see org.eclipse.jface.wizard.IWizard#performFinish()
*/
#Override
public boolean performFinish() {
if (this.canFinish()) {
// Create new project
String projectName = this.one.getProjectNameText();
IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
IProject project = root.getProject(projectName);
try {
if (!project.exists()) {
project.create(null);
}
else {
project.refreshLocal(IResource.DEPTH_INFINITE, null);
MessageDialog.openError(this.workbench.getActiveWorkbenchWindow().getShell(),
"Project creation error", "Project with this name already exists");
return false;
}
if (!project.isOpen()) {
project.open(null);
}
String transformationFolderName = "Transformations";
// Check subfolder name
if (!one.getRootFolderText().isEmpty()) {
transformationFolderName = one.getRootFolderText();
}
IFolder binFolder = project.getFolder(transformationFolderName);
if (!binFolder.exists()) {
one.createNewFolder(binFolder, false, true, null);
// Checks if user wants to create a CD example file
if (one.createCDExampleFile()) {
InputStream demoFileContents = null;
try {
// If the user wants to, an example file is created
URL url = new URL("platform:/plugin/cdtrans-editor/src/main/resources/exampleFiles/RefactorCDs");
InputStream inputStream = url.openConnection().getInputStream();
binFolder.getFile("RefactorCDs.cdtr").create(inputStream, true, null);
}
catch (IOException e) {
Log.error("TransProjectWizard: Error while creating Demo file", e);
MessageDialog.openError(this.workbench.getActiveWorkbenchWindow().getShell(),
"Example file creation error", "There was an error while creating the example file");
}
finally {
if (demoFileContents != null) {
try {
demoFileContents.close();
}
catch (IOException e) {
Log.error("TransProjectWizard: Error while closing file stream", e);
}
}
}
}
BasicNewResourceWizard.selectAndReveal(binFolder, this.workbench.getActiveWorkbenchWindow());
}
}
catch (CoreException e) {
Log.error("TransProjectWizard: Error while creating new Project", e);
}
}
return true;
}
}
But if I start this there is a runtime error if I try to open the wizard which says:
I already tried to export the plug-in and install it in a fresh Eclipse installation, where the m2e package is installed, but with the same result.
Any thoughts on how to fix it?

Minecraft Forge Item Block Render Issue

I am having an item block rendering issue, as when I place the block, it renders correctly, but when I hold it in my hand, it has a missing texture/model.
An image of what I see is in the link: http://i.stack.imgur.com/atq1L.png
I have checked many times for the reason, and there is no error message in the console, there does not appear to be any problems with the JSON formatting, and there seems to be no problem in the code.
*By the way, the code for the block class is not too important because it is just a class that extends *Block.class, then gives the super with Material.stone
Here is my code for my blocks class:
package com.kraftymods.luckyblocks.init;
import com.kraftymods.luckyblocks.blocks.LuckyBlock;
import com.kraftymods.luckyblocks.blocks.itemblocks.LuckyBlockItem;
import com.kraftymods.luckyblocks.main.Reference;
import net.minecraft.block.Block;
import net.minecraft.client.Minecraft;
import net.minecraft.client.resources.model.ModelResourceLocation;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.item.Item;
import net.minecraftforge.fml.common.registry.GameRegistry;
public class Blocks {
public static Block luckyblock;
public static void init(){
luckyblock = new LuckyBlock().setUnlocalizedName("luckyblock")[enter image description here][1].setCreativeTab(CreativeTabs.tabMisc);
}
public static void register(){
GameRegistry.registerBlock(luckyblock, LuckyBlockItem.class, luckyblock.getUnlocalizedName().substring(5));
}
public static void registerRenders(){
registerRender(luckyblock);
}
private static void registerRender(Block block){
Item item = Item.getItemFromBlock(block);
Minecraft.getMinecraft().getRenderItem().getItemModelMesher().register(item, 0, new ModelResourceLocation(Reference.MODID + ":" + item.getUnlocalizedName().substring(5), "inventory"));
}
}
Here is the code for my JSON files:
Blockdata:
{
"variants": {
"normal": { "model": "luckyblocks:luckyblock" }
}
}
Block Model:
{
"parent": "block/cube_all",
"textures": {
"all": "luckyblocks:blocks/luckyblock"
}
}
Item Model:
{
"parent": "luckyblocks:block/luckyblock",
"display": {
"thirdperson": {
"rotation": [ 10, -45, 170 ],
"translation": [ 0, 1.5, -2.75 ],
"scale": [ 0.375, 0.375, 0.375 ]
}
}
}
I appreciate the time you took to read this

Please make a class for clientside purposes in which you register your renderers
I have this for example:
public final class BlockRenderRegister {
public static void registerBlockRenderer() {
register(BlocksLibrary.blockDarkStone);
}
public static void register(Block block) {
Minecraft.getMinecraft().getRenderItem().getItemModelMesher()
.register(Item.getItemFromBlock(block),
0,
new ModelResourceLocation(
ModHooks.MODID.toLowerCase() + ":" + BlocksLibrary.DARKSTONE,
"inventory"
)
);
}
}
And for loading your blocks I also suggest a seperate class(just for maintenance purposes
public class BlockLoader {
/**
* Loads all blocks into memory
* and populates the BlocksLibary
* with decent values.
*/
public static void loadBlocks() {
GameRegistry.registerBlock(
BlocksLibrary.blockDarkStone = new BlockDarkStone(Material.rock),
BlocksLibrary.DARKSTONE
);
}
}
I register the blocks in the PreInit event so the game knows my blocks.
#EventHandler
public void preInit(FMLPreInitializationEvent e) {
BlockLoader.loadBlocks();
}
And I call this from the FMLInitializationEvent in my main mod class to register the renderers.
#EventHandler
public void init(FMLInitializationEvent event) {
BlockRenderRegister.registerBlockRenderer();
}

Page Expiration in Java(Wicket)

I'm writing a wicket project for a social network.In my project i have authentication so when a user enter address of the home page he is redirected to login page in this way:
public class MyApplication extends WebApplication {
private Folder uploadFolder = null;
#Override
public Class getHomePage() {
return UserHome.class;
}
public Folder getUploadFolder()
{
return uploadFolder;
}
#Override
protected void init() {
super.init();
// Disable the Ajax debug label!
//getDebugSettings().setAjaxDebugModeEnabled(false);
this.getMarkupSettings().setDefaultMarkupEncoding("UTF-8");
this.getRequestCycleSettings().setResponseRequestEncoding("UTF-8");
mountBookmarkablePage("/BossPage", BossPage.class);
mountBookmarkablePage("/Branch", EditProfile.class);
mountBookmarkablePage("/SA", SuperAdmin.class);
mountBookmarkablePage("/Admin", ir.pnusn.branch.ui.pages.administratorPages.EditProfile.class);
mountBookmarkablePage("/Student", StudentSignUP.class);
mountBookmarkablePage("/Student/Test", StudentSignUpConfirm.class);
mountBookmarkablePage("/Branch/categories.xml", CategoriesXML.class);
get().getPageSettings().setAutomaticMultiWindowSupport(true);
getResourceSettings().setThrowExceptionOnMissingResource(false);
uploadFolder = new Folder("C:\\", "wicket-uploads");
uploadFolder.mkdirs();
this.getSecuritySettings().setAuthorizationStrategy(WiaAuthorizationStrategy.getInstance());
this.getSecuritySettings().setUnauthorizedComponentInstantiationListener(WiaAuthorizationStrategy.getInstance());
addComponentInstantiationListener(new IComponentInstantiationListener() {
public void onInstantiation(final Component component) {
if (!getSecuritySettings().getAuthorizationStrategy().isInstantiationAuthorized(component.getClass())) {
try {
getSecuritySettings().getUnauthorizedComponentInstantiationListener().onUnauthorizedInstantiation(component);
} catch (Exception e) {
System.out.println("ERRORRRRRRR:" + e.toString());
}
}
}
});
}
}
and my WiaAuthorizationStrategy class is like this which will get page names and user roles from a xml file by name Realm.xml :
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package ir.pnusn.ui.library;
import ir.pnusn.authentication.RealmPolicy;
import ir.pnusn.authentication.ui.pages.Login;
import org.apache.wicket.Component;
import org.apache.wicket.RestartResponseAtInterceptPageException;
import org.apache.wicket.authorization.Action;
import org.apache.wicket.authorization.IAuthorizationStrategy;
import org.apache.wicket.authorization.IUnauthorizedComponentInstantiationListener;
public final class WiaAuthorizationStrategy implements
IAuthorizationStrategy,
IUnauthorizedComponentInstantiationListener {
private RealmPolicy roleManager;
private static WiaAuthorizationStrategy instance;
private WiaAuthorizationStrategy() {
roleManager = RealmPolicy.getInstance();
}
public static WiaAuthorizationStrategy getInstance() {
if(instance == null)
instance = new WiaAuthorizationStrategy();
return instance;
}
public boolean isInstantiationAuthorized(Class componentClass) {
if (ProtectedPage.class.isAssignableFrom(componentClass)) {
if (WiaSession.get().getUser() == null) {
return false;
}
if(!roleManager.isAuthorized(WiaSession.get().getUser().getRole(), componentClass.getName()))//WiaSession.get().isAuthenticated();
{
WiaSession.get().setAccess(false);
return false;
}
else
return true;
}
return true;
}
public void onUnauthorizedInstantiation(Component component) {
throw new RestartResponseAtInterceptPageException(
Login.class);
}
public boolean isActionAuthorized(Component component, Action action) {
//System.out.println("Name:" + component.getClass().getName() + "\n Action:" + action.getName() + "\nUser:" + WiaSession.get().getUser());
if (action.equals(Component.RENDER)) {
if (roleManager.containClass(component.getClass().getName()))
{
if (WiaSession.get().getUser() != null) {
if(!roleManager.isAuthorized(WiaSession.get().getUser().getRole(), component.getClass().getName()))
{
WiaSession.get().setAccess(false);
return false;
}
return true;
}
return false;
}
}
return true;
}
}
in this situation i have a googlemap in one of my protectedpage and because googlemap needs to read data for loading builing from a xml so i create a servlet which will create it dynamicly depending on the Username. this servlet is below:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package ir.pnusn.branch.ui.pages;
import ir.pnusn.branch.database.BranchNotFoundException;
import ir.pnusn.branch.database.DatabaseException;
import ir.pnusn.branch.facade.admin.branchDataEnter.BranchDataSubmitFacade;
import ir.pnusn.branch.facade.admin.branchDataEnter.BuildingBean;
import java.util.Iterator;
import java.util.List;
import org.apache.wicket.PageParameters;
import org.apache.wicket.RequestCycle;
import org.apache.wicket.markup.html.WebPage;
/**
*
* #author mohammad
*/
public class CategoriesXML extends WebPage
{
public CategoriesXML(PageParameters parameters)
{
System.out.println("user " + parameters.getString("user"));
StringBuilder builder = new StringBuilder("<markers>");
List<BuildingBean> buildings;
try
{
buildings = BranchDataSubmitFacade.createBranchDataSubmitFacade(parameters.getString("user")).getBranchSecondPageData();
for (Iterator<BuildingBean> it = buildings.iterator(); it.hasNext();)
{
BuildingBean buildingBean = it.next();
builder.append("<marker lat=\"");
builder.append(buildingBean.getLatit());
builder.append("\" lng=\"");
builder.append(buildingBean.getLongit());
builder.append("\"");
builder.append(" address=\"");
builder.append(buildingBean.getDesctiption());
builder.append("\" category=\"branch\" name=\"");
builder.append(buildingBean.getBuildingName());
builder.append("\"/>");
}
builder.append("</markers>");
}
catch (DatabaseException ex)
{
builder = new StringBuilder("<markers></markers>");
}
catch (BranchNotFoundException ex)
{
builder = new StringBuilder("<markers></markers>");
}
RequestCycle.get().getResponse().println(builder.toString());
/*"<markers>" +
"<marker lat=\"35.69187\" lng=\"51.413269\" address=\"Some stuff to display in the First Info Window\" category=\"branch\" name=\"gholi\"/>" +
"<marker lat=\"52.91892\" lng=\"78.89231\" address=\"Some stuff to display in the Second Info Window\" category=\"branch\" name=\"taghi\"/>" +
"<marker lat=\"40.82589\" lng=\"35.10040\" address=\"Some stuff to display in the Third Info Window\" category=\"branch\" name=\"naghi\"/>" +
"</markers> "**/
}
}
I have made this page at first protected and so the user had to loged in to have access this xml but after lot's of debuging i found that googlemap can't log in my system so instead of parsing the dataxml it pars login page html az input. so i changed the extention of the CategoriesXML to extend WebPage.
But now I have another problem:
When i go to the google map page in my Social site I can Not refresh the page because It expires and so I cannot add another building to my data xml.
what should I do?
tell me if you need more code or information

In trying to close this question, which the OP seems to have pretty much abandoned, I'll just post my old comment as an answer..:
In your CategoriesXML I would highly advise against building and adding your tags as Strings and adding them to pages just like that. See if you can work this into a in your .xml(?) file instead, as that's the Wicket way to do things (and as such just might solve the problems you're having)

Would making this WebPage extends org.apache.wicket.Page instead and associate the markup to return as xml instead of html? Basically, mimicking a WebPage, but implementing it for XML.