如何在命令中传递对象参数?

I created an eclipse-rcp's project's plugin.xml with a new command with a parameter.

我创建了一个eclipse-rcp项目的插件。带有参数的新命令的xml。

 ArrayList<parameterization> parameters = new ArrayList<parameterization>();
 IParameter iparam;

 //get the command from plugin.xml
IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
 ICommandService cmdService =     (ICommandService)window.getService(ICommandService.class);
 Command cmd = cmdService.getCommand("org.ipiel.demo.commands.click");

//get the parameter
iparam = cmd.getParameter("org.ipiel.demo.commands.click.paramenter1");
Parameterization params = new Parameterization(iparam, "commandValue");
parameters.add(params);

//build the parameterized command
 ParameterizedCommand pc = new ParameterizedCommand(cmd, parameters.toArray(new       Parameterization[parameters.size()]));

//execute the command
 IHandlerService handlerService = (IHandlerService)window.getService(IHandlerService.class);
handlerService.executeCommand(pc, null);

I tried this example to pass parameters and it worked.

我试过这个例子来传递参数，它起作用了。

The issue in this example that I could pass only parameters of type String. ( because Parameterization )

这个例子中的问题是，我只能传递类型字符串的参数。(因为参数化)

I want to pass parameter of hash map and in general to pass any object.

我想要传递哈希映射的参数，并在一般情况下传递任何对象。

I tried this code

我试着这段代码

     IServiceLocator serviceLocator = PlatformUI.getWorkbench();
    ICommandService commandService = (ICommandService)      serviceLocator.getService(ICommandService.class);




    ExecutionEvent executionEvent = new ExecutionEvent(cmd, paramArray, null, null);
    cmd.executeWithChecks(executionEvent);

but it didn't work the parameters didn't move ( it was null)

但是它没有工作参数没有移动(它是空的)

Could you please help to to move object as parameter in command ?

你能帮忙把物体作为参数移动到命令里吗?

3 个解决方案

#1

Since it would get confusing to add another solution to my first answer, I'll provide another one for a second solution. The choices I gave were " A) use the selected object of the "Execution Event" (examine that, it contains a lot of infos). B) you can use AbstractSourceProvider, so you can pass your object to the application context."

因为在我的第一个答案中添加另一个解决方案会让人感到困惑，所以我将为第二个解决方案提供另一个解决方案。我给出的选项是“A)使用“执行事件”的选择对象(检查它，它包含许多信息)。您可以使用AbstractSourceProvider，这样您就可以将您的对象传递给应用程序上下文。

A) can be used in your Handler if your object is the selection of a Structured Object like a Tree:

如果对象是像树这样的结构化对象的选择，则可以在处理程序中使用它:

MyObject p = (MyObject) ((IStructuredSelection) HandlerUtil.getCurrentSelection(event)).getFirstElement();

B) The usage of a Source provider is a bit more tricky. The main idea is, that you add your object to the application context. The important snippets for Eclipse 3.x from a project that I set up after I read this blog (note: it is in german and the example it provides doesn't work): In your plugin.xml add:

B)源提供程序的使用有点棘手。主要思想是，将对象添加到应用程序上下文。Eclipse 3的重要片段。我在阅读完这个博客后建立的一个项目(注意:它是德语的，它提供的例子不适用):在你的插件中。xml添加:

  <extension point="org.eclipse.ui.services">
  <sourceProvider
        provider="com.voo.example.sourceprovider.PersonSourceProvider">
     <variable
           name="com.voo.example.sourceprovider.currentPerson"
           priorityLevel="activePartId">
     </variable>
  </sourceProvider>

Set up your own SourceProvider. Calling the "getCurrentState" you can get the variable (your Person object in this case) of that SourceProvider:

设置自己的SourceProvider。调用“getCurrentState”，您可以获得该SourceProvider的变量(您的Person对象):

public class PersonSourceProvider extends AbstractSourceProvider{

/** This is the variable that is used as reference to the SourceProvider
 */
public static final String PERSON_ID = "com.voo.example.sourceprovider.currentPerson";
private Person currentPerson;

public PersonSourceProvider() {

}

@Override
public void dispose() {
    currentPerson = null;
}

**/**
 * Used to get the Status of the source from the framework
 */
@Override
public Map<String, Person> getCurrentState() {
    Map<String, Person> personMap = new HashMap<String, Person>();
    personMap.put(PERSON_ID, currentPerson);
    return personMap;
}**

@Override
public String[] getProvidedSourceNames() {
    return new String[]{PERSON_ID};
}

public void personChanged(Person p){
    if (this.currentPerson != null && this.currentPerson.equals(p)){
        return;
    }

    this.currentPerson = p;
    fireSourceChanged(ISources.ACTIVE_PART_ID, PERSON_ID, this.currentPerson);
}

}

In your View you register to the SourceProvider and set the Object to the object you want to transfer to your Handler.

在您的视图中，您向SourceProvider注册，并将对象设置为您想要传输到处理程序的对象。

public void createPartControl(Composite parent) {

    viewer = new TreeViewer(parent);
    viewer.setLabelProvider(new ViewLabelProvider());
    viewer.setContentProvider(new ViewContentProvider());
    viewer.setInput(rootPerson);
    getSite().setSelectionProvider(viewer);
    viewer.addSelectionChangedListener(new ISelectionChangedListener() {
        @Override
        public void selectionChanged(SelectionChangedEvent event) {
            Person p = null;
            if (event.getSelection() instanceof TreeSelection) {
                TreeSelection selection = (TreeSelection) event.getSelection();
                if (selection.getFirstElement() instanceof Person) {
                    p = (Person) selection.getFirstElement();
                }
            }
            if (p==null) {
                return;
            }
            IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
            ISourceProviderService service = (ISourceProviderService) window.getService(ISourceProviderService.class);
            PersonSourceProvider sourceProvider = (PersonSourceProvider) service.getSourceProvider(PersonSourceProvider.PERSON_ID);
            sourceProvider.personChanged(p);
        }
    });
}

And in your Handler you can just call the PersonSourceProvider#getCurrentState to get your Objects back.

在您的处理程序中，您可以调用PersonSourceProvider#getCurrentState来将对象返回。

Advantage of this method is, that you can use the Objectd anywhere you want. E.g. you can even set up a PropertyTester to enable/disable UI elements according to the currently selected Object.

这种方法的优点是，您可以在任何需要的地方使用Objectd。您甚至可以根据当前选择的对象设置PropertyTester来启用/禁用UI元素。

3 个解决方案

#1

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