如何从GWT编辑器类访问底层的POJO [英] How to get access to underlying POJO from GWT Editor class

问题描述

我在POJO中有一个HashMap，我正在使用GWT中的Editor框架进行编辑。虽然我可以访问通过getter / setter绑定的标准成员变量，但我不知道如何访问HashMap中的值。我如何访问正在使用SimpleBeanEditorDriver编辑器编辑的底层POJO？

I have a HashMap inside my POJO that I am using the Editor framework in GWT to edit. While I have access to the standard member variables bound through thier getters/setters, I don't know how to access the values inside the HashMap. How do I get access to the underlying POJO that is being edited through my editor that is using the SimpleBeanEditorDriver?

我的POJO：

@Entity(noClassnameStored=true)
public class ProfileConfig extends BaseEntity {
     @Indexed(unique=true)
     private String name;
     private boolean isDefault;
     private HashMap<ProfileID, ProfileInfo> profiles= new HashMap<ProfileID, ProfileInfo>();

     public ProfileInfo getProfile(ProfileID id) {
          return profiles.get(id);
     }

     public void setProfile(ProfileID id, ProfileInfo p) {
         profiles.put(id, p);
     }

我的编辑：

My Editor:

public class ProfileConfigEditor extends Composite implements ManagedObjectEditor<ProfileConfig> {

     private static ProfileConfigEditorUiBinder uiBinder = GWT.create(ProfileConfigEditorUiBinder.class);
     interface ProfileConfigEditorUiBinder extends UiBinder<Widget, ProfileConfigEditor> {
}

     private UserManager userManager;

     @UiField
     CellList Profiles;
     @UiField
     TextBox name;
     @UiField
     CheckBox isDefault;

假设我有一个userManager中有效的Profile ID列表，我该如何去调用在我的编辑器中从我的POJO获得getProfile方法？

So given that I have a list of valid Profile ids from the userManager, how do I go about calling the getProfile method from my POJO from within my Editor?

推荐答案

您需要的是 ValueAwareEditor 。



What you need is a ValueAwareEditor.

public class ProfileConfigEditor extends Composite implements ManagedObjectEditor<ProfileConfig>, ValueAwareEditor<ProfileConfig> {

void setValue(ProfileConfig value){
    // TODO: Call ProfileConfig.getProfile()
}

void flush(){
   // TODO: Call ProfileConfig.setProfile()
}


// ... Other methods here

或者，如果您想要更多挑战，可以查看自己的 CompositeEditor ，例如查看 ListEditor 的源代码。在你的情况下，你可以实现 CompositeEditor< ProfileConfig，ProfileInfo，MyNewProfileInfoEditor> 。你可以这样做为：这个编辑器会带一个 ProfileConfig 对象，提取一个或多个 ProfileInfo 对象并编辑它与一个或多个 MyNewProfileInfoEditor 编辑器

Alternatively, if you want more of a challenge, you can look at rolling your own CompositeEditor, for example see the source code for ListEditor. In your case, you would implement a CompositeEditor<ProfileConfig, ProfileInfo, MyNewProfileInfoEditor>. You can this of this as "This editor will take a ProfileConfig object, extract one or more ProfileInfo objects and edit it with one or more MyNewProfileInfoEditor editors"

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