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ModelProvider (described in details at ModelProvider
) is a core interface in Slice and is used for providing objects (models). Its functionality is very similar to injector's getInstance(); however it is extended by a resource, so that object fields can be mapped using specified resource (or path). A simple use of ModelProvider:
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ModelProvider modelProvider = injector.getInstance(ModelProvider.class); TextModel model = modelProvider.get(TextModel.class, request.getResource()); |
ModelProvider is accessible through injector (line 1). The whole magic is done in line 2. modelProvider#get takes two parameters:
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The @SliceResource annotation is used for marking classes which should be mapped from current resource by built-in object-resource Mapper. An example class looks like this:
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@SliceResource
public class TextModel {
@JcrProperty
private String text;
public String getText() {
return text;
}
} |
Fields annotated by @JcrProperty will be mapped with corresponding properties from current resource. This way, once modelProvider#get method has been called (as in example above), the returned object is mapped and its text field stores a value of the current resource's text property.
Summary
The three subsections above described very briefly core mechanisms of Slice. To sum it up, take a look at the image below which put all these things together.
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