This section describes key classes which are essential while using Slice. They constitute a base for a day-to-day development.
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The com.cognifide.slice.api.provider.ModelProvider interface is a basic base interface of in Slice. It allows you to fetch an injectable object(s) mapped from specified resource or path. It's very similar to Guice com.google.inject.Injector because it is used for fetching objects of different classes. However it's more Sling-related because it always takes resource (or path) as a parameter, so that an object of the specified class can be mapped. You should use ModelProvider whenever there is a need for injecting a model mapped from a given resource (path).
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| Method | Description |
|---|---|
<T> T get(Class<T> type, String path); | Creates an object of class type and maps it from a resource from under specified path |
<T> T get(Class<T> type, Resource resource); | Creates an object of class type and maps it from the resource |
<T> T get(com.google.inject.Key<T> key, String path) throws ClassNotFoundException; | Creates an object identified by key type and maps it from the resource under specified path |
<T> T get(com.google.inject.Key<T> key, Resource resource); | Creates an object identified by key type and maps it from the resource under specified path |
<T> List<T> getChildModels(Class<T> type, String parentPath); | Creates a list of objects of class type and maps it from the resources under specified parent path |
<T> List<T> getChildModels(Class<T> type, Resource parentResource); | Creates a list of objects of class type and maps it from the resources under specified parent resource |
Object get(String className, String path) throws ClassNotFoundException; | Creates an object of a class defined by specified className String and maps it from a resource from under specified path |
Object get(String className, Resource resource) throws ClassNotFoundException; | Creates an object of a class defined by specified className String and maps it from the resource |
<T> List<T> getList(Class<T> type, Iterator<String> paths); | Creates a list of objects of class type and maps them accordingly from resources from under paths defined by paths iterator. |
<T> List<T> getList(Class<T> type, String[] paths); | Creates a list of objects of class type and maps them accordingly from resources from under paths defined by paths array. |
<T> List<T> getListFromResources(Class<T> type, Iterator<Resource> resources); | Creates a list of objects of class type and maps it from the resource corresponding resources returned by iterator |
ModelProvider can be injected to your models, so that you can read a model from an arbitrary resource or path, e.g.:
| Code Block |
|---|
import com.cognifide.app.util.Currency;
import com.cognifide.slice.api.provider.ModelProvider;
import com.cognifide.slice.mapper.annotation.JcrProperty;
import com.cognifide.slice.mapper.annotation.SliceResource;
import com.google.inject.Inject;
@SliceResource
public class OrderModel {
private final static String CONFIGURATION_PATH = "/content/app/configuration/jcr:content/currency";
private final ModelProvider modelProvider;
@JcrProperty
private int value;
@Inject
public OrderModel(ModelProvider modelProvider) {
this.modelProvider = modelProvider;
}
public int getValue() {
Currency currency = modelProvider.get(Currency.class, CONFIGURATION_PATH);
return formatToCurrency(value, currency);
}
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} |
Anchor Deprecated Deprecated
@Deprecated API
| Anchor | ||||
|---|---|---|---|---|
|
Few API members have been deprecated
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in Slice 4.0 and should be avoided where possible.
| Deprecated | Suggestion |
|---|---|
| Use one of
|
| Use Resource.listChildren() |
com.cognifide.slice.api.link.* | Whole package (link API) has been removed in Slice 4.0.0 Feel If your code is dependent on it, feel free to extract code from Slice 3.2.0 source code: https://github.com/Cognifide/Slice/tree/3.2.0 |
ClassToKeyMapper
The The com.cognifide.slice.api.provider.ClassToKeyMapper interface allows you to obtain a com.google.inject.Key associated with a class specified by a String value. Thanks to this you can inject objects of classes specified by Strings rather than classes. In general, this interface is not widely used. is no longer part of the Slice API - it has been moved to com.cognifide.slice.core.internal.provider.ClassToKeyMapper