SlingDataFetcherSelector (Apache Sling GraphQL Core 0.0.4 API)

java.lang.Object
- org.apache.sling.graphql.core.engine.SlingDataFetcherSelector

```
public class SlingDataFetcherSelector
extends Object
```
Selects a SlingDataFetcher used to retrieve data, based on a name specified by a GraphQL schema directive.

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`RESERVED_NAME_PREFIX`	Fetchers which have a name starting with this prefix must be under the {#link RESERVED_PACKAGE_PREFIX} package.
`static String`	`RESERVED_PACKAGE_PREFIX`	Package name prefix for fetchers which have names starting with the {#link RESERVED_NAME_PREFIX}.

Constructor Summary

Constructors
Constructor Description

SlingDataFetcherSelector()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`activate(org.osgi.framework.BundleContext ctx)`
`@Nullable SlingDataFetcher<Object>`	`getSlingFetcher(@NotNull String name)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - RESERVED_NAME_PREFIX
```
public static final String RESERVED_NAME_PREFIX
```
    Fetchers which have a name starting with this prefix must be under the {#link RESERVED_PACKAGE_PREFIX} package.
    
    See Also:
    
    Constant Field Values
  - RESERVED_PACKAGE_PREFIX
```
public static final String RESERVED_PACKAGE_PREFIX
```
    Package name prefix for fetchers which have names starting with the {#link RESERVED_NAME_PREFIX}.
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - SlingDataFetcherSelector
```
public SlingDataFetcherSelector()
```
- Method Detail
  - activate
```
public void activate(org.osgi.framework.BundleContext ctx)
```
  - getSlingFetcher
```
@Nullable
public @Nullable SlingDataFetcher<Object> getSlingFetcher(@NotNull
                                                          @NotNull String name)
                                                   throws IOException
```
    Returns:
    
    a SlingDataFetcher, or null if none available. First tries to get an OSGi SlingDataFetcher service, and if not found tries to find a scripted SlingDataFetcher.
    
    Throws:
    
    IOException