RankedSchemaProviders (Apache Sling GraphQL Core 0.0.6 API)

java.lang.Object
- org.apache.sling.graphql.core.schema.RankedSchemaProviders

All Implemented Interfaces:

SchemaProvider
```
public class RankedSchemaProviders
extends Object
implements SchemaProvider
```
Uses multiple registered SchemaProvider services to get a schema, using the first one that returns non-null.

Constructor Summary

Constructors
Constructor Description

RankedSchemaProviders()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`bindSchemaProvider(SchemaProvider service, Map<String,Object> props)`
`@Nullable String`	`getSchema(@NotNull org.apache.sling.api.resource.Resource r, @Nullable String[] selectors)`	Get a GraphQL Schema definition for the given resource and optional selectors
`protected void`	`unbindSchemaProvider(SchemaProvider service, Map<String,Object> props)`

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

- Constructor Detail
  - RankedSchemaProviders
```
public RankedSchemaProviders()
```
- Method Detail
  - getSchema
```
@Nullable
public @Nullable String getSchema(@NotNull
                                  @NotNull org.apache.sling.api.resource.Resource r,
                                  @Nullable
                                  @Nullable String[] selectors)
                           throws IOException
```
    Description copied from interface: SchemaProvider
    
    Get a GraphQL Schema definition for the given resource and optional selectors
    
    Specified by:
    
    getSchema in interface SchemaProvider
    
    Parameters:
    
    r - The Resource to which the schema applies
    
    selectors - Optional set of Request Selectors that can influence the schema selection
    
    Returns:
    
    a GraphQL schema that can be annotated to define the data fetchers to use, see this module's documentation. Can return null if a schema cannot be provided, in which case a different provider should be used.
    
    Throws:
    
    IOException - if the schema cannot be retrieved
  - bindSchemaProvider
```
protected void bindSchemaProvider(SchemaProvider service,
                                  Map<String,Object> props)
```
  - unbindSchemaProvider
```
protected void unbindSchemaProvider(SchemaProvider service,
                                    Map<String,Object> props)
```