org.mule.runtime.extension.api.annotation.metadata

Annotation Type MetadataKeyId

@Target(value={PARAMETER,FIELD})
 @Retention(value=RUNTIME)
 @Documented
public @interface MetadataKeyId

Marks one of the parameters of an Operation or Source as the key for the metadata lookup. This lookup is resolved by the TypeKeysResolver referenced in the MetadataScope, at Operation, Source or Extension level, which will return the list of available the MetadataKey or also, the lookup can be resolved by the QueryEntityResolver.getEntityKeys(MetadataContext) for Query annotated operations, this time the key will represent the query (DSQL or Native) which is used to calculate the output metadata.

Annotation Usage:

• Operations: The annotation must be applied to an Operation parameter to mark it as the metadata key parameter. The usage of this annotation in multiple parameters of the same operation or fields of the operation class is not allowed.
• Sources: The annotation must be applied to a Source field annotated with Parameter to mark it as the metadata key parameter. The usage of this annotation in a non Parameter field, multiple fields or in a method parameter, is not allowed.

The illegal usage of this annotation could produce extension compilation errors

Since:

1.0

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
Class<? extends org.mule.runtime.api.metadata.resolving.TypeKeysResolver>	value

Element Detail

value

public abstract Class<? extends org.mule.runtime.api.metadata.resolving.TypeKeysResolver> value

Returns:

the associated TypeKeysResolver for the annotated Component

Default:

org.mule.runtime.extension.api.metadata.NullMetadataResolver.class