MetadataService (Opencast :: metadata-api 14.8 API)

Type Parameters:

A - the type of metadata provided

All Known Subinterfaces:

MediaPackageMetadataService, StaticMetadataService
```
public interface MetadataService<A>
```
Generic interface for metadata providing services.

Field Summary

Fields
Modifier and Type Field Description

static String PRIORITY_KEY
The static constant used when configuring the priority

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`A`	`getMetadata(org.opencastproject.mediapackage.MediaPackage mediaPackage)`	Gets the metadata for a `MediaPackage` if possible.
`int`	`getPriority()`	The priority of this MetadataService compared to others when more than one is registered in the system.

- Field Detail
  - PRIORITY_KEY
```
static final String PRIORITY_KEY
```
    The static constant used when configuring the priority
    
    See Also:
    
    Constant Field Values
- Method Detail
  - getPriority
```
int getPriority()
```
    The priority of this MetadataService compared to others when more than one is registered in the system. When more than one MetadataService is registered, the getMetadata(MediaPackage) method may be called on each service in order of priority. Metadata objects returned by higher priority MetadataServices should override those returned by lower priority services. The lowest number is the highest priority (i.e. 1 is a higher priority than 2).
    
    Returns:
    
    The priority
  - getMetadata
```
A getMetadata(org.opencastproject.mediapackage.MediaPackage mediaPackage)
```
    Gets the metadata for a MediaPackage if possible. If no metadata can be extracted from the catalogs in the MediaPackage, this returns null;
    
    Parameters:
    
    mediaPackage - The mediapackage to inspect for catalogs
    
    Returns:
    
    The metadata extracted from the media package