# ObserverSpec

Artifact: [androidx.appsearch:appsearch](https://developer.android.com/jetpack/androidx/releases/appsearch) [View Source](https://cs.android.com/search?q=file:androidx/appsearch/observer/ObserverSpec.java+class:androidx.appsearch.observer.ObserverSpec) Added in [1.1.0](https://developer.android.com/jetpack/androidx/releases/appsearch#1.1.0)

*** ** * ** ***


```
public final class ObserverSpec
```

<br />

*** ** * ** ***

Configures the types, namespaces and other properties that `https://developer.android.com/reference/androidx/appsearch/observer/ObserverCallback` instances match against.

## Summary

| ### Nested types |
|---|
| `public final class https://developer.android.com/reference/androidx/appsearch/observer/ObserverSpec.Builder` Builder for `https://developer.android.com/reference/androidx/appsearch/observer/ObserverSpec` instances. |

| ### Public methods |
|---|---|
| `@https://developer.android.com/reference/androidx/annotation/NonNull https://developer.android.com/reference/java/util/Set.html<https://developer.android.com/reference/java/lang/String.html>` | `https://developer.android.com/reference/androidx/appsearch/observer/ObserverSpec#getFilterSchemas()()` Returns the list of schema types which observers using this spec will trigger on. |

## Public methods

### getFilterSchemas

Added in [1.1.0](https://developer.android.com/jetpack/androidx/releases/appsearch#1.1.0)

```
public @NonNull Set<String> getFilterSchemas()
```

Returns the list of schema types which observers using this spec will trigger on.

If empty, the observers will trigger on all schema types.