Annotate Filter interface with @NotNull

[rhynodge.git] / src / main / java / net / pterodactylus / rhynodge / Filter.java

diff --git a/src/main/java/net/pterodactylus/rhynodge/Filter.java b/src/main/java/net/pterodactylus/rhynodge/Filter.java
index b175b48..1906afa 100644 (file)
--- a/src/main/java/net/pterodactylus/rhynodge/Filter.java
+++ b/src/main/java/net/pterodactylus/rhynodge/Filter.java
@@ -17,6 +17,8 @@
 
 package net.pterodactylus.rhynodge;
 
+import org.jetbrains.annotations.NotNull;
+
 /**
  * Defines a filter that runs between {@link Query}s and {@link Trigger}s and
  * can be used to convert a {@link State} into another {@link State}. This can
@@ -38,6 +40,7 @@ public interface Filter {
         *            The state to convert
         * @return The new state
         */
-       State filter(State state);
+       @NotNull
+       State filter(@NotNull State state);
 
 }