✨ Allow triggering states from anywhere

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

diff --git a/src/main/java/net/pterodactylus/rhynodge/State.java b/src/main/java/net/pterodactylus/rhynodge/State.java
index d549d69..966dbe3 100644 (file)
--- a/src/main/java/net/pterodactylus/rhynodge/State.java
+++ b/src/main/java/net/pterodactylus/rhynodge/State.java
@@ -17,6 +17,10 @@
 
 package net.pterodactylus.rhynodge;
 
+import javax.annotation.Nonnull;
+
+import net.pterodactylus.rhynodge.output.Output;
+
 /**
  * Defines the current state of a system.
  *
@@ -43,6 +47,21 @@ public interface State {
         */
        boolean success();
 
+       /**
+        * Returns whether this state triggers a change notification. This can
+        * only return {@code true} if this state is the result of a
+        * {@link Merger} merging two states.
+        *
+        * @return {@code true} if this state triggers a change notification,
+        * {@code false} otherwise
+        */
+       boolean triggered();
+
+       /**
+        * Sets whether this state will trigger a notification.
+        */
+       void trigger();
+
        boolean isEmpty();
 
        /**
@@ -76,4 +95,7 @@ public interface State {
         */
        Throwable exception();
 
+       @Nonnull
+       Output output(Reaction reaction);
+
 }