Enhance trigger interface to allow merging states.

[rhynodge.git] / src / main / java / net / pterodactylus / rhynodge / triggers / FileExistenceTrigger.java

diff --git a/src/main/java/net/pterodactylus/rhynodge/triggers/FileExistenceTrigger.java b/src/main/java/net/pterodactylus/rhynodge/triggers/FileExistenceTrigger.java
index 49d91b2..264740f 100644 (file)
--- a/src/main/java/net/pterodactylus/rhynodge/triggers/FileExistenceTrigger.java
+++ b/src/main/java/net/pterodactylus/rhynodge/triggers/FileExistenceTrigger.java
@@ -33,6 +33,9 @@ import com.google.common.base.Preconditions;
  */
 public class FileExistenceTrigger implements Trigger {
 
+       /** Whether a change is triggered. */
+       private boolean triggered;
+
        //
        // TRIGGER METHODS
        //
@@ -41,10 +44,19 @@ public class FileExistenceTrigger implements Trigger {
         * {@inheritDoc}
         */
        @Override
-       public boolean triggers(State previousState, State currentState) {
+       public State mergeStates(State previousState, State currentState) {
                Preconditions.checkState(previousState instanceof FileState, "previousState is not a FileState");
                Preconditions.checkState(currentState instanceof FileState, "currentState is not a FileState");
-               return ((FileState) previousState).exists() != ((FileState) currentState).exists();
+               triggered = ((FileState) previousState).exists() != ((FileState) currentState).exists();
+               return currentState;
+       }
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public boolean triggers() {
+               return triggered;
        }
 
        /**