Ignore chains and states default directories.

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

diff --git a/src/main/java/net/pterodactylus/reactor/triggers/FileExistenceTrigger.java b/src/main/java/net/pterodactylus/reactor/triggers/FileExistenceTrigger.java
index 2be86ea..a285843 100644 (file)
--- a/src/main/java/net/pterodactylus/reactor/triggers/FileExistenceTrigger.java
+++ b/src/main/java/net/pterodactylus/reactor/triggers/FileExistenceTrigger.java
@@ -17,15 +17,21 @@
 
 package net.pterodactylus.reactor.triggers;
 
+import net.pterodactylus.reactor.Reaction;
+import net.pterodactylus.reactor.State;
 import net.pterodactylus.reactor.Trigger;
+import net.pterodactylus.reactor.output.DefaultOutput;
+import net.pterodactylus.reactor.output.Output;
 import net.pterodactylus.reactor.states.FileState;
 
+import com.google.common.base.Preconditions;
+
 /**
  * A trigger that detects changes in the existence of a file.
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
-public class FileExistenceTrigger implements Trigger<FileState> {
+public class FileExistenceTrigger implements Trigger {
 
        //
        // TRIGGER METHODS
@@ -35,8 +41,18 @@ public class FileExistenceTrigger implements Trigger<FileState> {
         * {@inheritDoc}
         */
        @Override
-       public boolean triggers(FileState previousState, FileState currentState) {
-               return previousState.exists() != currentState.exists();
+       public boolean triggers(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();
+       }
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public Output output(Reaction reaction) {
+               return new DefaultOutput("File appeared/disappeared").addText("text/plain", "File appeared/disappeared").addText("text/html", "<div>File appeared/disappeared</div>");
        }
 
 }