Fix BukkitTask#isCancelled() missing on 1.8

1 files changed, 32 insertions, 1 deletions

diff --git a/bukkit/src/main/java/com/leonardobishop/quests/bukkit/scheduler/bukkit/BukkitWrappedTask.java b/bukkit/src/main/java/com/leonardobishop/quests/bukkit/scheduler/bukkit/BukkitWrappedTask.java
index 9977c2f8..f620a559 100644
--- a/bukkit/src/main/java/com/leonardobishop/quests/bukkit/scheduler/bukkit/BukkitWrappedTask.java
+++ b/bukkit/src/main/java/com/leonardobishop/quests/bukkit/scheduler/bukkit/BukkitWrappedTask.java
@@ -1,14 +1,45 @@
 package com.leonardobishop.quests.bukkit.scheduler.bukkit;
 
 import com.leonardobishop.quests.bukkit.scheduler.WrappedTask;
+import org.bukkit.Bukkit;
 import org.bukkit.plugin.Plugin;
+import org.bukkit.scheduler.BukkitScheduler;
 import org.bukkit.scheduler.BukkitTask;
 import org.jetbrains.annotations.NotNull;
 
+import java.lang.reflect.Method;
 import java.util.Objects;
+import java.util.function.Predicate;
 
 public class BukkitWrappedTask implements WrappedTask {
 
+    // TODO: Replace this reflection shit with a more proper solution
+    private static final Predicate<BukkitTask> isCancelledPredicate;
+
+    static {
+        final Predicate<BukkitTask> predicate;
+
+        Method isCancelledMethod;
+        try {
+            isCancelledMethod = BukkitTask.class.getMethod("isCancelled");
+        } catch (final NoSuchMethodException e) {
+            isCancelledMethod = null; // doesn't exist on 1.8
+        }
+
+        if (isCancelledMethod != null) {
+            predicate = BukkitTask::isCancelled;
+        } else {
+            predicate = task -> {
+                final int taskId = task.getTaskId();
+                final BukkitScheduler scheduler = Bukkit.getScheduler();
+                return !(scheduler.isCurrentlyRunning(taskId) || scheduler.isQueued(taskId));
+            };
+        }
+
+        isCancelledPredicate = predicate;
+    }
+    // TODO: Replace this reflection shit with a more proper solution
+
     private final BukkitTask bukkitTask;
 
     public BukkitWrappedTask(@NotNull BukkitTask bukkitTask) {
@@ -22,7 +53,7 @@ public class BukkitWrappedTask implements WrappedTask {
 
     @Override
     public boolean isCancelled() {
-        return bukkitTask.isCancelled();
+        return isCancelledPredicate.test(bukkitTask);
     }
 
     @Override