PaperMC/nms-patches/EntityOcelot.patch

--- a/net/minecraft/server/EntityOcelot.java
+++ b/net/minecraft/server/EntityOcelot.java
@@ -57,7 +57,7 @@
     }
 
     protected boolean isTypeNotPersistent() {
-        return !this.isTamed() && this.ticksLived > 2400;
+        return !this.isTamed() /*&& this.ticksLived > 2400*/; // CraftBukkit
     }
 
     protected void initAttributes() {
@@ -103,6 +103,9 @@
         return entity.damageEntity(DamageSource.mobAttack(this), 3.0F);
     }
 
+    /* CraftBukkit start
+    // Function disabled as it has no special function anymore after
+    //   setSitting is disabled.
     public boolean damageEntity(DamageSource damagesource, float f) {
         if (this.isInvulnerable(damagesource)) {
             return false;
@@ -114,6 +117,7 @@
             return super.damageEntity(damagesource, f);
         }
     }
+    // CraftBukkit end */
 
     @Nullable
     protected MinecraftKey J() {
@@ -133,7 +137,8 @@
             }
 
             if (!this.world.isClientSide) {
-                if (this.random.nextInt(3) == 0) {
+                // CraftBukkit - added event call and isCancelled check
+                if (this.random.nextInt(3) == 0 && !org.bukkit.craftbukkit.event.CraftEventFactory.callEntityTameEvent(this, entityhuman).isCancelled()) {
                     this.c(entityhuman);
                     this.setCatType(1 + this.world.random.nextInt(3));
                     this.p(true);
@@ -237,7 +242,7 @@
 
                 entityocelot.setPositionRotation(this.locX, this.locY, this.locZ, this.yaw, 0.0F);
                 entityocelot.setAgeRaw(-24000);
-                this.world.addEntity(entityocelot);
+                this.world.addEntity(entityocelot, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.OCELOT_BABY); // CraftBukkit - add SpawnReason
             }
         }