Improve entity hierarchy by adding Mob interface.

By: md_5 <git@md-5.net>

paper-api/src/main/java/org/bukkit/entity/Ambient.java

@@ -3,4 +3,4 @@ package org.bukkit.entity;
 /**
  * Represents an ambient mob
  */
-public interface Ambient extends LivingEntity {}
+public interface Ambient extends Mob {}

paper-api/src/main/java/org/bukkit/entity/Creature.java

@@ -4,23 +4,4 @@ package org.bukkit.entity;
  * Represents a Creature. Creatures are non-intelligent monsters or animals
  * which have very simple abilities.
  */
-public interface Creature extends LivingEntity {
+public interface Creature extends Mob {}
-
-    /**
-     * Instructs this Creature to set the specified LivingEntity as its
-     * target.
-     * <p>
-     * Hostile creatures may attack their target, and friendly creatures may
-     * follow their target.
-     *
-     * @param target New LivingEntity to target, or null to clear the target
-     */
-    public void setTarget(LivingEntity target);
-
-    /**
-     * Gets the current target of this Creature
-     *
-     * @return Current target of this creature, or null if none exists
-     */
-    public LivingEntity getTarget();
-}

paper-api/src/main/java/org/bukkit/entity/Flying.java

@@ -3,4 +3,4 @@ package org.bukkit.entity;
 /**
  * Represents a Flying Entity.
  */
-public interface Flying extends LivingEntity {}
+public interface Flying extends Mob {}

paper-api/src/main/java/org/bukkit/entity/Mob.java

@@ -0,0 +1,24 @@
+package org.bukkit.entity;
+
+/**
+ * Represents a Mob. Mobs are living entities with simple AI.
+ */
+public interface Mob extends LivingEntity {
+
+    /**
+     * Instructs this Mob to set the specified LivingEntity as its target.
+     * <p>
+     * Hostile creatures may attack their target, and friendly creatures may
+     * follow their target.
+     *
+     * @param target New LivingEntity to target, or null to clear the target
+     */
+    public void setTarget(LivingEntity target);
+
+    /**
+     * Gets the current target of this Mob
+     *
+     * @return Current target of this creature, or null if none exists
+     */
+    public LivingEntity getTarget();
+}

paper-api/src/main/java/org/bukkit/entity/Slime.java

@@ -3,7 +3,7 @@ package org.bukkit.entity;
 /**
  * Represents a Slime.
  */
-public interface Slime extends LivingEntity {
+public interface Slime extends Mob {
 
     /**
      * @return The size of the slime
@@ -14,19 +14,4 @@ public interface Slime extends LivingEntity {
      * @param sz The new size of the slime.
      */
     public void setSize(int sz);
-
-    /**
-     * Set the {@link LivingEntity} target for this slime. Set to null to clear
-     * the target.
-     *
-     * @param target the entity to target
-     */
-    public void setTarget(LivingEntity target);
-
-    /**
-     * Get the {@link LivingEntity} this slime is currently targeting.
-     *
-     * @return the current target, or null if no target exists.
-     */
-    public LivingEntity getTarget();
 }