Add entity.marker tag and mechanism, fixes #1311

src/main/java/net/aufdemrand/denizen/Denizen.java

@@ -778,6 +778,7 @@ public void onEnable() {
             propertyParser.registerProperty(EntityItem.class, dEntity.class);
             propertyParser.registerProperty(EntityJumpStrength.class, dEntity.class);
             propertyParser.registerProperty(EntityKnockback.class, dEntity.class);
+            propertyParser.registerProperty(EntityMarker.class, dEntity.class);
             propertyParser.registerProperty(EntityPainting.class, dEntity.class);
             propertyParser.registerProperty(EntityPotion.class, dEntity.class);
             propertyParser.registerProperty(EntityPowered.class, dEntity.class);

src/main/java/net/aufdemrand/denizen/objects/properties/entity/EntityMarker.java

@@ -0,0 +1,101 @@
+package net.aufdemrand.denizen.objects.properties.entity;
+
+import net.aufdemrand.denizen.objects.dEntity;
+import net.aufdemrand.denizencore.objects.Element;
+import net.aufdemrand.denizencore.objects.Mechanism;
+import net.aufdemrand.denizencore.objects.dObject;
+import net.aufdemrand.denizencore.objects.properties.Property;
+import net.aufdemrand.denizencore.tags.Attribute;
+import org.bukkit.entity.ArmorStand;
+import org.bukkit.entity.EntityType;
+
+public class EntityMarker implements Property {
+
+    public static boolean describes(dObject entity) {
+        return entity instanceof dEntity && ((dEntity) entity).getBukkitEntityType() == EntityType.ARMOR_STAND;
+    }
+
+    public static EntityMarker getFrom(dObject entity) {
+        if (!describes(entity)) {
+            return null;
+        }
+
+        else {
+            return new EntityMarker((dEntity) entity);
+        }
+    }
+
+    ///////////////////
+    // Instance Fields and Methods
+    /////////////
+
+    private EntityMarker(dEntity entity) {
+        dentity = entity;
+    }
+
+    dEntity dentity;
+
+    /////////
+    // Property Methods
+    ///////
+
+    @Override
+    public String getPropertyString() {
+        if (!((ArmorStand) dentity.getBukkitEntity()).isMarker()) {
+            return null;
+        }
+        else {
+            return "true";
+        }
+    }
+
+    @Override
+    public String getPropertyId() {
+        return "marker";
+    }
+
+    ///////////
+    // dObject Attributes
+    ////////
+
+    @Override
+    public String getAttribute(Attribute attribute) {
+
+        if (attribute == null) {
+            return "null";
+        }
+
+        // <--[tag]
+        // @attribute <e@entity.marker>
+        // @returns Element(Boolean)
+        // @mechanism dEntity.marker
+        // @group properties
+        // @description
+        // If the entity is an armor stand, returns whether the armor stand is a marker.
+        // -->
+        if (attribute.startsWith("marker")) {
+            return new Element(((ArmorStand) dentity.getBukkitEntity()).isMarker())
+                    .getAttribute(attribute.fulfill(1));
+        }
+
+        return null;
+    }
+
+    @Override
+    public void adjust(Mechanism mechanism) {
+
+        // <--[mechanism]
+        // @object dEntity
+        // @name marker
+        // @input Element(Boolean)
+        // @description
+        // Changes the marker state of an armor stand.
+        // @tags
+        // <e@entity.marker>
+        // -->
+
+        if (mechanism.matches("marker") && mechanism.requireBoolean()) {
+            ((ArmorStand) dentity.getBukkitEntity()).setMarker(mechanism.getValue().asBoolean());
+        }
+    }
+}