Add backwards support for 1.11.2, bugfixes, update to 1.12

src/me/libraryaddict/disguise/utilities/backwards/BackwardsSupport.java

@@ -0,0 +1,56 @@
+package me.libraryaddict.disguise.utilities.backwards;
+
+import me.libraryaddict.disguise.disguisetypes.MetaIndex;
+import me.libraryaddict.disguise.utilities.ReflectionManager;
+import me.libraryaddict.disguise.utilities.backwards.metadata.Version_1_1;
+
+import java.lang.reflect.Field;
+
+/**
+ * Created by libraryaddict on 8/06/2017.
+ */
+public class BackwardsSupport {
+    public static BackwardMethods getMethods() {
+        try {
+            String version = ReflectionManager.getBukkitVersion();
+
+            if (version.equals("v1_11_R1")) {
+                return setupMetadata(Version_1_1.class);
+            }
+
+            return setupMetadata(BackwardMethods.class);
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        return null;
+    }
+
+    private static BackwardMethods setupMetadata(Class<? extends BackwardMethods> backwardsClass) {
+        try {
+            BackwardMethods backwards = backwardsClass.newInstance();
+
+            for (Field field : backwards.getClass().getFields()) {
+                if (field.getType() != MetaIndex.class)
+                    continue;
+
+                MetaIndex.setMetaIndex(field.getName(), (MetaIndex) field.get(backwards));
+            }
+
+            MetaIndex.setValues();
+
+            if (backwards.isOrderedIndexes()) {
+                MetaIndex.fillInBlankIndexes();
+                MetaIndex.orderMetaIndexes();
+            }
+
+            return backwards;
+        }
+        catch (Exception ex) {
+            ex.printStackTrace();
+        }
+
+        return null;
+    }
+}