Changed Attriutes#aggregate() to return StatListGetter instead of StatList

Changed Attriutes#aggregate() to return StatListGetter instead of StatList
Unsure if this will change, but all calls require #first()
Attribute returns are all asserted to be StatLists of numLists = 1

core/src/com/riiablo/attributes/AggregateAttributes.java

@@ -16,8 +16,8 @@ public class AggregateAttributes extends Attributes {
   }
 
   @Override
-  public StatList aggregate() {
-    return agg;
+  public StatListGetter aggregate() {
+    return agg.first();
   }
 
   @Override

core/src/com/riiablo/attributes/Attributes.java

@@ -2,7 +2,6 @@ package com.riiablo.attributes;
 
 import android.support.annotation.CallSuper;
 import java.util.Iterator;
-import org.apache.commons.collections4.IteratorUtils;
 
 public abstract class Attributes implements Iterable<StatGetter> {
   /**
@@ -69,8 +68,8 @@ public abstract class Attributes implements Iterable<StatGetter> {
    * @see #remaining()
    * @see #list()
    */
-  public StatList aggregate() {
-    return list();
+  public StatListGetter aggregate() {
+    return list().first();
   }
 
   /**
@@ -130,9 +129,6 @@ public abstract class Attributes implements Iterable<StatGetter> {
    */
   @Override
   public Iterator<StatGetter> iterator() {
-    final StatList agg = aggregate();
-    final int numLists = agg.numLists();
-    if (numLists < 1) return IteratorUtils.emptyIterator();
-    return agg.statIterator(0);
+    return aggregate().statIterator();
   }
 }

core/src/com/riiablo/attributes/StatListGetter.java

@@ -32,6 +32,16 @@ public final class StatListGetter implements Iterable<StatGetter> {
     return stats.indexOf(list, stat);
   }
 
+  /** @see StatList#size(int) */
+  public int size() {
+    return stats.size(list);
+  }
+
+  /** @see StatList#isEmpty(int) */
+  public boolean isEmpty() {
+    return stats.isEmpty(list);
+  }
+
   /** @see StatList#contains(int, short) */
   public boolean contains(short stat) {
     return stats.contains(list, stat);