Some work on milestones is done

src/main/java/com/gmail/nossr50/util/skills/SkillMilestoneFactory.java

@@ -0,0 +1,55 @@
+package com.gmail.nossr50.util.skills;
+
+import com.gmail.nossr50.config.AdvancedConfig;
+import com.gmail.nossr50.datatypes.skills.SkillMilestone;
+import com.gmail.nossr50.datatypes.skills.SubSkill;
+
+import java.util.HashMap;
+
+/**
+ * This Factory class builds SkillMilestone chains as needed
+ * SkillMilestones are stored in a hash map
+ */
+public class SkillMilestoneFactory {
+
+    private static HashMap<SubSkill, SkillMilestone> skillMilestoneMap;
+
+    /**
+     * Gets a the SkillMilestone chain for this subskill
+     * Builds that chain if it doesn't exist before returning the parent node
+     * @param subSkill The SubSkill to get the SkillMilestone chain for
+     * @return The parent node of the SkillMilestone chain for the target subskill
+     */
+    public static SkillMilestone getSkillMilestone(SubSkill subSkill)
+    {
+        //Init the map
+        if(skillMilestoneMap == null)
+            skillMilestoneMap = new HashMap<>();
+
+        if(skillMilestoneMap.get(subSkill) == null)
+            return buildSkillMilestone(subSkill);
+        else
+            return skillMilestoneMap.get(subSkill);
+    }
+
+    /**
+     * Constructs a SkillMilestone chain for a given subskill
+     * @param subSkill The subskill to build the SkillMilestone chain for
+     * @return The base node of the SkillMilestone chain
+     */
+    private static SkillMilestone buildSkillMilestone(SubSkill subSkill)
+    {
+        //Init our parent node
+        SkillMilestone newSkillMilestone = new SkillMilestone(subSkill, AdvancedConfig.getInstance().getSubSkillUnlockLevel(subSkill, 1));
+
+        //There's probably a better way to do this
+        for(int x = 0; x < subSkill.getNumRanks()-1; x++)
+        {
+            newSkillMilestone.addChildMilestone();
+        }
+
+        //DEBUG
+        System.out.println("Milestone constructed for "+subSkill);
+        return skillMilestoneMap.put(subSkill, newSkillMilestone);
+    }
+}