Update favs

favs/src/main/java/com/thevoxelbox/voxelsniper/Brushes.java

@@ -0,0 +1,92 @@
+package com.thevoxelbox.voxelsniper;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.HashMultimap;
+import com.google.common.collect.ImmutableMultimap;
+import com.google.common.collect.Multimap;
+import com.thevoxelbox.voxelsniper.brush.IBrush;
+
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * Brush registration manager.
+ */
+public class Brushes
+{
+    private Multimap<Class<? extends IBrush>, String> brushes = HashMultimap.create();
+
+    /**
+     * Register a brush for VoxelSniper to be able to use.
+     *
+     * @param clazz        Brush implementing IBrush interface.
+     * @param handles      Handles under which the brush can be accessed ingame.
+     */
+    public void registerSniperBrush(Class<? extends IBrush> clazz, String... handles)
+    {
+        Preconditions.checkNotNull(clazz, "Cannot register null as a class.");
+        for (String handle : handles)
+        {
+            brushes.put(clazz, handle.toLowerCase());
+        }
+    }
+
+    /**
+     * Retrieve Brush class via handle Lookup.
+     *
+     * @param handle Case insensitive brush handle
+     * @return Brush class
+     */
+    public Class<? extends IBrush> getBrushForHandle(String handle)
+    {
+        Preconditions.checkNotNull(handle, "Brushhandle can not be null.");
+        if (!brushes.containsValue(handle.toLowerCase()))
+        {
+            return null;
+        }
+
+        for (Map.Entry<Class<? extends IBrush>, String> entry : brushes.entries())
+        {
+            if (entry.getValue().equalsIgnoreCase(handle))
+            {
+                return entry.getKey();
+            }
+        }
+        return null;
+    }
+
+    /**
+     * @return Amount of IBrush classes registered with the system under Sniper visibility.
+     */
+    public int registeredSniperBrushes()
+    {
+        return brushes.keySet().size();
+    }
+
+    /**
+     * @return Amount of handles registered with the system under Sniper visibility.
+     */
+    public int registeredSniperBrushHandles()
+    {
+        return brushes.size();
+    }
+
+    /**
+     *
+     * @param clazz Brush class
+     * @return All Sniper registered handles for the brush.
+     */
+    public Set<String> getSniperBrushHandles(Class<? extends IBrush> clazz)
+    {
+        return new HashSet<String>(brushes.get(clazz));
+    }
+
+    /**
+     * @return Immutable Multimap copy of all the registered brushes
+     */
+    public Multimap<Class<?extends IBrush>, String> getRegisteredBrushesMultimap()
+    {
+        return ImmutableMultimap.copyOf(brushes);
+    }
+}