Update dependenty code

src/external/java/com/minelittlepony/model/anim/BasicEasingInterpolator.java

@@ -2,9 +2,30 @@ package com.minelittlepony.model.anim;
 
 import java.util.HashMap;
 import java.util.Map;
+import java.util.UUID;
+
+import com.minelittlepony.util.chron.ChronicCache;
+import com.minelittlepony.util.chron.Touchable;
 
 //#MineLittlePony#
-public class BasicEasingInterpolator implements IInterpolator {
+public class BasicEasingInterpolator extends Touchable<BasicEasingInterpolator> implements IInterpolator {
+
+    private static ChronicCache<UUID, BasicEasingInterpolator> instanceCache = new ChronicCache<>();
+
+    /**
+     * Gets or creates a new basic, linear interpolator for the provided id.
+     */
+    public static IInterpolator getInstance(UUID id) {
+        return instanceCache.retrieve(id, BasicEasingInterpolator::new);
+    }
+
+    public BasicEasingInterpolator() {
+
+    }
+
+    private BasicEasingInterpolator(UUID id) {
+
+    }
 
     private final Map<String, Float> properties = new HashMap<String, Float>();
 

src/external/java/com/minelittlepony/util/chron/ChronicCache.java

@@ -0,0 +1,18 @@
+package com.minelittlepony.util.chron;
+
+import java.util.HashMap;
+import java.util.function.Function;
+
+//#MineLittlePony#
+public class ChronicCache<K, V extends Touchable<V>> extends HashMap<K, V> {
+    private static final long serialVersionUID = 6454924015818181978L;
+
+    public V retrieve(K key, Function<? super K, ? extends V> mappingFunction) {
+        V result = computeIfAbsent(key, mappingFunction).touch();
+
+        entrySet().removeIf(entry -> entry.getValue().hasExpired());
+
+        return result;
+    }
+
+}

src/external/java/com/minelittlepony/util/chron/Touchable.java

@@ -0,0 +1,17 @@
+package com.minelittlepony.util.chron;
+
+//#MineLittlePony#
+public abstract class Touchable<T extends Touchable<T>> {
+
+    private long expirationPeriod;
+
+    public boolean hasExpired() {
+        return expirationPeriod <= System.currentTimeMillis();
+    }
+
+    @SuppressWarnings("unchecked")
+    public T touch() {
+        expirationPeriod = System.currentTimeMillis() + 30000;
+        return (T)this;
+    }
+}