Immutable Couple Class pls

src/com/massivecraft/mcore/Couple.java

@@ -0,0 +1,99 @@
+package com.massivecraft.mcore;
+
+import java.io.Serializable;
+import java.util.Map.Entry;
+
+import com.massivecraft.mcore.util.MUtil;
+
+public class Couple<A, B> implements Entry<A, B>, Cloneable, Serializable
+{
+	// -------------------------------------------- //
+	// CONSTANTS
+	// -------------------------------------------- //
+	
+	private static final transient long serialVersionUID = 1L;
+	
+	// -------------------------------------------- //
+	// FIELDS: RAW
+	// -------------------------------------------- //
+	
+	private final A first;
+	public A getFirst() { return this.first; };
+	
+	private final B second;
+	public B getSecond() { return this.second; };
+	
+	// -------------------------------------------- //
+	// FIELDS: WITH
+	// -------------------------------------------- //
+	
+	public Couple<A, B> withFirst(A first) { return valueOf(first, second); }
+	
+	public Couple<A, B> withSecond(B second) { return valueOf(first, second); }
+	
+	// -------------------------------------------- //
+	// PRIVATE CONSTRUCTOR
+	// -------------------------------------------- //
+	
+	private Couple(A first, B second)
+	{
+		this.first = first;
+		this.second = second;
+	}
+	
+	// -------------------------------------------- //
+	// OVERRIDE: ENTRY
+	// -------------------------------------------- //
+	
+	@Override
+	public A getKey()
+	{
+		return this.first;
+	}
+
+	@Override
+	public B getValue()
+	{
+		return this.second;
+	}
+
+	@Override
+	public B setValue(B arg0)
+	{
+		throw new IllegalStateException("This entry is a couple which is immutable.");
+	}
+	
+	// -------------------------------------------- //
+	// FACTORY: VALUE OF
+	// -------------------------------------------- //
+	
+	public static <A, B> Couple<A, B> valueOf(A first, B second)
+	{
+		return new Couple<A, B>(first, second);
+	}
+	
+	// -------------------------------------------- //
+	// EQUALS
+	// -------------------------------------------- //
+	
+	@Override
+	public boolean equals(Object derpObject)
+	{
+		if (derpObject == null) return false;
+		if (!(derpObject instanceof Couple<?, ?>)) return false;
+		Couple<?, ?> derp = (Couple<?, ?>)derpObject;
+		return MUtil.equals(this.getFirst(), derp.getFirst()) && MUtil.equals(this.getSecond(), derp.getSecond());
+	}
+	
+	// -------------------------------------------- //
+	// CLONE
+	// -------------------------------------------- //
+	
+	@Override
+	public Couple<A, B> clone()
+	{
+		return this;
+	}
+	
+	
+}