initial commit

java/src/game/tileentity/LockCode.java

@@ -0,0 +1,42 @@
+package game.tileentity;
+
+import game.nbt.NBTTagCompound;
+
+public class LockCode
+{
+    public static final LockCode EMPTY_CODE = new LockCode("");
+    private final String lock;
+
+    public LockCode(String code)
+    {
+        this.lock = code;
+    }
+
+    public boolean isEmpty()
+    {
+        return this.lock == null || this.lock.isEmpty();
+    }
+
+    public String getLock()
+    {
+        return this.lock;
+    }
+
+    public void toNBT(NBTTagCompound nbt)
+    {
+        nbt.setString("Lock", this.lock);
+    }
+
+    public static LockCode fromNBT(NBTTagCompound nbt)
+    {
+        if (nbt.hasKey("Lock", 8))
+        {
+            String s = nbt.getString("Lock");
+            return new LockCode(s);
+        }
+        else
+        {
+            return EMPTY_CODE;
+        }
+    }
+}