From c85db1bef75e5c9b7287ab7fdb6e1380d577c674 Mon Sep 17 00:00:00 2001
From: Ben Culkin <scorpress@gmail.com>
Date: Sun, 22 Nov 2020 15:15:11 -0500
Subject: Add a 'context' type

This was some example code I found somewhere that seemed interesting.
---
 src/main/java/bjc/data/IContext.java | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 src/main/java/bjc/data/IContext.java

(limited to 'src/main/java/bjc/data/IContext.java')

diff --git a/src/main/java/bjc/data/IContext.java b/src/main/java/bjc/data/IContext.java
new file mode 100644
index 0000000..a1073f1
--- /dev/null
+++ b/src/main/java/bjc/data/IContext.java
@@ -0,0 +1,18 @@
+package bjc.data;
+
+public interface IContext {
+	void register(String name, Object o);
+
+	IContext getParent();
+
+	Object get(String name);
+	
+	<T> T get(Class<T> contract);
+	
+	default <T> T get(String name, Class<T> contract) {
+		Object obj = get(name);
+		return obj == null 
+				? getParent().get(name, contract) 
+						: contract.cast(obj);
+	};
+}
-- 
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