From 1bff7e49ed64d74e36d901e84c594cf63b58350b Mon Sep 17 00:00:00 2001
From: bculkin2442 <bjculkin@mix.wvu.edu>
Date: Fri, 18 Mar 2016 19:47:49 -0400
Subject: General changes to the dice package

The biggest change is the addition of variables and assignment
---
 .../bjc/utils/dice/ReferenceDiceExpression.java    | 60 ++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 BJC-Utils2/src/main/java/bjc/utils/dice/ReferenceDiceExpression.java

(limited to 'BJC-Utils2/src/main/java/bjc/utils/dice/ReferenceDiceExpression.java')

diff --git a/BJC-Utils2/src/main/java/bjc/utils/dice/ReferenceDiceExpression.java b/BJC-Utils2/src/main/java/bjc/utils/dice/ReferenceDiceExpression.java
new file mode 100644
index 0000000..d8062da
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/dice/ReferenceDiceExpression.java
@@ -0,0 +1,60 @@
+package bjc.utils.dice;
+
+import java.util.Map;
+
+/**
+ * A dice expression that refers to a variable bound in a mutable
+ * enviroment
+ * 
+ * @author ben
+ *
+ */
+public class ReferenceDiceExpression implements IDiceExpression {
+	/**
+	 * The name of the bound variable
+	 */
+	private String							name;
+
+	/**
+	 * The enviroment to do variable dereferencing against
+	 */
+	private Map<String, IDiceExpression>	env;
+
+	/**
+	 * Create a new reference dice expression referring to the given name
+	 * in an enviroment
+	 * 
+	 * @param name
+	 *            The name of the bound variable
+	 * @param env
+	 *            The enviroment to resolve the variable against
+	 */
+	public ReferenceDiceExpression(String name,
+			Map<String, IDiceExpression> env) {
+		this.name = name;
+		this.env = env;
+	}
+
+	@Override
+	public int roll() {
+		return env.get(name).roll();
+	}
+
+	@Override
+	public String toString() {
+		if (env.containsKey(name)) {
+			return env.get(name).toString();
+		} else {
+			return name;
+		}
+	}
+
+	/**
+	 * Get the name of the referenced variable
+	 * 
+	 * @return the name of the referenced variable
+	 */
+	public String getName() {
+		return name;
+	}
+}
-- 
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