Imported dice stuff from general utils into dedicated project

1 files changed, 75 insertions, 0 deletions

diff --git a/dice-lang/src/bjc/utils/dice/ScalarDiceExpression.java b/dice-lang/src/bjc/utils/dice/ScalarDiceExpression.java
new file mode 100644
index 0000000..4c3f244
--- /dev/null
+++ b/dice-lang/src/bjc/utils/dice/ScalarDiceExpression.java
@@ -0,0 +1,75 @@
+package bjc.utils.dice;
+
+/**
+ * A dice expression that combines a scalar and a dice
+ * 
+ * @author ben
+ *
+ */
+public class ScalarDiceExpression implements IDiceExpression {
+	/**
+	 * The operation to combine with
+	 */
+	private DiceExpressionType	det;
+
+	/**
+	 * The expression to be combined
+	 */
+	private IDiceExpression		exp;
+
+	/**
+	 * The scalar to be combined
+	 */
+	private int					scalar;
+
+	/**
+	 * Create a dice expression with a scalar
+	 * 
+	 * @param dex
+	 *            The dice to use
+	 * @param scalr
+	 *            The scalar to use
+	 * @param dt
+	 *            The operation to combine with
+	 */
+	public ScalarDiceExpression(IDiceExpression dex, int scalr,
+			DiceExpressionType dt) {
+		exp = dex;
+		scalar = scalr;
+		det = dt;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see bjc.utils.dice.IDiceExpression#roll()
+	 */
+	@Override
+	public int roll() {
+		switch (det) {
+			case ADD:
+				return exp.roll() + scalar;
+			case SUBTRACT:
+				return exp.roll() - scalar;
+			case MULTIPLY:
+				return exp.roll() * scalar;
+			case DIVIDE:
+				return Math.round(exp.roll() / scalar);
+			default:
+				throw new IllegalStateException(
+						"Got passed  a invalid ScalarExpressionType "
+								+ det);
+		}
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see java.lang.Object#toString()
+	 */
+	@Override
+	public String toString() {
+		return "scalar-exp[type=" + det + ", l=" + scalar + ", r="
+				+ exp.toString() + "]";
+	}
+}