From c82e3b3b2de0633317ec8fc85925e91422820597 Mon Sep 17 00:00:00 2001
From: "Benjamin J. Culkin" <bjculkin@mix.wvu.edu>
Date: Sun, 8 Oct 2017 22:39:59 -0300
Subject: Start splitting into maven modules

---
 .../main/java/bjc/utils/funcutils/EnumUtils.java   | 63 ++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 base/src/main/java/bjc/utils/funcutils/EnumUtils.java

(limited to 'base/src/main/java/bjc/utils/funcutils/EnumUtils.java')

diff --git a/base/src/main/java/bjc/utils/funcutils/EnumUtils.java b/base/src/main/java/bjc/utils/funcutils/EnumUtils.java
new file mode 100644
index 0000000..e4c0bda
--- /dev/null
+++ b/base/src/main/java/bjc/utils/funcutils/EnumUtils.java
@@ -0,0 +1,63 @@
+package bjc.utils.funcutils;
+
+import java.util.Random;
+import java.util.function.Consumer;
+
+import bjc.utils.funcdata.FunctionalList;
+import bjc.utils.funcdata.IList;
+
+/**
+ * Utility methods on enums
+ *
+ * @author ben
+ *
+ */
+public class EnumUtils {
+	/**
+	 * Do an action for a random number of enum values
+	 *
+	 * @param <E>
+	 *                The type of the enum
+	 * @param clasz
+	 *                The enum class
+	 * @param nValues
+	 *                The number of values to execute the action on
+	 * @param action
+	 *                The action to perform on random values
+	 * @param rnd
+	 *                The source of randomness to use
+	 */
+	public static <E extends Enum<E>> void doForValues(final Class<E> clasz, final int nValues,
+			final Consumer<E> action, final Random rnd) {
+		final E[] enumValues = clasz.getEnumConstants();
+
+		final IList<E> valueList = new FunctionalList<>(enumValues);
+
+		final int randomValueCount = enumValues.length - nValues;
+
+		for (int i = 0; i <= randomValueCount; i++) {
+			final E rDir = valueList.randItem(rnd::nextInt);
+
+			valueList.removeMatching(rDir);
+		}
+
+		valueList.forEach(action);
+	}
+
+	/**
+	 * Get a random value from an enum
+	 *
+	 * @param <E>
+	 *                The type of the enum
+	 * @param clasz
+	 *                The class of the enum
+	 * @param rnd
+	 *                The random source to use
+	 * @return A random value from the specified enum
+	 */
+	public static <E extends Enum<E>> E getRandomValue(final Class<E> clasz, final Random rnd) {
+		final E[] enumValues = clasz.getEnumConstants();
+
+		return new FunctionalList<>(enumValues).randItem(rnd::nextInt);
+	}
+}
-- 
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