1 files changed, 77 insertions, 0 deletions
diff --git a/src/main/java/bjc/data/BooleanToggle.java b/src/main/java/bjc/data/BooleanToggle.java
new file mode 100644
index 0000000..209e97c
--- /dev/null
+++ b/src/main/java/bjc/data/BooleanToggle.java
@@ -0,0 +1,77 @@
+package bjc.data;
+
+/**
+ * A simple {@link ValueToggle} that swaps between true and false.
+ *
+ * @author EVE
+ *
+ */
+public class BooleanToggle implements Toggle<Boolean> {
+	/* The contained value. */
+	private boolean val;
+
+	/**
+	 * Create a new, initially false, flip-flop.
+	 */
+	public BooleanToggle() {
+		this(false);
+	}
+
+	/**
+	 * Create a flip-flop with the specified initial value.
+	 *
+	 * @param initial
+	 *        The initial value of the flip-flop.
+	 */
+	public BooleanToggle(final boolean initial) {
+		val = initial;
+	}
+
+	@Override
+	public Boolean get() {
+		final boolean res = val;
+
+		val = !res;
+
+		return res;
+	}
+
+	@Override
+	public Boolean peek() {
+		return val;
+	}
+
+	@Override
+	public void set(final boolean vl) {
+		val = vl;
+	}
+
+	@Override
+	public int hashCode() {
+		final int prime = 31;
+
+		int result = 1;
+
+		result = prime * result + (val ? 1231 : 1237);
+
+		return result;
+	}
+
+	@Override
+	public boolean equals(final Object obj) {
+		if(this == obj) return true;
+		if(obj == null) return false;
+		if(!(obj instanceof BooleanToggle)) return false;
+
+		final BooleanToggle other = (BooleanToggle) obj;
+
+		if(val != other.val) return false;
+
+		return true;
+	}
+
+	@Override
+	public String toString() {
+		return String.format("BooleanToggle [val=%s]", val);
+	}
+}