added CounterState

.settings/edu.umd.cs.findbugs.core.prefs

 #FindBugs User Preferences
-#Wed Jan 28 07:11:46 CET 2015
+#Tue Mar 17 16:58:49 CET 2015
 detector_threshold=3
 effort=max
 excludefilter0=.fbExcludeFilterFile|true

src/main/java/teetime/util/CounterState.java

+package teetime.util;
+
+import java.util.Set;
+
+public class CounterState {
+
+	private final Set<CounterState> allCounters;
+
+	private int value;
+
+	public CounterState(final Set<CounterState> allCounters) {
+		super();
+		this.allCounters = allCounters;
+	}
+
+	// value operation (+)
+	public int inc(final int rightSummand) {
+		value += rightSummand;
+		return value;
+	}
+
+	public int getValue() {
+		return value;
+	}
+
+	// combine operation (+)
+	public int getThreadGlobalValue() {
+		int sum = 0;
+		for (CounterState counterState : allCounters) {
+			sum += counterState.getValue();
+		}
+		return sum;
+	}
+
+}