insertion of many values into the persistent map

pdb-utils/src/main/java/org/lucares/utils/Preconditions.java

@@ -24,12 +24,23 @@ public class Preconditions {
 		}
 	}
 
-	public static void checkEqual(final Object actual, final Object expected) {
-		if (!Objects.equals(actual, expected)) {
-			throw new IllegalStateException();
+	/**
+	 *
+	 * @param a
+	 * @param b
+	 * @param message formatted with {@link MessageFormat}
+	 * @param args
+	 */
+	public static void checkGreaterOrEqual(final long a, final long b, final String message, final Object... args) {
+		if (a < b) {
+			throw new IllegalStateException(MessageFormat.format(message, args) + " Expected: " + a + " >= " + b);
 		}
 	}
 
+	public static void checkEqual(final Object actual, final Object expected) {
+		checkEqual(actual, expected, "expected {0} is equal to {1}", actual, expected);
+	}
+
 	/**
 	 * Check that the given values are equal. The check is done with
 	 * {@link Objects#equals(Object, Object)}
@@ -46,4 +57,5 @@ public class Preconditions {
 					MessageFormat.format(message, args) + " Expected: " + actual + " equals " + expected);
 		}
 	}
+
 }