rename firstNotNull to defaultIfNull

src/main/java/com/imyeyu/java/TimiJava.java

@@ -3,7 +3,9 @@ package com.imyeyu.java;
 import java.io.PrintWriter;
 import java.io.StringWriter;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.Map;
+import java.util.Objects;
 
 /**
  *
@@ -68,24 +70,15 @@ public interface TimiJava {
 		return !isEmpty(object);
 	}
 
-	@SafeVarargs
-	static <T> T firstNotNull(T... objects) {
-		for (int i = 0; i < objects.length; i++) {
-			if (objects[i] != null) {
-				return objects[i];
-			}
-		}
-		return null;
+	static <T> T defaultIfNull(T obj, T defaultObj) {
+		return Objects.requireNonNullElse(obj, defaultObj);
 	}
 
-	@SafeVarargs
-	static <T> T firstNotEmpty(T... objects) {
-		for (int i = 0; i < objects.length; i++) {
-			if (TimiJava.isNotEmpty(objects[i])) {
-				return objects[i];
+	static <T> T defaultIfEmpty(T obj, T defaultObj) {
+		if (isEmpty(obj)) {
+			return defaultObj;
 		}
-		}
-		return null;
+		return obj;
 	}
 
 	static String toString(Exception e) {
@@ -94,4 +87,8 @@ public interface TimiJava {
 		e.printStackTrace(pw);
 		return sw.toString();
 	}
+
+	static <T> Iterable<T> safeIterable(Iterable<T> iterable) {
+		return defaultIfNull(iterable, Collections::emptyIterator);
+	}
 }