Adding date utility class

pom.xml

@@ -30,7 +30,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.github.OkraScheduler</groupId>
     <artifactId>OkraApi</artifactId>
-    <version>1.4.4</version>
+    <version>1.4.5</version>
 
     <properties>
         <source.enconding>UTF-8</source.enconding>

src/main/java/okra/base/AbstractOkra.java

@@ -24,8 +24,8 @@
 
 import lombok.Data;
 import okra.base.model.OkraItem;
-import okra.index.IndexDef;
-import okra.index.Ordering;
+import okra.base.model.index.IndexDef;
+import okra.base.model.index.Ordering;
 
 import java.util.Arrays;
 import java.util.List;

src/main/java/okra/base/Okra.java

@@ -23,7 +23,7 @@
 package okra.base;
 
 import okra.base.model.OkraItem;
-import okra.index.IndexDef;
+import okra.base.model.index.IndexDef;
 
 import java.util.List;
 

src/main/java/okra/base/async/AbstractOkraAsync.java

@@ -28,7 +28,7 @@
 import lombok.Setter;
 import okra.base.AbstractOkra;
 import okra.base.model.OkraItem;
-import okra.index.IndexDef;
+import okra.base.model.index.IndexDef;
 
 import java.util.List;
 

src/main/java/okra/index/IndexDef.java → src/main/java/okra/base/model/index/IndexDef.java

@@ -20,7 +20,7 @@
  * SOFTWARE.
  *
  */
-package okra.index;
+package okra.base.model.index;
 
 import lombok.AllArgsConstructor;
 import lombok.Data;

src/main/java/okra/index/Ordering.java → src/main/java/okra/base/model/index/Ordering.java

@@ -20,7 +20,7 @@
  * SOFTWARE.
  *
  */
-package okra.index;
+package okra.base.model.index;
 
 public enum Ordering {
 

src/main/java/okra/util/DateUtil.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2017 Okra Scheduler
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package okra.util;
+
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.util.Date;
+
+public final class DateUtil {
+
+    public static Date toDate(final LocalDateTime dateTime) {
+        if (dateTime == null) {
+            return null;
+        }
+
+        return Date.from(dateTime.atZone(ZoneId.systemDefault()).toInstant());
+    }
+
+    public static LocalDateTime toLocalDateTime(final Date date) {
+        if (date == null) {
+            return null;
+        }
+
+        return LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
+    }
+
+    public static Date nowMinusSeconds(final long seconds) {
+        return DateUtil.toDate(LocalDateTime.now().minusSeconds(seconds));
+    }
+}