DATAMONGO-630 - Support $setOnInsert update operator.

Original pull request: #70.

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/query/Update.java

@@ -31,6 +31,7 @@ import com.mongodb.DBObject;
  * @author Thomas Risberg
  * @author Mark Pollack
  * @author Oliver Gierke
+ * @author Becca Gaspard
  */
 public class Update {
 
@@ -90,6 +91,18 @@ public class Update {
 		return this;
 	}
 
+	/**
+	 * Update using the $setOnInsert update modifier
+	 * 
+	 * @param key
+	 * @param value
+	 * @return
+	 */
+	public Update setOnInsert(String key, Object value) {
+		addMultiFieldOperation("$setOnInsert", key, value);
+		return this;
+	}
+
 	/**
 	 * Update using the $unset update modifier
 	 * 

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/query/UpdateTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2011 the original author or authors.
+ * Copyright 2010-2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,9 +20,13 @@ import java.util.Map;
 
 import org.junit.Assert;
 import org.junit.Test;
-import org.springframework.data.mongodb.core.query.BasicUpdate;
-import org.springframework.data.mongodb.core.query.Update;
 
+/**
+ * Test cases for {@link Update}.
+ * 
+ * @author Oliver Gierke
+ * @author Becca Gaspard
+ */
 public class UpdateTests {
 
 	@Test
@@ -135,4 +139,22 @@ public class UpdateTests {
 		Assert.assertEquals("{ \"$inc\" : { \"size\" : 1} , \"$set\" : { \"directory\" : \"/Users/Test/Desktop\"}}", u
 				.getUpdateObject().toString());
 	}
+
+	/**
+	 * @see DATAMONGO-630
+	 */
+	@Test
+	public void testSetOnInsert() {
+		Update u = new Update().setOnInsert("size", 1);
+		Assert.assertEquals("{ \"$setOnInsert\" : { \"size\" : 1}}", u.getUpdateObject().toString());
+	}
+
+	/**
+	 * @see DATAMONGO-630
+	 */
+	@Test
+	public void testSetOnInsertSetOnInsert() {
+		Update u = new Update().setOnInsert("size", 1).setOnInsert("count", 1);
+		Assert.assertEquals("{ \"$setOnInsert\" : { \"size\" : 1 , \"count\" : 1}}", u.getUpdateObject().toString());
+	}
 }