DATAMONGO-631 - Explictly reject Order instances with ignore-case flag.

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

@@ -24,6 +24,7 @@ import java.util.List;
 
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Sort;
+import org.springframework.data.domain.Sort.Order;
 import org.springframework.data.mongodb.InvalidMongoDbApiUsageException;
 import org.springframework.util.Assert;
 
@@ -150,6 +151,13 @@ public class Query {
 			return this;
 		}
 
+		for (Order order : sort) {
+			if (order.isIgnoreCase()) {
+				throw new IllegalArgumentException(String.format("Gven sort contained an Order for %s with ignore case! "
+						+ "MongoDB does not support sorting ignoreing case currently!", order.getProperty()));
+			}
+		}
+
 		if (this.coreSort == null) {
 			this.coreSort = sort;
 		} else {

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2012 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.
@@ -20,12 +20,24 @@ import static org.junit.Assert.*;
 import static org.springframework.data.mongodb.core.query.Criteria.*;
 
 import org.junit.Assert;
+import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.springframework.data.domain.Sort;
 import org.springframework.data.domain.Sort.Direction;
 import org.springframework.data.mongodb.InvalidMongoDbApiUsageException;
 
+/**
+ * Unit tests for {@link Query}.
+ * 
+ * @author Thomas Risberg
+ * @author Oliver Gierke
+ */
 public class QueryTests {
 
+	@Rule
+	public ExpectedException exception = ExpectedException.none();
+
 	@Test
 	public void testSimpleQuery() {
 		Query q = new Query(where("name").is("Thomas").and("age").lt(80));
@@ -170,4 +182,13 @@ public class QueryTests {
 		Query query = new Query().with(new org.springframework.data.domain.Sort(Direction.DESC, "foo"));
 		assertThat(query.getSortObject().toString(), is("{ \"foo\" : -1}"));
 	}
+
+	@Test
+	public void rejectsOrderWithIgnoreCase() {
+
+		exception.expect(IllegalArgumentException.class);
+		exception.expectMessage("foo");
+
+		new Query().with(new Sort(new Sort.Order("foo").ignoreCase()));
+	}
 }