Fix QueryMapper property path resolution for nested paths containing numeric values.

Prior to this fix a path that contains numeric values used as position parameters would have been stripped in a way that left out the last digit. This could lead to wrong path resolution if the incorrectly constructed property name accidentally matched an existing one.

Closes: #4426
Original Pull Request: #4427

Author: lijixue

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/QueryMapper.java

@@ -1218,6 +1218,18 @@ private PersistentPropertyPath<MongoPersistentProperty> getPath(String pathExpre
 
 			String rawPath = removePlaceholders(POSITIONAL_OPERATOR,
 					removePlaceholders(DOT_POSITIONAL_PATTERN, pathExpression));
+            // fix xx.11.22.33 becomes xx3, it should be xx.33, then path should be null. (test mapNestedLastBigIntegerFieldCorrectly)
+            if (pathExpression.contains(".")) {
+                String lastDotString = pathExpression.substring(pathExpression.lastIndexOf("."));
+                int lastDotLength = lastDotString.length();
+                int newLength = 0;
+                if (rawPath.contains(".")) {
+                    newLength = rawPath.substring(rawPath.lastIndexOf(".")).length();
+                }
+                if (lastDotLength != newLength) {
+                    rawPath = rawPath.substring(0, rawPath.length() - 1) + lastDotString;
+                }
+            }
 
 			if (sourceProperty != null && sourceProperty.getOwner().equals(entity)) {
 				return mappingContext.getPersistentPropertyPath(

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/convert/UpdateMapperUnitTests.java

@@ -1223,6 +1223,16 @@ void mapNestedIntegerFieldCorrectly() {
 		assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set", new org.bson.Document("levelOne.0.1.3", "4")));
 	}
 
+    @Test
+    void mapNestedLastBigIntegerFieldCorrectly() {
+
+        Update update = new Update().set("levelOne.0.1.32", "4");
+        Document mappedUpdate = mapper.getMappedObject(update.getUpdateObject(),
+            context.getPersistentEntity(EntityWithNestedMap.class));
+
+        assertThat(mappedUpdate).isEqualTo(new org.bson.Document("$set", new org.bson.Document("levelOne.0.1.32", "4")));
+    }
+
 	@Test // GH-3775
 	void mapNestedMixedStringIntegerFieldCorrectly() {
 
@@ -1720,6 +1730,8 @@ static class UnwrappableType {
 
 	static class EntityWithNestedMap {
 		Map<String, Map<String, Map<String, Object>>> levelOne;
+        // for test mapNestedLastBigIntegerFieldCorrectly()
+		Map<String, Map<String, Map<String, Object>>> levelOne2;
 	}
 
 	static class Customer {