org.hibernate.ogm.datastore.mongodb.dialect.impl

Class MongoHelpers

java.lang.Object

org.hibernate.ogm.datastore.mongodb.dialect.impl.MongoHelpers

public class MongoHelpers
extends Object

Provides functionality for dealing with (nested) fields of MongoDB documents.

Author:

Alan Fitton <alan at eth0.org.uk>, Emmanuel Bernard <emmanuel@hibernate.org>, Gunnar Morling

Constructor Summary

Constructors

Constructor and Description
MongoHelpers()

Method Summary

Modifier and Type	Method and Description
static String	flatten(String left, String right) Links the two field names into a single left.right field name.
static Object	getValueOrNull(com.mongodb.DBObject entity, String dotPath)
static <T> T	getValueOrNull(com.mongodb.DBObject entity, String dotPath, Class<T> type)
static boolean	hasField(com.mongodb.DBObject entity, String dotPath)
static void	resetValue(com.mongodb.DBObject entity, String column) Remove a column from the DBObject
static void	setValue(com.mongodb.DBObject entity, String column, Object value)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MongoHelpers

public MongoHelpers()

Method Detail

setValue

public static void setValue(com.mongodb.DBObject entity,
                            String column,
                            Object value)

resetValue

public static void resetValue(com.mongodb.DBObject entity,
                              String column)

Remove a column from the DBObject

Parameters:

entity - the DBObject with the column

column - the column to remove

hasField

public static boolean hasField(com.mongodb.DBObject entity,
                               String dotPath)

getValueOrNull

public static <T> T getValueOrNull(com.mongodb.DBObject entity,
                                   String dotPath,
                                   Class<T> type)

getValueOrNull

public static Object getValueOrNull(com.mongodb.DBObject entity,
                                    String dotPath)

flatten

public static String flatten(String left,
                             String right)

Links the two field names into a single left.right field name. If the left field is empty, right is returned

Parameters:

left - one field name

right - the other field name

Returns:

left.right or right if left is an empty string