Package ai.platon.gora.mongodb.filters

Class MongoFilterUtil<K,T extends ai.platon.gora.persistency.impl.PersistentBase>

java.lang.Object

ai.platon.gora.mongodb.filters.MongoFilterUtil<K,T>

public class MongoFilterUtil<K,T extends ai.platon.gora.persistency.impl.PersistentBase>
extends Object

Manage creation of filtering Query using configured factories.

You can use "gora.mongodb.filter.factories" parameter to change factories implementations used.

Author:

Damien Raude-Morvan draudemorvan@dictanova.com

See Also:

• setFilter(Filter, MongoStore)

Field Summary

Fields

Modifier and Type	Field	Description
static final String	MONGO_FILTER_FACTORIES_PARAMETER	Configuration parameter which allow override of FilterFactory used.
static final String	MONGO_FILTERS_DEFAULT_FACTORY	Default implementation class for FilterFactory.

Constructor Summary

Constructors

Constructor	Description
MongoFilterUtil(org.apache.hadoop.conf.Configuration conf)

Method Summary

Modifier and Type	Method	Description
FilterFactory<K,T>	getFactory(ai.platon.gora.filter.Filter<K,T> filter)
Optional<org.bson.conversions.Bson>	setFilter(ai.platon.gora.filter.Filter<K,T> filter, MongoStore<K,T> store)	Set a filter on the query.

Methods inherited from class java.lang.Object

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

Field Details

MONGO_FILTERS_DEFAULT_FACTORY

public static final String MONGO_FILTERS_DEFAULT_FACTORY

Default implementation class for FilterFactory.

See Also:

• Constant Field Values

MONGO_FILTER_FACTORIES_PARAMETER

public static final String MONGO_FILTER_FACTORIES_PARAMETER

Configuration parameter which allow override of FilterFactory used.

See Also:

• Constant Field Values

Constructor Details

MongoFilterUtil

public MongoFilterUtil(org.apache.hadoop.conf.Configuration conf)
                throws ai.platon.gora.util.GoraException

Throws:

ai.platon.gora.util.GoraException

Method Details

getFactory

public FilterFactory<K,T> getFactory(ai.platon.gora.filter.Filter<K,T> filter)

setFilter

public Optional<org.bson.conversions.Bson> setFilter(ai.platon.gora.filter.Filter<K,T> filter,
 MongoStore<K,T> store)

Set a filter on the query. It translates a Gora filter to a MongoDB filter.

Parameters:

filter - The Gora filter.

store - The MongoStore.

Returns:

if remote filter is successfully applied.