How to use text-search in mongo-spring aggregate

Question

How do I translate a simple mongo shell $match phrase, to it's equivelent in mongo-spring in Java - using aggregation?

$match: { $text: { $search: "read" } } 

Answer 1

Spring-data has inbuilt support for text search.

I have used following dependency :

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-mongodb</artifactId>
    <version>1.8.2.RELEASE</version>
</dependency>

Try Following Syntax :

TextCriteria criteria = TextCriteria.forDefaultLanguage().matchingAny("read");

Query query = TextQuery.queryText(criteria);    

List<klass> list = mongoTemplate.find(query, klass, "collection_name");

For more detail refer this.

To do the same in aggregation use following syntax :

BasicDBObject match = new BasicDBObject("$match", 
                new BasicDBObject("$text", new BasicDBObject("$search", "COST")));

List<DBObject> aggregationList = new ArrayList<DBObject>();
aggregationList.add(match);

AggregationOutput aggregationOutput = mongoTemplate.getCollection("categoryMaster")
        .aggregate(aggregationList);

List<DBObject> dbObjects = (List<DBObject>) aggregationOutput.results();

convert this dbobjects in your klass as below :

for(DBObject dbObject : dbObjects) {
    mongoTemplate.getConverter().read(klass, dbObject);
}