[hibernate-dev] [HSEARCH] New Query API: last call

[Hardy Ferentschik]

Looks fine to me looking at the examples. I haven't tried myself writing
my own queries though
to see the full potential.

On Wed, 02 Jun 2010 18:00:20 +0200, Emmanuel Bernard
<emmanuel at hibernate.org> wrote:

> Guys,
> I'me now done with the level of abstraction and fluidity I wanted out of  
> the query DSL. Please review before we push that out. Key features:
>  - fluent API
>  - use the field bridge system: type is passed, not raw string
>  - use the analyzer transparently
>  - simple use case simple, complex use cases possible
>
> I'm showing below a few examples demonstrating key concepts.
>
> Please comment / ask questions.
>
> Term query
> query = monthQb
> 	.keyword()
> 	.onField( "monthValue" )
> 	.matching( 2 ) //note that monthValue is of type int
> 	.createQuery();
>
> //term query, showing analyzer integration
> query = monthQb
> 	.keyword()
> 	.onField( "mythology_ngram" )
> 	.matching( "snobored" ) //we apply the ngram filter here
> 	.createQuery();
>
> //use fuzzy query
> query = monthQb
> 		.keyword()
> 			.fuzzy()
> 				.threshold( .8f ) //optional
> 				.prefixLength( 1 )  //optional
> 		.onField( "mythology" )
> 		.matching( "calder" )
> 		.createQuery();
>
> //use wildcard queries
> monthQb
> 	.keyword()
> 		.wildcard()
> 	.onField( "mythology" )
> 	.matching( "mon*" )
> 	.createQuery();
>
> Alternative option
> //apply on multiple fields
> monthQb.keyword()
> 	.onField( "mythology" )
> 		.boostedTo( 30 )
> 	.andField( "history" )
> 	.matching( "whitening" )
> 	.createQuery();
>
> //boost a field
> monthQb
> 	.keyword()
> 	.onField( "history" )
> 		.boostedTo( 30 )
> 	.matching( "whitening" )
> 	.createQuery();
>
> Range query
> //Range query
> monthQb
> 	.range()
> 		.onField( "estimatedCreation" )
> 		.from( from ) #from and to are actual java.util.Date. We do the  
> conversion
> 		.to( to ).exclude()
> 		.createQuery();
>
> monthQb
> 	.range()
> 		.onField( "estimatedCreation" )
> 		.below( brithDay )
> 		.createQuery();
>
> Phrase query
> monthQb
> 	.phrase()
> 		.slop( 1 )
> 	.onField( "mythology" )
> 	.sentence( "Month whitening" )
> 	.createQuery();
>
> Boolean query
> monthQb
> 	.bool()
> 		.should( monthQb.keyword().onField( "mythology" ).matching(  
> "whitening" ).createQuery() )
> 		.should( monthQb.keyword().onField( "history" ).matching( "whitening"  
> ).createQuery() )
> 	.createQuery();
>
> //Boolean query all except (recommended)
> monthQb
> 	.all()
> 		.except( monthQb.keyword().onField( "mythology" ).matching( "colder"  
> ).createQuery() )
> 	.createQuery();
>
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