com.bigdata.rdf.sparql.ast.eval

Class ASTSearchOptimizerBase

java.lang.Object

com.bigdata.rdf.sparql.ast.eval.ASTSearchOptimizerBase

All Implemented Interfaces:

IASTOptimizer

Direct Known Subclasses:

ASTFulltextSearchOptimizer, ASTGeoSpatialSearchOptimizer, ASTSearchOptimizer

public abstract class ASTSearchOptimizerBase
extends Object
implements IASTOptimizer

Translate FTS.SEARCH and related magic predicates into a ServiceNode which will invoke the bigdata search engine.

 with {
    select ?subj ?score
    where {
      ?res fts:search "foo" .
      ?res fts:endpoint "http://my.solr.endpoint"
      ?res fts:relevance ?score .
    }
 } as %searchSet1
 

Version:

$Id$

Author:

Bryan Thompson, Michael Schmidt

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ASTSearchOptimizerBase()

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract String	getNamespace() Get the namespace variables.
protected abstract org.openrdf.model.URI	getSearchPredicate() Get the search predicate variables.
protected abstract Set<org.openrdf.model.URI>	getSearchUris() Get the search URIs fields.
QueryNodeWithBindingSet	optimize(AST2BOpContext context, QueryNodeWithBindingSet input) Optimize the AST.

Methods inherited from class java.lang.Object

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

Constructor Detail

ASTSearchOptimizerBase

protected ASTSearchOptimizerBase()

Method Detail

getSearchUris

protected abstract Set<org.openrdf.model.URI> getSearchUris()

Get the search URIs fields.

getNamespace

protected abstract String getNamespace()

Get the namespace variables.

getSearchPredicate

protected abstract org.openrdf.model.URI getSearchPredicate()

Get the search predicate variables.

optimize

public QueryNodeWithBindingSet optimize(AST2BOpContext context,
                               QueryNodeWithBindingSet input)

Description copied from interface: IASTOptimizer

Optimize the AST.

Specified by:

optimize in interface IASTOptimizer

Parameters:

context - The evaluation context.

input - The input to the optimizer, consisting of a queryNode and input binding set.

Returns:

An instance of type QueryNodeWithBindingSet.