Next sparql/triples patterns bgp#275
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| /** | ||
| * if true stop the parsing and throw an exception | ||
| * @return |
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| /** | ||
| * if true collect the error in a List | ||
| * @return |
| /** | ||
| * Returns collected errors as human-friendly strings. | ||
| * <p>Prefer {@link #getDiagnostics()} for structured access.</p> | ||
| * @return |
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| /** | ||
| * Constructor | ||
| * @param kind |
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| * Abstract Syntax Tree (AST) representation of a SPARQL {@code ASK} query. | ||
| * ASK WHERE { pattern } returns a boolean. | ||
| * | ||
| * PREFIX foaf: <http://xmlns.com/foaf/0.1/> |
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| * Abstract Syntax Tree (AST) representation of a SPARQL {@code CONSTRUCT} query. | ||
| * CONSTRUCT { template } WHERE { pattern }. | ||
| * | ||
| * PREFIX foaf: <http://xmlns.com/foaf/0.1/> |
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| * Abstract Syntax Tree (AST) representation of a SPARQL {@code DESCRIBE} query. | ||
| * DESCRIBE (var|uri)* WHERE { pattern } or DESCRIBE (var|uri)*. | ||
| * | ||
| * DESCRIBE <http://example.org/> |
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| package fr.inria.corese.core.next.query.impl.sparql.bridge; | ||
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| public class CoresePatternBuilder { | ||
| import fr.inria.corese.core.next.query.impl.sparql.ast.BgpAst; |
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| public class CoreseTermAdapter { | ||
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| import fr.inria.corese.core.next.query.impl.sparql.ast.IriAst; | ||
| import fr.inria.corese.core.next.query.impl.sparql.ast.LiteralAst; |
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| package fr.inria.corese.core.next.query.impl.sparql; | ||
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| public class CoreseQueryArtifactAdapter { | ||
| import fr.inria.corese.core.next.query.impl.sparql.ast.QueryAst; |
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SPARQL NEXT : Triples patterns and Basic Graph Pattern :
We add
Overview of the code :
QueryAst).Parser
For the Parser we follow the pattern and implementation of the IO Parser i.e; parser, options, and listener.
QueryParserproduce aQueryAstfrom a String aReaderor anInputStream. We also have error handling.SparqlParserOptions
The Options are following the same builder pattern we can find in IO.
SparqlListener
The SparqlListener follow the delegate pattern we can find in the Turtle and Trig Listerners. This is the rules we support for the moment :
GroupGraphPattern,TriplesBlock,TriplesSameSubjectSparqlAstBuilder
The SparqlAstBuilder construct the AST form the listeners. It should produce a QueryAST
SparqlBgpFeature
feature of ANTLR that drive the builder for triple patterns and BGP.
AST
The AST are the Immutable representation of the query and the terms in the query. (equivalent of case class in scala)