org.eclipse.rdf4j.query.parser

Class QueryParserUtil

java.lang.Object

org.eclipse.rdf4j.query.parser.QueryParserUtil

public class QueryParserUtil
extends Object

Utility class for creating query parsers and parsing queries in various query languages.

Constructor Summary

Constructors

Constructor and Description
QueryParserUtil()

Method Summary

Modifier and Type	Method and Description
static QueryParser	createParser(QueryLanguage ql)
static ParsedBooleanQuery	parseBooleanQuery(QueryLanguage ql, String query, String baseURI) Parses the supplied query into a query model.
static ParsedGraphQuery	parseGraphQuery(QueryLanguage ql, String query, String baseURI) Parses the supplied query into a query model.
static ParsedOperation	parseOperation(QueryLanguage ql, String operation, String baseURI) Parses the supplied operation into a query model.
static ParsedQuery	parseQuery(QueryLanguage ql, String query, String baseURI) Parses the supplied query into a query model.
static ParsedTupleQuery	parseTupleQuery(QueryLanguage ql, String query, String baseURI) Parses the supplied query into a query model.
static ParsedUpdate	parseUpdate(QueryLanguage ql, String update, String baseURI) Parses the supplied update operation into a query model.
static String	removeSPARQLQueryProlog(String queryString) Removes SPARQL prefix and base declarations, if any, from the supplied SPARQL query string.

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryParserUtil

public QueryParserUtil()

Method Detail

createParser

public static QueryParser createParser(QueryLanguage ql)
                                throws UnsupportedQueryLanguageException

Throws:

UnsupportedQueryLanguageException

parseOperation

public static ParsedOperation parseOperation(QueryLanguage ql,
                                             String operation,
                                             String baseURI)
                                      throws MalformedQueryException

Parses the supplied operation into a query model.

Parameters:

ql - The language in which the operation is formulated.

operation - The operation.

baseURI - The base URI to resolve any relative URIs that are in the operation against, can be null if the operation does not contain any relative URIs.

Returns:

The model for the parsed operation.

Throws:

MalformedQueryException - If the supplied operation was malformed.

UnsupportedQueryLanguageException - If the specified query language is not supported.

parseUpdate

public static ParsedUpdate parseUpdate(QueryLanguage ql,
                                       String update,
                                       String baseURI)
                                throws MalformedQueryException,
                                       UnsupportedQueryLanguageException

Parses the supplied update operation into a query model.

Parameters:

ql - The language in which the update operation is formulated.

update - The update operation.

baseURI - The base URI to resolve any relative URIs that are in the operation against, can be null if the update operation does not contain any relative URIs.

Returns:

The model for the parsed update operation.

Throws:

MalformedQueryException - If the supplied update operation was malformed.

UnsupportedQueryLanguageException - If the specified query language is not supported.

parseQuery

public static ParsedQuery parseQuery(QueryLanguage ql,
                                     String query,
                                     String baseURI)
                              throws MalformedQueryException,
                                     UnsupportedQueryLanguageException

Parses the supplied query into a query model.

Parameters:

ql - The language in which the query is formulated.

query - The query.

baseURI - The base URI to resolve any relative URIs that are in the query against, can be null if the query does not contain any relative URIs.

Returns:

The query model for the parsed query.

Throws:

MalformedQueryException - If the supplied query was malformed.

UnsupportedQueryLanguageException - If the specified query language is not supported.

parseTupleQuery

public static ParsedTupleQuery parseTupleQuery(QueryLanguage ql,
                                               String query,
                                               String baseURI)
                                        throws MalformedQueryException,
                                               UnsupportedQueryLanguageException

Parses the supplied query into a query model.

Parameters:

ql - The language in which the query is formulated.

query - The query.

Returns:

The query model for the parsed query.

Throws:

IllegalArgumentException - If the supplied query is not a tuple query.

MalformedQueryException - If the supplied query was malformed.

UnsupportedQueryLanguageException - If the specified query language is not supported.

parseGraphQuery

public static ParsedGraphQuery parseGraphQuery(QueryLanguage ql,
                                               String query,
                                               String baseURI)
                                        throws MalformedQueryException,
                                               UnsupportedQueryLanguageException

Parses the supplied query into a query model.

Parameters:

ql - The language in which the query is formulated.

query - The query.

Returns:

The query model for the parsed query.

Throws:

IllegalArgumentException - If the supplied query is not a graph query.

MalformedQueryException - If the supplied query was malformed.

UnsupportedQueryLanguageException - If the specified query language is not supported.

parseBooleanQuery

public static ParsedBooleanQuery parseBooleanQuery(QueryLanguage ql,
                                                   String query,
                                                   String baseURI)
                                            throws MalformedQueryException,
                                                   UnsupportedQueryLanguageException

Parses the supplied query into a query model.

Parameters:

ql - The language in which the query is formulated.

query - The query.

Returns:

The query model for the parsed query.

Throws:

IllegalArgumentException - If the supplied query is not a graph query.

MalformedQueryException - If the supplied query was malformed.

UnsupportedQueryLanguageException - If the specified query language is not supported.

removeSPARQLQueryProlog

public static String removeSPARQLQueryProlog(String queryString)

Removes SPARQL prefix and base declarations, if any, from the supplied SPARQL query string. The supplied query string is assumed to be syntactically legal.

Parameters:

queryString - a syntactically legal SPARQL query string

Returns:

a substring of queryString, with prefix and base declarations removed.