Docs For Class LibRDF

Description

Implements interfaces:

Iterator (internal interface)

A wrapper around the librdf_query_results datatype.

This is the generic query results wrapper. There are three possible types of query results--boolean (those returned by SPARQL "ASK"), bindings (returned by "SELECT" in SPARQL and RDQL) and graph (such as those returned by SPARQL "CONSTRUCT" and "DESCRIBE")--each with a specialized class, but each is an iterable object. This creates an odd case for booleans, which are an iterator containing one element. As a special concession for this single-result case, LibRDF_BooleanQueryResults objects also have a method to simply retrieve the boolean value without iteration.

link: http://www.gophernet.org/projects/redland-php/
abstract:
version: Release: 1.0.0
license: LGPL/GPL/APACHE
copyright: 2006 David Shea
author: David Shea <david@gophernet.org>

Located in /QueryResults.php (line 59)

Direct descendents

Class	Description
LibRDF_BooleanQueryResults	A specialized librdf_query_results wrapper for boolean results.
LibRDF_GraphQueryResults	A specialized librdf_query_results wrapper for graph results.
LibRDF_BindingsQueryResults	A specialized librdf_query_results wrapper for bindings results.

Variable Summary

resource $query_results

Method Summary

static LibRDF_QueryResults makeQueryResults (resource $query_results)

void __destruct ()

string to_string ([string $uri = NULL], [string $base_uri = NULL])

void __clone ()

string __toString ()

Variables

resource $query_results (line 69)

The wrapped librdf_query_results datatype.

This resource must be set by the concrete query results classes.

access: protected

Methods

static method makeQueryResults (line 160)

Make a specialized query results object.

This function is intended for use by LibRDF_Query, allowing the creating of a specific query results object from a librdf_query_results resource.

return: The wrapped query results
access: public
throws: LibRDF_Error If unable to wrap the object

static LibRDF_QueryResults makeQueryResults (resource $query_results)

resource $query_results: The librdf_query_results resource to wrap

Destructor __destruct (line 77)

Free the query result resources.

access: public

void __destruct ()

to_string (line 126)

Serialize the results to a string.

return: The results as a string
access: public
throws: LibRDF_Error If unable to create a string from the results

string to_string ([string $uri = NULL], [string $base_uri = NULL])

string $uri: The uri of the target syntax or NULL
string $base_uri: The base URI for the output or NULL

__clone (line 95)

Clone the query.

Clonining a query is not supported, so this function disables the use of the clone keyword by setting the underlying resource to NULL and throwing an exception.

access: public
throws: LibRDF_Error Always

void __clone ()

__toString (line 112)

Return the query results as a string.

The language of the results depends on the query type.

return: The query results as a string
access: public

string __toString ()

Class LibRDF_QueryResults