Prevent duplicate prefixes #163
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Instead of parsing the query manually, I would recommend plugging into the actual SPARQL parser. I don't remember if the jquery widget here will actually call the parser here directly. |
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Since it doesn't look like Jquery calls the parser, I'll have a look at doing it further up. Comunica seems like the logical place to do duplicate handling. For this case, using the last-defined prefix in the case of a duplicate should work. |
src/ldf-client-ui.js
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| var prefixesString = ''; | ||
| if (this.options.queryFormat === 'sparql') { | ||
| for (var prefix in this.options.prefixes) | ||
| prefixesString += 'PREFIX ' + prefix + ': <' + this.options.prefixes[prefix] + '>\n'; | ||
| } | ||
| let query = prefixesString + queryWithoutPrefixes; | ||
| let query = prefixesString + this.$queryTextsIndexed[this.options.queryFormat].val(); |
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Could you check if it's possible to pass these prefixes directly to the SparqlParser options?
I think there was an option for that.
If that's possible, we don't need the prefixesString anymore.
src/ldf-client-ui.js
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| let query = prefixesString + this.$queryTextsIndexed[this.options.queryFormat].val(); | ||
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| // Remove duplicate prefixes | ||
| const parsedQuery = new SparqlParser({ sparqlStar: true }).parse(query); |
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This can only be done if if (this.options.queryFormat === 'sparql') { (because queries can also be defined as GraphQL)
Fixing Issue #149.
Some questions:
Should I also account for "PREFIX" not being written all caps in the query?
Can I assume that PREFIX lines start with PREFIX or with only whitespace before?
Can I assume that each PREFIX declaration is on a seperate line starting with PREFIX? Or could there be multiple?
Can prefixes be declared deeper in the query or only at the top?