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Bergwinkl","email":"bergi@axolotlfarm.org"},"license":"MIT","homepage":"https://github.com/rdfjs-base/sink-map","keywords":["map","rdf","rdfjs","sink"],"repository":{"url":"git+https://github.com/rdfjs-base/sink-map.git","type":"git"},"description":"Map for RDF/JS Sinks including shortcut methods","maintainers":[{"email":"bergi@bergnet.org","name":"bergos"},{"email":"matthieubosquet@gmail.com","name":"matthieubosquet"}],"readme":"# @rdfjs/sink-map\n\n[![build status](https://img.shields.io/github/actions/workflow/status/rdfjs-base/sink-map/test.yaml?branch=master)](https://github.com/rdfjs-base/sink-map/actions/workflows/test.yaml)\n[![npm version](https://img.shields.io/npm/v/@rdfjs/sink-map.svg)](https://www.npmjs.com/package/@rdfjs/sink-map)\n\nMap for [RDF/JS Sink](http://rdf.js.org/stream-spec/#sink-interface) including shortcut methods.\n\n## Usage\n\nThe package provides Map from a string key to a Sink with a shortcut for `.import`.\nTypical it's used to store parsers or serializers for specific media types.\nAs SinkMap extends from the [ECMAScript 2015 Map](https://www.ecma-international.org/ecma-262/6.0/#sec-map-objects) and doesn't overload any standard methods, methods like `set`, `get`, `has` or `delete` can be used as defined in the specification.\n\n### Create a SinkMap\nThe constructor accepts arrays with key/sink pairs to fill the map:\n\n```javascript\nconst map = new SinkMap([\n ['text/turtle', new ParserN3()]\n])\n```\n\nIt's also possible to create an empty map and add or extend it later using the `.set()` method:\n\n```javascript\nconst map = new SinkMap()\n\nmap.set('text/turtle') = new ParserN3()\n```\n\n### Find a Sink\n\nThe `.get` method searches for the matching Sink and returns it:\n\n```javascript\nconst map = new SinkMap([...])\n\nconst sink = map.get('text/turtle')\n\nif (sink) {\n // found\n} else {\n // not found\n}\n```\n\n### Import shortcut\n\nUsually you want to call the `.import` method of the matching Sink.\nThe map provides a shortcut for this.\nIt also has a `.import` method, but requires additionally the key as the first argument.\nIt returns `null` if no matching sink was found:\n\n```javascript\nconst map = new SinkMap([...])\n\nconst input = fs.createReadStream('..')\nconst output = map.import('text/turtle', input)\n\nif (output) {\n // found\n} else {\n // not found\n}\n```\n\n### Example\n\nHere is a complete example where the map is used to store parsers and the `.import` shortcut is used to parse a string input:\n\n```javascript\nimport SinkMap from '@rdfjs/sink-map'\nimport ParserN3 from '@rdfjs/parser-n3'\nimport { Readable } from 'readable-stream'\n\nconst map = new SinkMap([\n ['text/turtle', new ParserN3()]\n])\n\nconst input = new Readable({\n read: () => {\n input.push(`\n PREFIX s: \n\n [] a s:Person ;\n s:jobTitle \"Professor\" ;\n s:name \"Jane Doe\" ;\n s:telephone \"(425) 123-4567\" ;\n s:url .\n `)\n input.push(null)\n }\n})\n\nconst output = map.import('text/turtle', input)\n\noutput.on('data', quad => {\n console.log(`${quad.subject.value} - ${quad.predicate.value} - ${quad.object.value}`)\n})\n```\n","readmeFilename":"README.md"}