58 lines
1.4 KiB
JavaScript
58 lines
1.4 KiB
JavaScript
"use strict";
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports.default = void 0;
|
|
var _readableStream = require("readable-stream");
|
|
var _N3Writer = _interopRequireDefault(require("./N3Writer"));
|
|
function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
|
|
// **N3StreamWriter** serializes a quad stream into a text stream.
|
|
|
|
// ## Constructor
|
|
class N3StreamWriter extends _readableStream.Transform {
|
|
constructor(options) {
|
|
super({
|
|
encoding: 'utf8',
|
|
writableObjectMode: true
|
|
});
|
|
|
|
// Set up writer with a dummy stream object
|
|
const writer = this._writer = new _N3Writer.default({
|
|
write: (quad, encoding, callback) => {
|
|
this.push(quad);
|
|
callback && callback();
|
|
},
|
|
end: callback => {
|
|
this.push(null);
|
|
callback && callback();
|
|
}
|
|
}, options);
|
|
|
|
// Implement Transform methods on top of writer
|
|
this._transform = (quad, encoding, done) => {
|
|
writer.addQuad(quad, done);
|
|
};
|
|
this._flush = done => {
|
|
writer.end(done);
|
|
};
|
|
}
|
|
|
|
// ### Serializes a stream of quads
|
|
import(stream) {
|
|
stream.on('data', quad => {
|
|
this.write(quad);
|
|
});
|
|
stream.on('end', () => {
|
|
this.end();
|
|
});
|
|
stream.on('error', error => {
|
|
this.emit('error', error);
|
|
});
|
|
stream.on('prefix', (prefix, iri) => {
|
|
this._writer.addPrefix(prefix, iri);
|
|
});
|
|
return this;
|
|
}
|
|
}
|
|
exports.default = N3StreamWriter; |