WIP

node_modules/n3/lib/N3StreamWriter.js

@@ -0,0 +1,58 @@
+"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;