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comparison web/SyncedGraph.ts @ 2440:d1f86109e3cc

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more *value getter variants
author drewp@bigasterisk.com
date Thu, 30 May 2024 01:08:45 -0700
parents ac55319a2eac
children
comparison
equal deleted inserted replaced
2439:06da5db2fafe 2440:d1f86109e3cc
213 //label = label + @serial 213 //label = label + @serial
214 214
215 this.autoDeps.runHandler(func, label); 215 this.autoDeps.runHandler(func, label);
216 } 216 }
217 217
218 _singleValue(s: Quad_Subject, p: Quad_Predicate) { 218 _singleValue(s: Quad_Subject, p: Quad_Predicate, _nullNotError: boolean) {
219 this.autoDeps.askedFor(s, p, null, null); 219 this.autoDeps.askedFor(s, p, null, null);
220 const quads = this.graph.getQuads(s, p, null, null); 220 const quads = this.graph.getQuads(s, p, null, null);
221 const objs = new Set(Array.from(quads).map((q: Quad) => q.object)); 221 const objs = new Set(Array.from(quads).map((q: Quad) => q.object));
222 222
223 switch (objs.size) { 223 switch (objs.size) {
224 case 0: 224 case 0:
225 if (_nullNotError) {
226 return null;
227 }
225 throw new Error("no value for " + s.value + " " + p.value); 228 throw new Error("no value for " + s.value + " " + p.value);
226 case 1: 229 case 1:
227 var obj = objs.values().next().value; 230 var obj = objs.values().next().value;
228 return obj; 231 return obj;
229 default: 232 default:
230 throw new Error("too many different values: " + JSON.stringify(quads)); 233 throw new Error("too many different values: " + JSON.stringify(quads));
231 } 234 }
232 } 235 }
233 236
234 floatValue(s: Quad_Subject, p: Quad_Predicate) { 237 floatValue(s: Quad_Subject, p: Quad_Predicate, _nullNotError = false) {
235 const key = s.value + "|" + p.value; 238 const key = s.value + "|" + p.value;
236 const hit = this.cachedFloatValues.get(key); 239 const hit = this.cachedFloatValues.get(key);
237 if (hit !== undefined) { 240 if (hit !== undefined) {
238 return hit; 241 return hit;
239 } 242 }
240 //log('float miss', s, p) 243 //log('float miss', s, p)
241 244
242 const v = this._singleValue(s, p).value; 245 const gv = this._singleValue(s, p, _nullNotError);
246 if (_nullNotError && gv == null) return null;
247 const v = gv.value;
243 const ret = parseFloat(v); 248 const ret = parseFloat(v);
244 if (isNaN(ret)) { 249 if (isNaN(ret)) {
245 throw new Error(`${s.value} ${p.value} -> ${v} not a float`); 250 throw new Error(`${s.value} ${p.value} -> ${v} not a float`);
246 } 251 }
247 this.cachedFloatValues.set(key, ret); 252 this.cachedFloatValues.set(key, ret);
248 return ret; 253 return ret;
249 } 254 }
250 255
251 stringValue(s: any, p: any) { 256 _booleanValue(s: any, p: any, _nullNotError = false) {
252 return this._singleValue(s, p).value; 257 const gv = this._singleValue(s, p, _nullNotError);
253 } 258 if (_nullNotError && gv == null) return null;
254 259 return gv.value == "true";
255 uriValue(s: Quad_Subject, p: Quad_Predicate) { 260 }
261 booleanValue(s: any, p: any): boolean {
262 return this._booleanValue(s, p, false) as boolean;
263 }
264 stringValue(s: any, p: any, _nullNotError = false) {
265 const gv = this._singleValue(s, p, _nullNotError);
266 if (_nullNotError && gv == null) return null;
267 return gv.value;
268 }
269
270 uriValue(s: Quad_Subject, p: Quad_Predicate, _nullNotError = false) {
256 const key = s.value + "|" + p.value; 271 const key = s.value + "|" + p.value;
257 const hit = this.cachedUriValues.get(key); 272 const hit = this.cachedUriValues.get(key);
258 if (hit !== undefined) { 273 if (hit !== undefined) {
259 return hit; 274 return hit;
260 } 275 }
261 276
262 const ret = this._singleValue(s, p); 277 const gv = this._singleValue(s, p, _nullNotError);
263 this.cachedUriValues.set(key, ret); 278 if (_nullNotError && gv == null) return null;
264 return ret; 279 this.cachedUriValues.set(key, gv);
280 return gv;
281 }
282
283 optionalFloatValue(s: Quad_Subject, p: Quad_Predicate): number | null {
284 return this.floatValue(s, p, true);
285 }
286 optionalBooleanValue(s: Quad_Subject, p: Quad_Predicate): boolean | null {
287 return this._booleanValue(s, p, true);
288 }
289 optionalStringValue(s: Quad_Subject, p: Quad_Predicate): string | null {
290 return this.stringValue(s, p, true);
291 }
292 optionalUriValue(s: Quad_Subject, p: Quad_Predicate): N3.NamedNode | null {
293 return this.uriValue(s, p, true);
265 } 294 }
266 295
267 labelOrTail(uri: { value: { split: (arg0: string) => any } }) { 296 labelOrTail(uri: { value: { split: (arg0: string) => any } }) {
268 let ret: any; 297 let ret: any;
269 try { 298 try {