| 1 | import { isTerm, isTermLike, Term } from "./term.js";
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| 2 | import { isNamedNode } from "./named-node.js";
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| 3 | import { isNamedNodeLike } from "./named-node.js";
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| 4 | import { hasKey } from "./has-key.js";
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| 5 | export function isLiteralLike(given, value) {
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| 6 | return (isTermLike(given, "Literal", value) &&
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| 7 | hasKey(given, "language") &&
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| 8 | typeof given.language === "string" &&
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| 9 | (!hasKey(given, "datatype") ||
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| 10 | (hasKey(given, "datatype") &&
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| 11 | !given.datatype) ||
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| 12 | (hasKey(given, "datatype") &&
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| 13 | isNamedNodeLike(given.datatype))));
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| 14 | }
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| 15 | export function isLiteral(given, value) {
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| 16 | return (isTerm(given, "Literal", value) &&
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| 17 | hasKey(given, "language") &&
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| 18 | typeof given.language === "string" &&
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| 19 | (!hasKey(given, "datatype") ||
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| 20 | (hasKey(given, "datatype") &&
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| 21 | !given.datatype) ||
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| 22 | (hasKey(given, "datatype") &&
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| 23 | isNamedNode(given.datatype))));
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| 24 | }
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| 25 | export class Literal extends Term {
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| 26 | constructor(value, language, datatype) {
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| 27 | super("Literal", value);
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| 28 | this.language = language;
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| 29 | this.datatype = datatype;
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| 30 | }
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| 31 | equals(other) {
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| 32 | return (isLiteralLike(other, this.value) &&
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| 33 | this.language === this.language &&
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| 34 | ((!this.datatype && !other.datatype) ||
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| 35 | (this.datatype && this.datatype.equals(other.datatype))));
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| 36 | }
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| 37 | toJSON() {
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| 38 | return {
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| 39 | termType: this.termType,
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| 40 | value: this.value,
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| 41 | language: this.language,
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| 42 | datatype: this.datatype
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| 43 | };
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| 44 | }
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| 45 | }
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| 46 | |
| \ | No newline at end of file |