@bahulneel/rdflib
Version:
an RDF library for node.js. Suitable for client and server side.
229 lines (191 loc) • 6.39 kB
JavaScript
import _typeof from "@babel/runtime/helpers/typeof";
import _classCallCheck from "@babel/runtime/helpers/classCallCheck";
import _createClass from "@babel/runtime/helpers/createClass";
import _possibleConstructorReturn from "@babel/runtime/helpers/possibleConstructorReturn";
import _getPrototypeOf from "@babel/runtime/helpers/getPrototypeOf";
import _assertThisInitialized from "@babel/runtime/helpers/assertThisInitialized";
import _inherits from "@babel/runtime/helpers/inherits";
import _defineProperty from "@babel/runtime/helpers/defineProperty";
import ClassOrder from './class-order';
import RDFlibNamedNode from './named-node';
import Node from './node-internal';
import { LiteralTermType } from './types';
import { isLiteral } from './utils/terms';
import XSD from './xsd-internal';
/**
* An RDF literal, containing some value which isn't expressed as an IRI.
* @link https://rdf.js.org/data-model-spec/#literal-interface
*/
// @ts-ignore Incorrectly extends due to fromValue()
var Literal =
/*#__PURE__*/
function (_Node) {
_inherits(Literal, _Node);
/**
* The literal's datatype as a named node
*/
/**
* The language for the literal
*/
/**
* Initializes a literal
* @param value - The literal's lexical value
* @param language - The language for the literal. Defaults to ''.
* @param datatype - The literal's datatype as a named node. Defaults to xsd:string.
*/
function Literal(value, language, datatype) {
var _this;
_classCallCheck(this, Literal);
_this = _possibleConstructorReturn(this, _getPrototypeOf(Literal).call(this, value));
_defineProperty(_assertThisInitialized(_this), "termType", LiteralTermType);
_defineProperty(_assertThisInitialized(_this), "classOrder", ClassOrder.Literal);
_defineProperty(_assertThisInitialized(_this), "datatype", XSD.string);
_defineProperty(_assertThisInitialized(_this), "isVar", 0);
_defineProperty(_assertThisInitialized(_this), "language", '');
if (language) {
_this.language = language;
_this.datatype = XSD.langString;
} else if (datatype) {
_this.datatype = RDFlibNamedNode.fromValue(datatype);
} else {
_this.datatype = XSD.string;
}
return _this;
}
/**
* Gets a copy of this literal
*/
_createClass(Literal, [{
key: "copy",
value: function copy() {
return new Literal(this.value, this.lang, this.datatype);
}
/**
* Gets whether two literals are the same
* @param other The other statement
*/
}, {
key: "equals",
value: function equals(other) {
if (!other) {
return false;
}
return this.termType === other.termType && this.value === other.value && this.language === other.language && (!this.datatype && !other.datatype || this.datatype && this.datatype.equals(other.datatype));
}
/**
* The language for the literal
* @deprecated use {language} instead
*/
}, {
key: "toNT",
value: function toNT() {
return Literal.toNT(this);
}
/** Serializes a literal to an N-Triples string */
}, {
key: "toString",
value: function toString() {
return '' + this.value;
}
/**
* Builds a literal node from a boolean value
* @param value - The value
*/
}, {
key: "lang",
get: function get() {
return this.language;
},
set: function set(language) {
this.language = language || '';
}
}], [{
key: "toNT",
value: function toNT(literal) {
if (typeof literal.value === 'number') {
return '' + literal.value;
} else if (typeof literal.value !== 'string') {
throw new Error('Value of RDF literal is not string or number: ' + literal.value);
}
var str = literal.value;
str = str.replace(/\\/g, '\\\\');
str = str.replace(/\"/g, '\\"');
str = str.replace(/\n/g, '\\n');
str = '"' + str + '"';
if (literal.language) {
str += '@' + literal.language;
} else if (!literal.datatype.equals(XSD.string)) {
// Only add datatype if it's not a string
str += '^^' + literal.datatype.toCanonical();
}
return str;
}
}, {
key: "fromBoolean",
value: function fromBoolean(value) {
var strValue = value ? '1' : '0';
return new Literal(strValue, null, XSD.boolean);
}
/**
* Builds a literal node from a date value
* @param value The value
*/
}, {
key: "fromDate",
value: function fromDate(value) {
if (!(value instanceof Date)) {
throw new TypeError('Invalid argument to Literal.fromDate()');
}
var d2 = function d2(x) {
return ('' + (100 + x)).slice(1, 3);
};
var date = '' + value.getUTCFullYear() + '-' + d2(value.getUTCMonth() + 1) + '-' + d2(value.getUTCDate()) + 'T' + d2(value.getUTCHours()) + ':' + d2(value.getUTCMinutes()) + ':' + d2(value.getUTCSeconds()) + 'Z';
return new Literal(date, null, XSD.dateTime);
}
/**
* Builds a literal node from a number value
* @param value - The value
*/
}, {
key: "fromNumber",
value: function fromNumber(value) {
if (typeof value !== 'number') {
throw new TypeError('Invalid argument to Literal.fromNumber()');
}
var datatype;
var strValue = value.toString();
if (strValue.indexOf('e') < 0 && Math.abs(value) <= Number.MAX_SAFE_INTEGER) {
datatype = Number.isInteger(value) ? XSD.integer : XSD.decimal;
} else {
datatype = XSD.double;
}
return new Literal(strValue, null, datatype);
}
/**
* Builds a literal node from an input value
* @param value - The input value
*/
}, {
key: "fromValue",
value: function fromValue(value) {
if (isLiteral(value)) {
return value;
}
switch (_typeof(value)) {
case 'object':
if (value instanceof Date) {
return Literal.fromDate(value);
}
case 'boolean':
return Literal.fromBoolean(value);
case 'number':
return Literal.fromNumber(value);
case 'string':
return new Literal(value);
}
throw new Error("Can't make literal from " + value + ' of type ' + _typeof(value));
}
}]);
return Literal;
}(Node);
export { Literal as default };