@swaggerexpert/json-pointer
Version:
RCF 6901 implementation of JSON Pointer
53 lines • 1.73 kB
JavaScript
import { ObjectElement, ArrayElement } from 'minim';
import EvaluationRealm from "../EvaluationRealm.mjs";
import JSONPointerKeyError from "../../../errors/JSONPointerKeyError.mjs";
import JSONPointerIndexError from "../../../errors/JSONPointerIndexError.mjs";
class MinimEvaluationRealm extends EvaluationRealm {
name = 'minim';
isArray(node) {
return node instanceof ArrayElement && !(node instanceof ObjectElement);
}
isObject(node) {
return node instanceof ObjectElement;
}
sizeOf(node) {
if (this.isArray(node) || this.isObject(node)) {
return node.length;
}
return 0;
}
has(node, referenceToken) {
if (this.isArray(node)) {
const index = Number(referenceToken);
const indexUint32 = index >>> 0;
if (index !== indexUint32) {
throw new JSONPointerIndexError(`Invalid array index "${referenceToken}": index must be an unsinged 32-bit integer`, {
referenceToken,
currentValue: node,
realm: this.name
});
}
return indexUint32 < this.sizeOf(node);
}
if (this.isObject(node)) {
const keys = node.keys();
const uniqueKeys = new Set(keys);
if (keys.length !== uniqueKeys.size) {
throw new JSONPointerKeyError(`Object key "${referenceToken}" is not unique — JSON Pointer requires unique member names`, {
referenceToken,
currentValue: node,
realm: this.name
});
}
return node.hasKey(referenceToken);
}
return false;
}
evaluate(node, referenceToken) {
if (this.isArray(node)) {
return node.get(Number(referenceToken));
}
return node.get(referenceToken);
}
}
export default MinimEvaluationRealm;