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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
import { Vector } from '../vector.mjs';
import { valueToString } from '../util/pretty.mjs';
import { instance as getVisitor } from '../visitor/get.mjs';
import { instance as setVisitor } from '../visitor/set.mjs';
/** @ignore */ export const kKeys = Symbol.for('keys');
/** @ignore */ export const kVals = Symbol.for('vals');
export class MapRow {
constructor(slice) {
this[kKeys] = new Vector([slice.children[0]]).memoize();
this[kVals] = slice.children[1];
return new Proxy(this, new MapRowProxyHandler());
}
[Symbol.iterator]() {
return new MapRowIterator(this[kKeys], this[kVals]);
}
get size() { return this[kKeys].length; }
toArray() { return Object.values(this.toJSON()); }
toJSON() {
const keys = this[kKeys];
const vals = this[kVals];
const json = {};
for (let i = -1, n = keys.length; ++i < n;) {
json[keys.get(i)] = getVisitor.visit(vals, i);
}
return json;
}
toString() {
return `{${[...this].map(([key, val]) => `${valueToString(key)}: ${valueToString(val)}`).join(', ')}}`;
}
[Symbol.for('nodejs.util.inspect.custom')]() {
return this.toString();
}
}
class MapRowIterator {
constructor(keys, vals) {
this.keys = keys;
this.vals = vals;
this.keyIndex = 0;
this.numKeys = keys.length;
}
[Symbol.iterator]() { return this; }
next() {
const i = this.keyIndex;
if (i === this.numKeys) {
return { done: true, value: null };
}
this.keyIndex++;
return {
done: false,
value: [
this.keys.get(i),
getVisitor.visit(this.vals, i),
]
};
}
}
/** @ignore */
class MapRowProxyHandler {
isExtensible() { return false; }
deleteProperty() { return false; }
preventExtensions() { return true; }
ownKeys(row) {
return row[kKeys].toArray().map(String);
}
has(row, key) {
return row[kKeys].includes(key);
}
getOwnPropertyDescriptor(row, key) {
const idx = row[kKeys].indexOf(key);
if (idx !== -1) {
return { writable: true, enumerable: true, configurable: true };
}
return;
}
get(row, key) {
// Look up key in row first
if (Reflect.has(row, key)) {
return row[key];
}
const idx = row[kKeys].indexOf(key);
if (idx !== -1) {
const val = getVisitor.visit(Reflect.get(row, kVals), idx);
// Cache key/val lookups
Reflect.set(row, key, val);
return val;
}
}
set(row, key, val) {
const idx = row[kKeys].indexOf(key);
if (idx !== -1) {
setVisitor.visit(Reflect.get(row, kVals), idx, val);
// Cache key/val lookups
return Reflect.set(row, key, val);
}
else if (Reflect.has(row, key)) {
return Reflect.set(row, key, val);
}
return false;
}
}
Object.defineProperties(MapRow.prototype, {
[Symbol.toStringTag]: { enumerable: false, configurable: false, value: 'Row' },
[kKeys]: { writable: true, enumerable: false, configurable: false, value: null },
[kVals]: { writable: true, enumerable: false, configurable: false, value: null },
});
//# sourceMappingURL=map.mjs.map
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