82 lines
3.1 KiB
JavaScript
82 lines
3.1 KiB
JavaScript
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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import { Field } from '../schema';
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import { DataBufferBuilder } from './buffer';
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import { Builder } from '../builder';
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import { Union } from '../type';
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/** @ignore */
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export class UnionBuilder extends Builder {
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constructor(options) {
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super(options);
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this._typeIds = new DataBufferBuilder(new Int8Array(0), 1);
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if (typeof options['valueToChildTypeId'] === 'function') {
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this._valueToChildTypeId = options['valueToChildTypeId'];
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}
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}
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get typeIdToChildIndex() { return this.type.typeIdToChildIndex; }
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append(value, childTypeId) {
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return this.set(this.length, value, childTypeId);
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}
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set(index, value, childTypeId) {
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if (childTypeId === undefined) {
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childTypeId = this._valueToChildTypeId(this, value, index);
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}
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if (this.setValid(index, this.isValid(value))) {
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this.setValue(index, value, childTypeId);
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}
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return this;
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}
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// @ts-ignore
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setValue(index, value, childTypeId) {
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this._typeIds.set(index, childTypeId);
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super.setValue(index, value);
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}
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// @ts-ignore
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addChild(child, name = `${this.children.length}`) {
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const childTypeId = this.children.push(child);
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const { type: { children, mode, typeIds } } = this;
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const fields = [...children, new Field(name, child.type)];
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this.type = new Union(mode, [...typeIds, childTypeId], fields);
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return childTypeId;
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}
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/** @ignore */
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// @ts-ignore
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_valueToChildTypeId(builder, value, offset) {
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throw new Error(`Cannot map UnionBuilder value to child typeId. \
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Pass the \`childTypeId\` as the second argument to unionBuilder.append(), \
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or supply a \`valueToChildTypeId\` function as part of the UnionBuilder constructor options.`);
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}
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}
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/** @ignore */
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export class SparseUnionBuilder extends UnionBuilder {
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}
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/** @ignore */
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export class DenseUnionBuilder extends UnionBuilder {
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constructor(options) {
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super(options);
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this._offsets = new DataBufferBuilder(new Int32Array(0));
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}
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/** @ignore */
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setValue(index, value, childTypeId) {
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const childIndex = this.type.typeIdToChildIndex[childTypeId];
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this._offsets.set(index, this.getChildAt(childIndex).length);
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return super.setValue(index, value, childTypeId);
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}
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}
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//# sourceMappingURL=union.mjs.map
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