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109 lines
2.7 KiB
109 lines
2.7 KiB
2 years ago
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'use strict';
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/*eslint-disable max-len*/
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var common = require('./common');
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var YAMLException = require('./exception');
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var Type = require('./type');
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function compileList(schema, name, result) {
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var exclude = [];
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schema.include.forEach(function (includedSchema) {
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result = compileList(includedSchema, name, result);
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});
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schema[name].forEach(function (currentType) {
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result.forEach(function (previousType, previousIndex) {
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if (previousType.tag === currentType.tag && previousType.kind === currentType.kind) {
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exclude.push(previousIndex);
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}
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});
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result.push(currentType);
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});
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return result.filter(function (type, index) {
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return exclude.indexOf(index) === -1;
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});
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}
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function compileMap(/* lists... */) {
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var result = {
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scalar: {},
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sequence: {},
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mapping: {},
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fallback: {}
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}, index, length;
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function collectType(type) {
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result[type.kind][type.tag] = result['fallback'][type.tag] = type;
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}
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for (index = 0, length = arguments.length; index < length; index += 1) {
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arguments[index].forEach(collectType);
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}
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return result;
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}
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function Schema(definition) {
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this.include = definition.include || [];
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this.implicit = definition.implicit || [];
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this.explicit = definition.explicit || [];
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this.implicit.forEach(function (type) {
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if (type.loadKind && type.loadKind !== 'scalar') {
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throw new YAMLException('There is a non-scalar type in the implicit list of a schema. Implicit resolving of such types is not supported.');
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}
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});
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this.compiledImplicit = compileList(this, 'implicit', []);
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this.compiledExplicit = compileList(this, 'explicit', []);
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this.compiledTypeMap = compileMap(this.compiledImplicit, this.compiledExplicit);
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}
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Schema.DEFAULT = null;
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Schema.create = function createSchema() {
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var schemas, types;
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switch (arguments.length) {
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case 1:
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schemas = Schema.DEFAULT;
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types = arguments[0];
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break;
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case 2:
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schemas = arguments[0];
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types = arguments[1];
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break;
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default:
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throw new YAMLException('Wrong number of arguments for Schema.create function');
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}
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schemas = common.toArray(schemas);
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types = common.toArray(types);
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if (!schemas.every(function (schema) { return schema instanceof Schema; })) {
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throw new YAMLException('Specified list of super schemas (or a single Schema object) contains a non-Schema object.');
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}
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if (!types.every(function (type) { return type instanceof Type; })) {
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throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.');
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}
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return new Schema({
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include: schemas,
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explicit: types
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});
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};
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module.exports = Schema;
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