cql-antlr-parser/lib/CqlAntlr.js

Antlr Parsing of CQL in typescript

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const antlr4ts_1 = require("antlr4ts");
const cqlLexer_1 = require("./generated/cqlLexer");
const cqlParser_1 = require("./generated/cqlParser");
const CqlAntlrListener_1 = __importDefault(require("./CqlAntlrListener"));
const tree_1 = require("antlr4ts/tree");
class CqlAntlr {
    constructor(cql) {
        this.cql = cql;
    }
    parse() {
        const tree = this.buildTree();
        const result = CqlAntlr.buildCqlResult();
        const listener = new CqlAntlrListener_1.default(result);
        tree_1.ParseTreeWalker.DEFAULT.walk(listener, tree);
        return result;
    }
    static buildCqlResult() {
        const result = {};
        result.includes = [];
        result.codeSystems = [];
        result.valueSets = [];
        result.codes = [];
        return result;
    }
    buildTree() {
        const charStream = antlr4ts_1.CharStreams.fromString(this.cql);
        const lexer = new cqlLexer_1.cqlLexer(charStream);
        const tokenStream = new antlr4ts_1.CommonTokenStream(lexer);
        const parser = new cqlParser_1.cqlParser(tokenStream);
        return parser.library();
    }
}
exports.default = CqlAntlr;