# antlr4-javascript-sparql

**Repository Path**: xulx_code/antlr4-javascript-sparql

## Basic Information

- **Project Name**: antlr4-javascript-sparql
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-02-22
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

antlr4-javascript-sparql
========================

An UMD module which expose sparql parser lexer listener and visitor 

### Info 

This is a UMD module for javascript sparql parser classes 
Parser classes where generated from gramar files using antlr4 framework:    

```
java -Xmx500M -cp "antlr-4.5-complete.jar:$CLASSPATH" org.antlr.v4.Tool -Dlanguage=JavaScript sparql/SparqlLexer.g4 -o lib
mv lib/sparql/SparqlLexer.tokens lib/
java -Xmx500M -cp "antlr-4.5-complete.jar:$CLASSPATH" org.antlr.v4.Tool -Dlanguage=JavaScript sparql/SparqlParser.g4 -visitor -o lib
```
Then a few modyfications were made to generated classes.

 * each class was **wrapped in a function** - to be able to pass dependencies 
 * in SparqlLexer - **atn** and **decisionToFDA** where moved inside the constructor
 * in SparqlParser - **atn** **decisionToFDA** and  **sharedContextCache** where moved inside the constructor and  atn was directly assigned to this and the **Object.defineProperty** was commented out

### Useage

To build UMD module type:    
 
```    
npm install -g browserify
browserify  --ignore-missing main.js -o release/antlr4-sparql.js",
```
    
The result module is in **release/antlr4-sparql.js

To use with webpack define following shim antlr4-sparql.js  

```
var antlr4 = require('antlr4-base');
var sparqlLexer = require('node_modules/antlr4-javascript-sparql/lib/SparqlLexer.js');
var sparqlParser = require('node_modules/antlr4-javascript-sparql/lib/SparqlParser.js');
var sparqlParserListener = require('node_modules/antlr4-javascript-sparql/lib/SparqlParserListener');
var sparqlParserVisitor = require('node_modules/antlr4-javascript-sparql/lib/SparqlParserVisitor');
var listener = sparqlParserListener(antlr4);

module.exports = {
  SparqlLexer: sparqlLexer(antlr4),
  SparqlParser: sparqlParser(antlr4, listener),
  SparqlParserListener: listener,
  SparqlParserVisitor: sparqlParserVisitor(antlr4)
};
```