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@apexdevtools/apex-parser

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@apexdevtools/apex-parser

Javascript parser for Salesforce Apex Language


Version published
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945
decreased by-3.87%
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1
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Changelog

Source

4.1.0 - 2024-05-12

  • Allow WITH USER_MODE or SYSTEM_MODE on SOSL queries

Readme

Source

apex-parser

Parser for Salesforce Apex (including Triggers & inline SOQL/SOQL). This is based on an ANTLR4 grammar, see antlr/ApexParser.g4.

There are two builds of the parser available, a NPM module for use with Node and a Maven package for use on JVMs.

These builds just contain the Parser & Lexer and provides no further support for analysing the generated parse trees beyond what is provided by ANTLR4.

As Apex & SOQL/SOQL are case-insenstive languages you need to use the provided CaseInsensitiveInputStream for the parser to function correctly. When parsing Apex, inline SOQL/SOSL is automtaically parsed, but you can also parse SOQL/SOQL directly. You can find some minimal examples in the test classes.

Example

To parse a class file (NPM version):

let lexer = new ApexLexer(new CaseInsensitiveInputStream("public class Hello {}"))
let tokens  = new CommonTokenStream(lexer);

let parser = new ApexParser(tokens)
let context = parser.compilationUnit()

The 'context' is a CompilationUnitContext object which is the root of the parsed representation of the class. You can access the parse tree via functions on it.

Unicode handling

Prior to 2.12.0 the use of ANTLRInputStream for reading data in CaseInsensitiveStream would result character positions being given for UTF-16. The switch to CharStream input in 2.12.0 for JVM and 2.14.0 for node results in character positions reflecting Unicode code points.

antlr4ts versions

The npm module uses antlr4ts 0.5.0-alpha.4, this was updated from 0.5.0-alpha.3 in the 2.9.1 version. You should make sure that if you are using a matching versions of this dependency if you use it directly. To avoid issues you can import 'CommonTokenStream' & 'ParseTreeWalker' from 'apex-parser' instead of from antlr4ts.

import { CommonTokenStream} from "apex-parser";
import { ParseTreeWalker } from "apex-parser";

SOSL FIND quoting

SOSL FIND uses ' as a quoting character when embedded in Apex, in the API braces are used:

Find {something} RETURNING Account

To parse the API format there is an alternative parser rule, soslLiteralAlt, that you can use instead of soslLiteral. See SOSLParserTest for some examples of how these differ.

Packages

Maven

<dependency>
    <groupId>io.github.apex-dev-tools</groupId>
    <artifactId>apex-parser</artifactId>
    <version>4.1.0</version>
</dependency>

NPM

"@apexdevtools/apex-parser": "^4.1.0"

Building

To build both distributions:

npm run build

Testing

Unit tests are executed during the respective package builds. The system tests require both packages to be built, as the js test also spawns the jar version. They use a collection of sample projects located in the apex-samples repository. Follow the README instructions in apex-samples to checkout the submodules. To run the tests:

# Set SAMPLES env var to samples repo location
export SAMPLES=<abs path to apex-samples>

# Exec test script
npm run test-samples

System test failures relating to the snapshots may highlight regressions. Though if an error is expected or the samples have changed, instead use npm run test-snapshot to update the snapshots, then commit the changes.

The tag version of apex-samples used by builds is set in the build file.

Source & Licenses

All the source code included uses a 3-clause BSD license. The only third-party component included is the Apex Antlr4 grammar originally from Tooling-force.com, although this version used is now markedly different from the original.

FAQs

Package last updated on 14 May 2024

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