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‎.github/workflows/deploy-release.yml‎

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name: Deploy Release
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on:
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push:
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tags:
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- '*'
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jobs:
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deploy:
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uses: ./.github/workflows/deploy.yml
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with:
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deploy-url: "https://s01.oss.sonatype.org/service/local/staging/deploy/maven2/"
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secrets:
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DEPLOY_USERNAME: ${{ secrets.OSSRH_USERNAME }}
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DEPLOY_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
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PGP_SECRET: ${{ secrets.MAVEN_CENTRAL_SECRET }}
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PGP_PASSPHRASE: ${{ secrets.MAVEN_CENTRAL_PASSPHRASE }}

‎.github/workflows/deploy-snapshot.yml‎

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name: Deploy Snapshot
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on:
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push:
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branches:
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- 'main'
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jobs:
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deploy:
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uses: ./.github/workflows/deploy.yml
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with:
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deploy-url: "https://repo.opencollab.dev/maven-snapshots/"
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secrets:
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DEPLOY_USERNAME: ${{ secrets.OPENCOLLAB_USERNAME }}
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DEPLOY_PASSWORD: ${{ secrets.OPENCOLLAB_PASSWORD }}
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PGP_SECRET: ${{ secrets.MAVEN_CENTRAL_SECRET }}
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PGP_PASSPHRASE: ${{ secrets.MAVEN_CENTRAL_PASSPHRASE }}

‎.github/workflows/deploy.yml‎

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on:
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workflow_call:
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inputs:
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deploy-url:
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description: 'The maven repository to deploy to'
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required: true
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type: string
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secrets:
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DEPLOY_USERNAME:
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required: true
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DEPLOY_PASSWORD:
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required: true
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PGP_SECRET:
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required: true
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PGP_PASSPHRASE:
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required: true
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jobs:
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publish:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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- uses: actions/setup-java@v4
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with:
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distribution: 'temurin'
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java-version: '17'
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- name: Validate Gradle Wrapper
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uses: gradle/actions/wrapper-validation@v4
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- name: Setup Gradle
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uses: gradle/actions/setup-gradle@v4
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with:
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gradle-version: wrapper
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- name: Publish
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run: ./gradlew publish
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env:
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MAVEN_DEPLOY_USERNAME: ${{ secrets.DEPLOY_USERNAME }}
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MAVEN_DEPLOY_PASSWORD: ${{ secrets.DEPLOY_PASSWORD }}
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PGP_SECRET: ${{ secrets.PGP_SECRET }}
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PGP_PASSPHRASE: ${{ secrets.PGP_PASSPHRASE }}
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MAVEN_DEPLOY_URL: ${{ inputs.deploy-url }}

‎.github/workflows/pull-request.yml‎

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name: Build PR
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on:
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pull_request:
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branches:
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- 'main'
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jobs:
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build:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v4
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- uses: actions/setup-java@v4
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with:
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distribution: 'temurin'
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java-version: '17'
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- name: Validate Gradle Wrapper
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uses: gradle/actions/wrapper-validation@v4
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- name: Setup Gradle
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uses: gradle/actions/setup-gradle@v4
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with:
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gradle-version: wrapper
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- name: Build
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run: ./gradlew build

‎.gitignore‎

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# Intellij IDEA
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.idea
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# Gradle
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.gradle
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build/*
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gradle.properties

‎LICENSE‎

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Apache License
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‎README.md‎

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# MoJava
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A fast [MoLang](https://bedrock.dev/docs/stable/Molang) parser, compiler, and runtime for Java.
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MoLang is Minecraft Bedrock's expression language for animations, particles, and render controllers.
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MoJava parses MoLang source, **compiles it to JVM bytecode**, and evaluates the result — so a script
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that's compiled once and reused runs at hand-written-Java speed.
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> Requires **Java 17+**.
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## Why MoJava
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- **Compiles to JVM bytecode** (via ASM) into a GC-reclaimable hidden class — no tree-walking at eval time.
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- **Allocation-free numeric evaluation.** Numeric scripts evaluate straight to a primitive `double`
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with zero heap allocation per call (`executeDouble`), so there's no per-frame GC pressure.
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- **`math.*` inlined** to `java.lang.Math`, repeated variable reads cached, and `variable`/`temp`
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reads resolved to slot indices instead of map lookups.
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## Getting started
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```gradle
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repositories {
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maven("https://repo.opencollab.dev/maven-releases/")
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}
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dependencies {
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implementation("org.cloudburstmc:mojava:0.0.1")
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}
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```
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```java
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import org.cloudburstmc.mojava.MoJava;
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import org.cloudburstmc.mojava.compiler.MoScript;
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import org.cloudburstmc.mojava.runtime.MoRuntime;
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import org.cloudburstmc.mojava.runtime.value.DoubleValue;
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MoRuntime runtime = MoJava.createRuntime();
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// Seed a variable and register a query the script can read
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runtime.getEnvironment().variable.setDirectly("speed", new DoubleValue(1.5));
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runtime.getEnvironment().query.addDoubleFunction("life_time", params -> 0.5);
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// Compile once...
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MoScript script = runtime.compile(MoJava.parse("math.sin(q.life_time * 90) * v.speed"));
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// ...evaluate as often as you like (allocation-free for numeric scripts)
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double value = runtime.executeDouble(script);
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```
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For a one-off evaluation, skip the caching: `runtime.execute(MoJava.parse(code))` returns a `MoValue`
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(call `.asDouble()` or `.asString()` on it).
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## Variables and queries
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`v.`/`variable.`, `t.`/`temp.`, `q.`/`query.`, and `c.`/`context.` resolve against the runtime's
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environment:
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```java
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var env = runtime.getEnvironment();
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// Variables (read/write from scripts; persist across evals)
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env.variable.setDirectly("health", new DoubleValue(20));
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// Queries — host callbacks the script can read or call
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env.query.addFunction("entity_name", params -> new StringValue("creeper")); // any MoValue
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env.query.addDoubleFunction("distance", params -> 12.5); // numeric fast path
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```
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Register numeric queries with **`addDoubleFunction`**: it returns a primitive `double`, skipping the
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`Double`/`DoubleValue` boxing a generic `Function` incurs, so query reads on the numeric path stay
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allocation-free. Use `addFunction` for queries that return strings or structs.
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## Building
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```bash
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./gradlew build # compile + run tests
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./gradlew jmh # run the benchmark suite (cross-engine + per-workload)
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```
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## License
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Licensed under the [Apache License 2.0](LICENSE).

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