scjson Rust Crate

This directory contains the Rust implementation of scjson. It offers a command line tool and supporting library to convert between .scxml and .scjson files and to validate documents.

For details on how SCXML elements are inferred during conversion see INFERENCE.md.

Installation

cargo install scjson

You can also build from this repository:

cd rust && cargo build --release

Source Code - Multi-Language Support

[https://github.com/SoftOboros/scjson/]

• csharp
• go
• java
• javascript / typescript
• lua
• python
• ruby
• rust
• swift

Command Line Usage

scjson json path/to/machine.scxml
scjson xml path/to/machine.scjson
scjson validate path/to/dir -r

Known Issues

None at this time.

Operational conformance testing is performed via uber_test.py

/py# python uber_test.py -l javascript 2>&1 | tee test.log

Note: uber_test.py applies all scxml files in Zhornyak's ScxmlEditor-Tutorial which provides a robest set of scxml test vectors useful for standard compliance verification. This is the only file in the test suite which fails to verify round-trip.

Enums

Each enumeration represents a restricted string set used by SCXML. The values shown below mirror those defined in the SCJSON schema.

• AssignTypeDatatypeProps – how the <assign> element manipulates the datamodel. Values: replacechildren, firstchild, lastchild, previoussibling, nextsibling, replace, delete, addattribute.
• BindingDatatypeProps – determines if datamodel variables are bound early or late during execution.
• BooleanDatatypeProps – boolean attribute values true or false.
• ExmodeDatatypeProps – processor execution mode, either lax or strict.
• HistoryTypeDatatypeProps – type of <history> state: shallow or deep.
• TransitionTypeDatatypeProps – whether a <transition> is internal or external.

Common Types

Several generated classes share generic helper fields:

• other_attributes: Record<str, str> capturing additional XML attributes from foreign namespaces.

• other_element: list[object] allowing untyped child nodes from other namespaces to be preserved.

• content: list[object] used when elements permit mixed or wildcard content.

Document / Object Types

• AssignProps AssignArray – update a datamodel location with an expression or value.

• CancelProps CancelArray – cancel a pending <send> operation.

• ContentProps ContentArray – inline payload used by <send> and <invoke>.

• DataProps DataArray – represents a single datamodel variable.

• DatamodelProps DatamodelArray – container for one or more <data> elements.

• DonedataProps DonedataArray – payload returned when a <final> state is reached.

• ElseProps – fallback branch for <if> conditions.

• ElseifProps – conditional branch following an <if>.

• FinalProps FinalArray – marks a terminal state in the machine.

• FinalizeProps FinalizeArray – executed after an <invoke> completes.

• ForeachProps ForeachArray – iterate over items within executable content.

• HistoryProps HistoryArray – pseudostate remembering previous active children.

• IfProps IfArray – conditional execution block.

• InitialProps InitialArray – starting state within a compound state.

• InvokeProps InvokeArray – run an external process or machine.

• LogProps LogArray – diagnostic output statement.

• OnentryProps OnentryArray – actions performed when entering a state.

• OnexitProps OnexitArray – actions performed when leaving a state.

• ParallelProps ParallelArray – coordinates concurrent regions.

• ParamProps ParamArray – parameter passed to <invoke> or <send>.

• RaiseProps RaiseArray – raise an internal event.

• ScriptProps ScriptArray – inline executable script.

• ScxmlProps – root element of an SCJSON document.

• SendProps SendArray – dispatch an external event.

• StateProps StateArray – basic state node.

• TransitionProps TransitionArray – edge between states triggered by events.

Other Resources

github: [https://github.com/SoftOboros/scjson]

git clone https://github.com/SoftOboros/scjson.git

git clone git@github.com:SoftOboros/scjson.git

gh repo clone SoftOboros/scjson

npm: [https://www.npmjs.com/package/scjson]

npm install scjson

pypi: [https://pypi.org/project/scjson/]

pip install scjson

dockerhub: [https://hub.docker.com/r/iraa/scjson] (Full development environment for all supported languages)

docker pull iraa/scjson:latest

All source code in this directory is released under the BSD\u00A01-Clause license. See LICENSE and LEGAL.md for details.