duktape-java - A Java binding for Duktape

This projects aims to expose the complete Duktape API to Java. This is done by generating the method stubs according to the API before the needed C code is generated by javacpp.

Features

• Used Duktape version: 1.5.0
• Bindings for 248 out of 262 API functions (94.66% coverage)

Functions that still need bindings

• duk_push_error_object
• duk_error
• duk_decode_string
• duk_push_sprintf
• duk_log_va
• duk_push_vsprintf
• duk_log
• duk_debugger_attach
• duk_get_memory_functions
• duk_map_string
• duk_push_error_object_va
• duk_put_number_list
• duk_debugger_attach_custom
• duk_error_va

Example usage

import static org.duktape.duktapejava.Duktape.*;

public class Example {
    public static void main(String[] args) {
        duk_context ctx = duk_create_context();

        duk_push_global_object(ctx);
        duk_push_java_function(ctx, (context) -> {
            System.out.println("Hello from Java!");
            return 0;
        }, 0);
        duk_put_prop_string(ctx, -2, "javaFunction");
        duk_pop(ctx);

        duk_eval_string(ctx, "javaFunction();");

        duk_destroy_heap(ctx);
    }
}

Known issues

Building

To run the Example the project must be built completely to generate the needed Java files.

Preperations

This step will be automated at some point.
Make sure to use the correct Duktape Version (1.5.0) for the files you copy.

• Copy the contents of website/api from the Duktape Repoistory into duktape-api/
• Copy duk_config.h, duktape.h and duktape.c into src/main/c

Compilation

The native binding is currently only tested under Linux and the build process is not completely finished. But with some tweaks to the build.gradle file it should compile on other platforms.

• ./gradlew build or gradlew.bat build

Authors

• Rene Hollander <rene@rene8888.at>

License

The MIT License (MIT)

Copyright (c) 2016 Rene Hollander

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.