{"id":22220959,"url":"https://github.com/nokia/cppjni","last_synced_at":"2025-06-11T06:05:45.530Z","repository":{"id":152002170,"uuid":"106678148","full_name":"nokia/cppJNI","owner":"nokia","description":"A C++-Java communication framework, which aim to simplify usage of Java code in C++ code.","archived":false,"fork":false,"pushed_at":"2020-08-03T15:10:13.000Z","size":103,"stargazers_count":15,"open_issues_count":5,"forks_count":6,"subscribers_count":4,"default_branch":"master","last_synced_at":"2025-06-11T06:04:24.274Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"C++","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"bsd-3-clause","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/nokia.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null}},"created_at":"2017-10-12T10:22:34.000Z","updated_at":"2024-01-11T18:00:48.000Z","dependencies_parsed_at":null,"dependency_job_id":"adc223cc-2866-45bc-8af9-b7fdf58f2a85","html_url":"https://github.com/nokia/cppJNI","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/nokia%2FcppJNI","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/nokia%2FcppJNI/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/nokia%2FcppJNI/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/nokia%2FcppJNI/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/nokia","download_url":"https://codeload.github.com/nokia/cppJNI/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/nokia%2FcppJNI/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":259211828,"owners_count":22822378,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-12-02T23:11:10.010Z","updated_at":"2025-06-11T06:05:45.524Z","avatar_url":"https://github.com/nokia.png","language":"C++","funding_links":[],"categories":[],"sub_categories":[],"readme":"cppJNI\n=======\nJava Native Interface (JNI) framework wrapper, which uses new C++ features in order to add type safety.\n\nRequirements\n--------\n * Boost 1.61 or higher (http://www.boost.org)\n * C++14 compatible compiler (clang \u003e= 3.8, gcc \u003e= 6.0)\n * google test for UT (\u003e= 1.8)\n\nQuick Start\n--------\nWith below silly Java class:\n```Java\npackage jni.test;\n\npublic class JNITest {\n    private int privatePrimitiveField;\n    private String privateObjectField;\n    \n    public JNITest(int primitiveParam, String objectParam) {\n        this.privatePrimitiveField = primitiveParam;\n        this.privateObjectField = objectParam;\n    }\n    \n    public int getPrimitiveField() {\n        return privatePrimitiveField;\n    }\n    \n    public String getStringField() {\n        return privateObjectField;\n    }\n}\n```\n\nGet back to C++ and prepare your Java class description:\n```C++\n#include \u003cjni/method_signature.hpp\u003e\n\n//class description is a template that must derive it's sole template parameter\ntemplate\u003ctypename T\u003e\nstruct MyJNIClass: T\n{\n    //path to your class package\n    using class_path_t = typestring_is(\"jni/test/MyJNIClass\");\n\n    //here you create constructor signature: it returns object of your class, obviously, and takes one integer and string in turn\n    MAKE_JAVA_CONSTRUCTORS(jni::types::Object\u003c::MyJNIClass\u003e(jni::types::Int, jni::types::String))\n    \n    //similarly you can declare methods\n    MAKE_JAVA_METHOD(getPrimitiveField, jni::types::Method\u003cjni::types::Int()\u003e)\n    MAKE_JAVA_METHOD(getStringField, jni::types::Method\u003cjni::types::String()\u003e)\n};\n```\n\nCreate JVM:\n```C++\n#include \u003cvirtual_machine.hpp\u003e\n...\njni::VirtualMachine vm({\"-Djava.class.path=path-to-your-jar-file\"});\n```\n\nCreate some classes and work with them:\n```C++\n...\nauto myClass = vm.loadClass\u003cMyJNIClass\u003e();\n\nauto javaObject = myClass.Construct(5, \"123ads\");\ncout \u003c\u003c javaObject.getPrimitiveField() \u003c\u003c \" '\" \u003c\u003c javaObject.getStringField() \u003c\u003c \"'\" \u003c\u003c endl;\n...\n```\nIt can't be simpler!\n\nTODO:\n--------\n    * registering of native methods\n    * Java monitors support\n    * arrays support\n    * class field access\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnokia%2Fcppjni","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fnokia%2Fcppjni","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnokia%2Fcppjni/lists"}