pEpJNIAdapter/src/codegen/gen_cpp_Message.ysl2

include yslt.yml2
include yslt.yml2

tstylesheet {
    include ./textutils.ysl2
    include ./types_c.ysl2

    template "/namespace[@name='pEp']" {
        apply "struct", 0;
        document("../../build/marker/gen_cpp_Message.marker", "text") > ""
    }

    template "struct" {
        const "jname" call "CamelCase" with "text", "@name";

        document("../cxx/foundation_pEp_jniadapter_{$jname}.cc", "text") {
            ||
            #include <cassert>
            #include <pEp/mime.h>
            #include <pEp/pEpLog.hh>
            #include "jniutils.hh"
            #include "throw_pEp_exception.hh"
            #include "foundation_pEp_jniadapter_«$jname».h"

            using namespace std;

            namespace pEp {
            namespace JNIAdapter {
            static ::«@name» *«@name»_ptr(JNIEnv *env, jobject me) {
                jfieldID handle;
                handle = getFieldID(env, "foundation/pEp/jniadapter/«$jname»", "handle", "J");
                if(!handle) {
                    throw runtime_error("field not found: handle");
                }

                long handle_val = static_cast<long>(env->GetLongField(me, handle));
                if(!handle_val) {
                    throw runtime_error("invalid handle (0)");
                }

                return reinterpret_cast<::«@name» *>(handle_val);
            }

            };
            };

            extern "C" {

            using namespace pEp::JNIAdapter;

            JNIEXPORT jlong JNICALL Java_foundation_pEp_jniadapter_«$jname»_init(JNIEnv *env,
                    jobject obj)
            {
                pEpLog("called");
                ::«@name» * _obj = ::new_«@name»(PEP_dir_incoming);
                if (!_obj) {
                    outOfMemory(env);
                    return 0;
                }
                return reinterpret_cast<jlong>(_obj);
            }

            JNIEXPORT void JNICALL Java_foundation_pEp_jniadapter_«$jname»_release(JNIEnv *env,
                    jobject obj,
                    jlong value)
            {
                pEpLog("called");
                if (value) {
                    ::«@name» *_obj = reinterpret_cast<::«@name» *>(value);
                    ::free_«@name»(_obj);
                }
            }

            JNIEXPORT jlong JNICALL Java_foundation_pEp_jniadapter_«$jname»__1«$jname»(JNIEnv *env,
                    jobject msg,
                    jbyteArray mime_text)
            {
                pEpLog("called");
                char *_mime_text = to_string(env, mime_text);
                size_t _size = env->GetArrayLength(mime_text);

                ::«@name» *_msg = nullptr;
                PEP_STATUS status = mime_decode_«@name»(_mime_text, _size, &_msg, NULL);
                if (status) {
                    throw_pEp_Exception(env, status);
                }

                return reinterpret_cast<jlong>(_msg);
            }

            JNIEXPORT jbyteArray JNICALL Java_foundation_pEp_jniadapter_«$jname»__1encodeMIME(JNIEnv *env,
                    jobject obj)
            {
                pEpLog("called");
                «@name»* _obj = nullptr;
                try {
                    _obj = «@name»_ptr(env, obj);
                } catch(...) {
                    jclass ex = env->FindClass("java/lang/IllegalStateException");
                    assert(ex);
                    env->ThrowNew(ex, nullptr);
                    return static_cast<jbyteArray>(NULL);
                }

                char *mime_text = nullptr;
                PEP_STATUS status = ::mime_encode_«@name»(_obj, false, &mime_text, false);
                if (status) {
                    throw_pEp_Exception(env, status);
                }
                jbyteArray result = from_string(env, mime_text);
                free(mime_text);

                return result;
            }

            ||
            apply "*[name(.)!='enum']", 0, mode=entry {
                with "name", "@name";
                with "class" call "CamelCase" with "text", "@name";
            }
            ||
            } // extern "C"

            ||
        }
    }

    function "mangle" {
        param "type";
        param "name";
        param "classname" call "CamelCase" with "text", "../@name";

        > «concat('Java_foundation_pEp_jniadapter_', $classname, '__1', str:replace($name, '_', '_1'))»
    }

    template "*", mode=entry {
        param "name";
        param "class";
        const "ctype" call "toC" with "type", "name(.)";
        const "jname" call "CamelCase" with "text", "name(*[1])";
        const "cname" call "lcase" with "text", "name(*[1])";
        const "type", "name(.)";
        const "getname" call "mangle" {
            with "type", "$type";
            with "name", "concat('get', $jname)";
        }
        const "setname" call "mangle" {
            with "type", "$type";
            with "name", "concat('set', $jname)";
        }
        const "type_ret" call "jni_type" with "type", "name(.)";

        ||
        // CodeGen: Getter
        JNIEXPORT «$type_ret» JNICALL «$getname»(JNIEnv *env,
                jobject obj)
        {
            pEpLog("called");
            «$name»* _obj = nullptr;
            try {
                _obj = «$name»_ptr(env, obj);
            } catch(...) {
                jclass ex = env->FindClass("java/lang/IllegalStateException");
                assert(ex);
                env->ThrowNew(ex, nullptr);
                return static_cast<«$type_ret»>(NULL);
            }

        ||
        choose {
            when "../enum[@name=$type]"
                |> return _obj->«$cname»;
            otherwise
                |> return from_«$type»(env, _obj->«$cname»);
        }
        ||
        }
        // CodeGen: Setter
        JNIEXPORT void JNICALL «$setname»(JNIEnv *env,
                jobject obj,
                `call "jni_type" with "type", "name(.)"`
                value)
        {
            pEpLog("called");
            «$name»* _obj = nullptr;
            try {
                _obj = «$name»_ptr(env, obj);
            } catch(...) {
                jclass ex = env->FindClass("java/lang/IllegalStateException");
                assert(ex);
                env->ThrowNew(ex, nullptr);
                return;
            }
        ||
        choose {
            when "../enum[@name=$type]"
                |> _obj->«$cname» = static_cast<«$ctype»>(value);
            otherwise {
                choose {
                    when "$type = 'string'" {
                        |> free(_obj->«$cname»);
                    }
                    otherwise {
                        const "free" choose {
                            when "$ctype = 'pEp_identity'" > identity
                            when "contains($ctype, '_t')" value "substring-before($ctype, '_t')";
                            otherwise value "$ctype";
                        }

                        |> free_«$free»(_obj->«$cname»);
                    }
                }
                |> if(value) {
                choose {
                    when "$type = 'string'" {
                        |>> _obj->«$cname» = to_«$type»(env, value);
                    }
                    otherwise {
                        |>> _obj->«$cname» = to_«$type»(env, value);
                    }
                }
                |> } else {
                |>     _obj->«$cname» = NULL;
                |> }
            }
        }
        ||
        }

        ||
    }
}