Method genMethodInterfaceProxy

bind/genjava.go:1255–1312

(oName string, m *types.Func)

}

func (g *JavaGen) genMethodInterfaceProxy(oName string, m *types.Func) {
	if !g.isSigSupported(m.Type()) {
		g.Printf("// skipped method %s with unsupported parameter or return types\n\n", oName)
		return
	}
	sig := m.Type().(*types.Signature)
	params := sig.Params()
	res := sig.Results()
	g.genInterfaceMethodSignature(m, oName, false, g.paramName)
	g.Indent()
	g.Printf("JNIEnv *env = go_seq_push_local_frame(%d);\n", params.Len())
	g.Printf("jobject o = go_seq_from_refnum(env, refnum, proxy_class_%s_%s, proxy_class_%s_%s_cons);\n", g.pkgPrefix, oName, g.pkgPrefix, oName)
	for i := 0; i < params.Len(); i++ {
		pn := g.paramName(params, i)
		g.genCToJava("_"+pn, pn, params.At(i).Type(), modeTransient)
	}
	if res.Len() > 0 && !isErrorType(res.At(0).Type()) {
		t := res.At(0).Type()
		g.Printf("%s res = (*env)->Call%sMethod(env, o, ", g.jniType(t), g.jniCallType(t))
	} else {
		g.Printf("(*env)->CallVoidMethod(env, o, ")
	}
	g.Printf("mid_%s_%s", oName, m.Name())
	for i := 0; i < params.Len(); i++ {
		g.Printf(", _%s", g.paramName(params, i))
	}
	g.Printf(");\n")
	var retName string
	if res.Len() > 0 {
		t := res.At(0).Type()
		if res.Len() == 2 || isErrorType(t) {
			g.Printf("jobject exc = go_seq_get_exception(env);\n")
			errType := types.Universe.Lookup("error").Type()
			g.genJavaToC("exc", errType, modeRetained)
			retName = "_exc"
		}
		if !isErrorType(t) {
			if res.Len() == 2 {
				g.genCRetClear("res", t, "exc")
			}
			g.genJavaToC("res", t, modeRetained)
			retName = "_res"
		}

		if res.Len() > 1 {
			g.Printf("cproxy%s_%s_%s_return sres = {\n", g.pkgPrefix, oName, m.Name())
			g.Printf("	_res, _exc\n")
			g.Printf("};\n")
			retName = "sres"
		}
	}
	g.Printf("go_seq_pop_local_frame(env);\n")
	if retName != "" {
		g.Printf("return %s;\n", retName)
	}
	g.Outdent()
	g.Printf("}\n\n")
}