Method genJNIFuncBody

bind/genjava.go:1186–1242

(o *types.Func, sName string, jm *java.Func, isjava bool)

}

func (g *JavaGen) genJNIFuncBody(o *types.Func, sName string, jm *java.Func, isjava bool) {
	sig := o.Type().(*types.Signature)
	res := sig.Results()
	if sName != "" {
		g.Printf("int32_t o = go_seq_to_refnum_go(env, __this__);\n")
	}
	params := sig.Params()
	first := 0
	if isjava && params.Len() > 0 && params.At(0).Name() == "this" {
		// Start after the implicit this argument.
		first = 1
		g.Printf("int32_t _%s = go_seq_to_refnum(env, __this__);\n", g.paramName(params, 0))
	}
	for i := first; i < params.Len(); i++ {
		name := g.paramName(params, i)
		g.genJavaToC(name, params.At(i).Type(), modeTransient)
	}
	resPrefix := ""
	if res.Len() > 0 {
		if res.Len() == 1 {
			g.Printf("%s r0 = ", g.cgoType(res.At(0).Type()))
		} else {
			resPrefix = "res."
			g.Printf("struct proxy%s_%s_%s_return res = ", g.pkgPrefix, sName, o.Name())
		}
	}
	g.Printf("proxy%s_%s_%s(", g.pkgPrefix, sName, o.Name())
	if sName != "" {
		g.Printf("o")
	}
	// Pass all arguments, including the implicit this argument.
	for i := 0; i < params.Len(); i++ {
		if i > 0 || sName != "" {
			g.Printf(", ")
		}
		g.Printf("_%s", g.paramName(params, i))
	}
	g.Printf(");\n")
	for i := first; i < params.Len(); i++ {
		g.genRelease(g.paramName(params, i), params.At(i).Type(), modeTransient)
	}
	for i := 0; i < res.Len(); i++ {
		tn := fmt.Sprintf("_r%d", i)
		t := res.At(i).Type()
		g.genCToJava(tn, fmt.Sprintf("%sr%d", resPrefix, i), t, modeRetained)
	}
	// Go backwards so that any exception is thrown before
	// the return.
	for i := res.Len() - 1; i >= 0; i-- {
		t := res.At(i).Type()
		if !isErrorType(t) {
			g.Printf("return _r%d;\n", i)
		} else {
			g.Printf("go_seq_maybe_throw_exception(env, _r%d);\n", i)
		}
	}
}