From: Alexis Laferrière <alexis.laf@xymus.net>
Date: Tue, 26 Feb 2019 15:18:03 +0000 (-0500)
Subject: Java FFI: fix a few warnings and improve doc
X-Git-Url: http://nitlanguage.org

Java FFI: fix a few warnings and improve doc

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
---

diff --git a/src/c_tools.nit b/src/c_tools.nit
index 1783c8e..61c1f9c 100644
--- a/src/c_tools.nit
+++ b/src/c_tools.nit
@@ -119,6 +119,7 @@ class ExternFile
 
 	fun compiles_to_o_file: Bool do return false
 
+	# Is `self` a Java file to include in the JAR archive?
 	fun add_to_jar: Bool do return false
 
 	# Additional libraries needed for the compilation
diff --git a/src/compiler/compiler_ffi/light.nit b/src/compiler/compiler_ffi/light.nit
index 4adbf05..ce0f71b 100644
--- a/src/compiler/compiler_ffi/light.nit
+++ b/src/compiler/compiler_ffi/light.nit
@@ -29,7 +29,7 @@ redef class MModule
 		return v.compiler.modelbuilder.mmodule2node(self)
 	end
 
-	redef fun finalize_ffi(compiler: AbstractCompiler)
+	redef fun finalize_ffi(compiler)
 	do
 		if not uses_ffi then return
 
diff --git a/src/ffi/java.nit b/src/ffi/java.nit
index 0dd65be..a222885 100644
--- a/src/ffi/java.nit
+++ b/src/ffi/java.nit
@@ -165,6 +165,9 @@ class JavaLanguage
 
 	redef fun compile_to_files(mmodule, compdir)
 	do
+		var ffi_ccu = ffi_ccu
+		assert ffi_ccu != null
+
 		# Make sure we have a .java file
 		mmodule.ensure_java_files
 
@@ -172,7 +175,7 @@ class JavaLanguage
 		mmodule.insert_compiler_options
 
 		# Enable linking C callbacks to java native methods
-		mmodule.ensure_linking_callback_methods(ffi_ccu.as(not null))
+		mmodule.ensure_linking_callback_methods(ffi_ccu)
 
 		# Java implementation code
 		var java_file = mmodule.java_file
@@ -343,7 +346,7 @@ class JavaClassTemplate
 	fun write_to_files(compdir: String): ExternFile
 	do
 		var filename = "{java_class_name}.java"
-		var filepath = "{compdir}/{filename}"
+		var filepath = compdir/filename
 
 		write_to_file filepath