[Truffle] Use-case for getSupportedMimeTypes

jruby · Jan 25, 2016 · 0a53b78 · 0a53b78
1 parent ba1e729
commit 0a53b78
Showing 3 changed files with 46 additions and 3 deletions.
diff --git a/lib/ruby/truffle/truffle/truffle/execjs.rb b/lib/ruby/truffle/truffle/truffle/execjs.rb
@@ -65,9 +65,7 @@ def name
     end
 
     def available?
-      defined?(Truffle::Interop) && Truffle::Interop.eval(JS_MIME_TYPE, 'true')
-    rescue RubyTruffleError
-      false
+      Truffle::Interop.supported_mime_types.include?('application/javascript')
     end
 
   end

diff --git a/spec/truffle/specs/truffle/interop/supported_mime_types_spec.rb b/spec/truffle/specs/truffle/interop/supported_mime_types_spec.rb
@@ -0,0 +1,21 @@
+# Copyright (c) 2016 Oracle and/or its affiliates. All rights reserved. This
+# code is released under a tri EPL/GPL/LGPL license. You can use it,
+# redistribute it and/or modify it under the terms of the:
+# 
+# Eclipse Public License version 1.0
+# GNU General Public License version 2
+# GNU Lesser General Public License version 2.1
+
+require_relative '../../../../ruby/spec_helper'
+
+describe "Truffle::Interop.supported_mime_types" do
+
+  it "returns an Array" do
+    Truffle::Interop.supported_mime_types.should be_kind_of(Array)
+  end
+
+  it "includes application/x-ruby" do
+    Truffle::Interop.supported_mime_types.should include('application/x-ruby')
+  end
+
+end
diff --git a/truffle/src/main/java/org/jruby/truffle/nodes/core/TruffleInteropNodes.java b/truffle/src/main/java/org/jruby/truffle/nodes/core/TruffleInteropNodes.java
@@ -426,6 +426,30 @@ public Object importObject(DynamicObject name) {
 
     }
 
+    @CoreMethod(names = "supported_mime_types", isModuleFunction = true, needsSelf = false)
+    public abstract static class SupportedMimeTypesNode extends CoreMethodArrayArgumentsNode {
+
+        public SupportedMimeTypesNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        @TruffleBoundary
+        @Specialization
+        public DynamicObject supportedMimeTypes() {
+            final String[] supportedMimeTypes = getContext().getEnv().getSupportedMimeTypes();
+            final Object[] supportedMimeTypesTruffle = new Object[supportedMimeTypes.length];
+
+            for (int n = 0; n < supportedMimeTypes.length; n++) {
+                supportedMimeTypesTruffle[n] = Layouts.STRING.createString(
+                        getContext().getCoreLibrary().getStringFactory(),
+                        ByteList.create(supportedMimeTypes[n]), StringSupport.CR_UNKNOWN, null);
+            }
+
+            return Layouts.ARRAY.createArray(getContext().getCoreLibrary().getArrayFactory(), supportedMimeTypesTruffle, supportedMimeTypesTruffle.length);
+        }
+
+    }
+
     @CoreMethod(names = "eval", isModuleFunction = true, needsSelf = false, required = 2)
     @ImportStatic(StringCachingGuards.class)
     public abstract static class EvalNode extends CoreMethodArrayArgumentsNode {