1 files changed, 43 insertions, 0 deletions
diff --git a/src/java_tools/singlejar/java/com/google/devtools/build/singlejar/SimpleFileSystem.java b/src/java_tools/singlejar/java/com/google/devtools/build/singlejar/SimpleFileSystem.java
new file mode 100644
index 0000000000..844f12b714
--- /dev/null
+++ b/src/java_tools/singlejar/java/com/google/devtools/build/singlejar/SimpleFileSystem.java
@@ -0,0 +1,43 @@
+// Copyright 2014 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.devtools.build.singlejar;
+
+import com.google.devtools.build.singlejar.OptionFileExpander.OptionFileProvider;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+/**
+ * A simple virtual file system interface. It's much simpler than the Blaze
+ * virtual file system and only to be used inside this package.
+ */
+public interface SimpleFileSystem extends OptionFileProvider {
+
+  @Override
+  InputStream getInputStream(String filename) throws IOException;
+
+  /**
+   * Opens a file for output and returns an output stream. If a file of that
+   * name already exists, it is overwritten.
+   */
+  OutputStream getOutputStream(String filename) throws IOException;
+
+  /**
+   * Delete the file with the given name and return whether deleting it was
+   * successfull.
+   */
+  boolean delete(String filename);
+}
+\ No newline at end of file