1 files changed, 81 insertions, 0 deletions
diff --git a/java/com/google/devtools/build/android/desugar/io/DirectoryInputFileProvider.java b/java/com/google/devtools/build/android/desugar/io/DirectoryInputFileProvider.java
new file mode 100644
index 0000000..c607b42
--- /dev/null
+++ b/java/com/google/devtools/build/android/desugar/io/DirectoryInputFileProvider.java
@@ -0,0 +1,81 @@
+// Copyright 2017 The Bazel Authors. 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.android.desugar.io;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOError;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.function.Consumer;
+import java.util.stream.Stream;
+import java.util.zip.ZipEntry;
+
+/** Input provider is a directory. */
+class DirectoryInputFileProvider implements InputFileProvider {
+
+  private final Path root;
+
+  public DirectoryInputFileProvider(Path root) {
+    this.root = root;
+  }
+
+  @Override
+  public String toString() {
+    return root.getFileName().toString();
+  }
+
+  @Override
+  public InputStream getInputStream(String filename) throws IOException {
+    return new FileInputStream(root.resolve(filename).toFile());
+  }
+
+  @Override
+  public ZipEntry getZipEntry(String filename) {
+    ZipEntry destEntry = new ZipEntry(filename);
+    destEntry.setTime(0L); // Use stable timestamp Jan 1 1980
+    return destEntry;
+  }
+
+  @Override
+  public void close() throws IOException {
+    // Nothing to close
+  }
+
+  @Override
+  public Iterator<String> iterator() {
+    final List<String> entries = new ArrayList<>();
+    try (Stream<Path> paths = Files.walk(root)) {
+      paths.forEach(
+          new Consumer<Path>() {
+            @Override
+            public void accept(Path t) {
+              if (Files.isRegularFile(t)) {
+                // Internally, we use '/' as a common package separator in filename to abstract
+                // that filename can comes from a zip or a directory.
+                entries.add(root.relativize(t).toString().replace(File.separatorChar, '/'));
+              }
+            }
+          });
+    } catch (IOException e) {
+      throw new IOError(e);
+    }
+    return entries.iterator();
+  }
+}