1 files changed, 64 insertions, 0 deletions
diff --git a/java/com/google/devtools/build/android/desugar/io/ZipInputFileProvider.java b/java/com/google/devtools/build/android/desugar/io/ZipInputFileProvider.java
new file mode 100644
index 0000000..9bd7758
--- /dev/null
+++ b/java/com/google/devtools/build/android/desugar/io/ZipInputFileProvider.java
@@ -0,0 +1,64 @@
+// 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 com.google.common.base.Functions;
+import com.google.common.collect.Iterators;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Path;
+import java.util.Iterator;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+
+/** Input provider is a zip file. */
+class ZipInputFileProvider implements InputFileProvider {
+
+  private final Path root;
+
+  private final ZipFile zipFile;
+
+  public ZipInputFileProvider(Path root) throws IOException {
+    this.root = root;
+    this.zipFile = new ZipFile(root.toFile());
+  }
+
+  @Override
+  public void close() throws IOException {
+    zipFile.close();
+  }
+
+  @Override
+  public String toString() {
+    return root.getFileName().toString();
+  }
+
+  @Override
+  public ZipEntry getZipEntry(String filename) {
+    ZipEntry zipEntry = zipFile.getEntry(filename);
+    zipEntry.setCompressedSize(-1);
+    return zipEntry;
+  }
+
+  @Override
+  public InputStream getInputStream(String filename) throws IOException {
+    return zipFile.getInputStream(zipFile.getEntry(filename));
+  }
+
+  @Override
+  public Iterator<String> iterator() {
+    return Iterators.transform(
+        Iterators.forEnumeration(zipFile.entries()), Functions.toStringFunction());
+  }
+}