1 files changed, 45 insertions, 0 deletions
diff --git a/java/com/google/devtools/build/android/desugar/CorePackageRenamer.java b/java/com/google/devtools/build/android/desugar/CorePackageRenamer.java
new file mode 100644
index 0000000..5f1dc2e
--- /dev/null
+++ b/java/com/google/devtools/build/android/desugar/CorePackageRenamer.java
@@ -0,0 +1,45 @@
+// Copyright 2018 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;
+
+import org.objectweb.asm.ClassVisitor;
+import org.objectweb.asm.commons.ClassRemapper;
+import org.objectweb.asm.commons.Remapper;
+
+/**
+ * A visitor that renames packages so configured using {@link CoreLibrarySupport}..
+ */
+class CorePackageRenamer extends ClassRemapper {
+
+  public CorePackageRenamer(ClassVisitor cv, CoreLibrarySupport support) {
+    super(cv, new CorePackageRemapper(support));
+  }
+
+  private static final class CorePackageRemapper extends Remapper {
+    private final CoreLibrarySupport support;
+
+    private CorePackageRemapper(CoreLibrarySupport support) {
+      this.support = support;
+    }
+
+    public boolean isRenamed(String owner) {
+      return support.isRenamedCoreLibrary(owner);
+    }
+
+    @Override
+    public String map(String typeName) {
+      return isRenamed(typeName) ? support.renameCoreLibrary(typeName) : typeName;
+    }
+  }
+}