1 files changed, 52 insertions, 1 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/ideinfo/AndroidStudioInfoFilesProvider.java b/src/main/java/com/google/devtools/build/lib/ideinfo/AndroidStudioInfoFilesProvider.java
index 5d935310d1..6c833d1762 100644
--- a/src/main/java/com/google/devtools/build/lib/ideinfo/AndroidStudioInfoFilesProvider.java
+++ b/src/main/java/com/google/devtools/build/lib/ideinfo/AndroidStudioInfoFilesProvider.java
@@ -18,6 +18,7 @@ import com.google.devtools.build.lib.actions.Artifact;
 import com.google.devtools.build.lib.analysis.TransitiveInfoProvider;
 import com.google.devtools.build.lib.cmdline.Label;
 import com.google.devtools.build.lib.collect.nestedset.NestedSet;
+import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
 import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
 import com.google.devtools.build.lib.rules.android.AndroidIdeInfoProvider;
 import com.google.devtools.build.lib.rules.android.AndroidIdeInfoProvider.SourceDirectory;
@@ -31,7 +32,57 @@ public final class AndroidStudioInfoFilesProvider implements TransitiveInfoProvi
   private final NestedSet<Label> transitiveDependencies;
   private final NestedSet<AndroidIdeInfoProvider.SourceDirectory> transitiveResources;
 
-  public AndroidStudioInfoFilesProvider(
+  /**
+   * Builder class for {@link AndroidStudioInfoFilesProvider}
+   */
+  public static class Builder {
+    private final NestedSetBuilder<Artifact> ideBuildFilesBuilder;
+    private final NestedSetBuilder<Label> transitiveDependenciesBuilder;
+    private NestedSetBuilder<AndroidIdeInfoProvider.SourceDirectory> transitiveResourcesBuilder;
+    private NestedSet<AndroidIdeInfoProvider.SourceDirectory> transitiveResources;
+
+    public Builder() {
+      ideBuildFilesBuilder = NestedSetBuilder.stableOrder();
+      transitiveDependenciesBuilder = NestedSetBuilder.stableOrder();
+      transitiveResourcesBuilder = NestedSetBuilder.stableOrder();
+      transitiveResources = null;
+    }
+
+    public NestedSetBuilder<Artifact> ideBuildFilesBuilder() {
+      return ideBuildFilesBuilder;
+    }
+
+    public NestedSetBuilder<Label> transitiveDependenciesBuilder() {
+      return transitiveDependenciesBuilder;
+    }
+
+    public NestedSetBuilder<SourceDirectory> transitiveResourcesBuilder() {
+      return transitiveResourcesBuilder;
+    }
+
+    /**
+     * Returns a set of transitive resources. {@link Builder#transitiveResourcesBuilder}
+     * is unusable after this operation.
+     */
+    public NestedSet<AndroidIdeInfoProvider.SourceDirectory> getTransitiveResources() {
+      if (transitiveResources != null) {
+        return transitiveResources;
+      }
+      transitiveResources = transitiveResourcesBuilder.build();
+      transitiveResourcesBuilder = null;
+      return transitiveResources;
+    }
+
+    public AndroidStudioInfoFilesProvider build() {
+      return new AndroidStudioInfoFilesProvider(
+          ideBuildFilesBuilder.build(),
+          transitiveDependenciesBuilder.build(),
+          getTransitiveResources()
+      );
+    }
+  }
+
+  private AndroidStudioInfoFilesProvider(
       NestedSet<Artifact> ideBuildFiles,
       NestedSet<Label> transitiveDependencies,
       NestedSet<SourceDirectory> transitiveResources) {