1 files changed, 53 insertions, 0 deletions
diff --git a/java/java-impl/src/com/intellij/compilerOutputIndex/api/fs/FileVisitorService.java b/java/java-impl/src/com/intellij/compilerOutputIndex/api/fs/FileVisitorService.java
new file mode 100644
index 000000000000..9a7f00be3dc3
--- /dev/null
+++ b/java/java-impl/src/com/intellij/compilerOutputIndex/api/fs/FileVisitorService.java
@@ -0,0 +1,53 @@
+package com.intellij.compilerOutputIndex.api.fs;
+
+import com.intellij.openapi.project.Project;
+import com.intellij.util.Consumer;
+
+import java.io.File;
+
+/**
+ * @author Dmitry Batkovich <dmitry.batkovich@jetbrains.com>
+ */
+public interface FileVisitorService {
+
+  interface Visitor {
+    void visit(File file);
+  }
+
+  void visit(final Consumer<File> visitor);
+
+  class ProjectClassFiles implements FileVisitorService {
+    private final Project myProject;
+
+    public ProjectClassFiles(final Project project) {
+      myProject = project;
+    }
+
+    @Override
+    public void visit(final Consumer<File> visitor) {
+      CompilerOutputFilesUtil.iterateProjectClassFiles(myProject, visitor);
+    }
+  }
+
+  class DirectoryClassFiles implements FileVisitorService {
+    private final File myDir;
+
+    public DirectoryClassFiles(final File dir) {
+      if (!dir.isDirectory()) {
+        throw new IllegalArgumentException();
+      }
+      myDir = dir;
+    }
+
+    @Override
+    public void visit(final Consumer<File> visitor) {
+      //noinspection ConstantConditions
+      for (final File file : myDir.listFiles()) {
+        if (file.getName().endsWith(CompilerOutputFilesUtil.CLASS_FILES_SUFFIX)) {
+          visitor.consume(file);
+        }
+      }
+    }
+  }
+}
+