BCopyEngine: Add base class BEntryOperationEngineBase

It contains a helper class Entry, which allows to generalize the
BCopyEngine::CopyEntry() parameters.

headers/private/storage/EntryOperationEngineBase.h

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2013, Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Ingo Weinhold <[email protected]>
+ */
+#ifndef _ENTRY_OPERATION_ENGINE_BASE_H
+#define _ENTRY_OPERATION_ENGINE_BASE_H
+
+
+#include <String.h>
+
+
+class BDirectory;
+class BEntry;
+class BPath;
+
+struct entry_ref;
+
+
+namespace BPrivate {
+
+
+class BEntryOperationEngineBase {
+public:
+			class Entry;
+};
+
+
+class BEntryOperationEngineBase::Entry {
+public:
+								Entry(const char* path);
+								Entry(const BDirectory& directory,
+									const char* path = NULL);
+								Entry(const BEntry& entry);
+								Entry(const entry_ref& entryRef);
+								~Entry();
+
+			status_t			GetPath(BPath& buffer, const char*& _path)
+									const;
+			BString				Path() const;
+
+private:
+			const BDirectory*	fDirectory;
+			const char*			fPath;
+			const BEntry*		fEntry;
+			const entry_ref*	fEntryRef;
+};
+
+
+} // namespace BPrivate
+
+
+#endif	// _ENTRY_OPERATION_ENGINE_BASE_H