diff -r 22486c9c7b15 -r 378360dbbdba imgtools/romtools/rofsbuild/inc/cache/cachevalidator.hpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imgtools/romtools/rofsbuild/inc/cache/cachevalidator.hpp	Wed Jun 30 11:35:58 2010 +0800
@@ -0,0 +1,44 @@
+/**
+ * @file cachevalidator.hpp
+ */
+
+
+#ifndef ROM_TOOLS_ROFSBUILD_CACHE_CACHEVALIDATOR_H_
+#define ROM_TOOLS_ROFSBUILD_CACHE_CACHEVALIDATOR_H_
+
+
+/**
+ * @class CacheValidator
+ * @brief Validate an existing cache entry.
+ */
+class CacheValidator
+{
+public:
+	/**
+	 * @fn CacheValidator* CacheValidator::GetInstance(void)
+	 * @brief Get singleton instance of class CacheValidator.
+	 * @return The singleton instance.
+	 * @exception CacheException Catch allocation failures.
+	 */
+	static CacheValidator* GetInstance(void) throw (CacheException);
+
+	/**
+	 * @fn CacheEntry* CacheValidator::Validate(const char* OriginalFilename, int CurrentCompressionID)
+	 * @brief Validate cached executable with original version.
+	 * @param OriginalFilename The filename of original executable.
+	 * @param CurrentCompressionID The ID of compression method used over current image build.
+	 * @return The entry for cached file or zero if the given executable file is invalidated.
+	 */
+	CacheEntry* Validate(const char* OriginalFilename, int CurrentCompressionID);
+protected:
+	static CacheValidator* Only;
+private:
+	CacheValidator(void);
+
+	CacheValidator(const CacheValidator&);
+
+	CacheValidator& operator = (const CacheValidator&);
+};
+
+
+#endif  /* defined ROM_TOOLS_ROFSBUILD_CACHE_CACHEVALIDATOR_H_ */