diff -r fa7a3cc6effd -r 6d08f4a05d93 imgtools/romtools/rofsbuild/src/cache/cachevalidator.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imgtools/romtools/rofsbuild/src/cache/cachevalidator.cpp	Fri Jun 25 18:11:34 2010 +0800
@@ -0,0 +1,107 @@
+/*
+* Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: 
+*
+*/
+
+#include <new>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string>
+#include <cstring>
+#include <time.h>
+#include <map>
+#include <iostream>
+#include <fstream>
+#include <filesystem.hpp>
+#include <thread/mutex.hpp>
+
+#include "cache/cacheexception.hpp"
+#include "cache/cacheentry.hpp"
+#include "cache/cache.hpp"
+#include "cache/cachevalidator.hpp"
+
+using namespace std ;
+CacheValidator* CacheValidator::Only = (CacheValidator*)0;
+
+
+CacheValidator* CacheValidator::GetInstance(void) throw (CacheException)
+{
+	if(! CacheValidator::Only)
+	{
+		CacheValidator::Only = new (nothrow) CacheValidator();
+		if(! CacheValidator::Only)
+			throw CacheException(CacheException::RESOURCE_ALLOCATION_FAILURE);
+	}
+
+	return CacheValidator::Only;
+}
+
+
+CacheEntry* CacheValidator::Validate(const char* OriginalFilename, int CurrentCompressionID)
+{
+	if(! OriginalFilename)
+		return (CacheEntry*)0;
+
+	//an executable will be validated if its creation time does not altered and the compression method is not different against previous image build used.
+	CacheEntry* entryref = Cache::GetInstance()->GetEntryList(OriginalFilename);
+	if(! entryref)
+	{
+		return (CacheEntry*)0;
+	}
+	while(entryref)
+	{
+		boost::filesystem::path originalfile(OriginalFilename);
+		time_t originalcreationtime = last_write_time(originalfile);
+		string creationtime(ctime(&originalcreationtime));
+		size_t newlinepos = creationtime.find("\n");
+		while(newlinepos != string::npos)
+		{
+			creationtime.erase(newlinepos, 1);
+			newlinepos = creationtime.find(("\n"));
+		}
+		if((creationtime.compare(entryref->GetOriginalFileCreateTime())== 0) || (atoi(entryref->GetCachedFileCompressionID())==CurrentCompressionID))
+		{
+			boost::filesystem::path cachedfile(entryref->GetCachedFilename());
+			string filename = cachedfile.file_string(); 
+			ifstream filecontentreader(filename.c_str(), ios_base::in | ios_base::binary);
+			if(! filecontentreader.is_open()){
+				cerr << "Cannot open cached file " << filename << endl ;
+				return NULL;
+			}
+			filecontentreader.seekg(0, ios_base::end);
+			int contentlength = filecontentreader.tellg();
+			char* bufferref = new char[contentlength + 1];
+			filecontentreader.seekg(0, ios_base::beg);
+			filecontentreader.read(bufferref, contentlength);
+			bufferref[contentlength] = 0 ;
+			entryref->SetCachedFileBuffer(bufferref, contentlength);
+			delete []bufferref;
+
+			cout << "Using cached" <<  OriginalFilename << endl ;
+
+			return entryref;
+		}
+
+		entryref = entryref->GetNextEntry();
+	}
+
+	return (CacheEntry*)0;
+}
+
+
+CacheValidator::CacheValidator(void)
+{
+	return;
+}