Bug 155493 [Deploy] Pictures and chart pictures are lost when preview on Weblogic Server using WAR deploy
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
* 
	 * @param file
	 * @return
	 */
	protected static String createAbsolutePath( String filePath )
	{
		if ( isRelativePath( filePath ) )
		{
			return documentFolder + File.separator + filePath;
		}
		return filePath;
	}
	/**
	 * If set isDocumentFolderAccessOnly as true, check the file if exist in
	 * document folder.
	 * 
	 * @param filePath
	 * @return boolean
	 */
	public static boolean isValidFilePath( String filePath )
	{
		assert filePath != null;
		if ( isDocumentFolderAccessOnly )
		{
			String absolutePath = new File( filePath ).getAbsolutePath( );
			String docFolderPath = new File( documentFolder ).getAbsolutePath( );
			
			if ( isWindowsPlatform( ) )
			{
				absolutePath = absolutePath.toLowerCase( );