Bug 214204 Only document content in document folder should be removed.[0601]
Description: Only document related content in document folder should be removed. Build number:2.3.0.v20080103 Steps to reproduce: 1. Deploy BIRT. 2. Edit web.xml to set BIRT_VIEWER_DOCUMENT_FOLDER to your local path and there are content inside the path. 3. Start server and click View Example to preview sample report. Expected result: Only content created by viewer should be removed in specified document folder. Actual result: All contents are deleted despite whether they are related with BIRT. Error log:n/a
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
* If set isWorkingFolderAccessOnly as true, check the file if exist in
	 * working folder.
	 * 
	 * @param filePath
	 * @return boolean
	 */
	public static boolean isValidFilePath( String filePath )
	{
		if ( filePath == null )
			return false;
		if ( isWorkingFolderAccessOnly )
		{
			File docFile = new File( filePath );
			if ( !docFile.isAbsolute( ) )
			{
				if ( filePath.indexOf( ".." ) != -1 ) 
					return false;
				return true;
			}
			File docFolder = new File( workingFolder );
			if ( docFolder.isAbsolute( ) )
			{
				String absolutePath = docFile.getAbsolutePath( );
				String docFolderPath = docFolder.getAbsolutePath( );
				
				if ( isWindowsPlatform( ) )
				{
					absolutePath = absolutePath.toLowerCase( );
					docFolderPath = docFolderPath.toLowerCase( );
				}