question: private T matchTokens ( String targetToken , String requestToken ) { int wildcardIndex = 0 ; if ( targetToken == null && requestToken == null ) { return exactMatch ; } if ( targetToken == null || requestToken == null ) { return noMatch ; } int beginTargetIndex = 0 ; int beginRequestIndex = 0 ; String substr = null ; int targetTokenLength = targetToken . length ( ) ; int requestTokenLength = requestToken . length ( ) ; if ( targetToken . indexOf ( oneLevelWildcard , beginTargetIndex ) != - 1 ) { while ( ( wildcardIndex = targetToken . indexOf ( oneLevelWildcard , beginTargetIndex ) ) != - 1 ) { if ( wildcardIndex > beginTargetIndex ) { substr = targetToken . substring ( beginTargetIndex , wildcardIndex ) ; if ( ( beginRequestIndex = requestToken . indexOf ( substr , beginRequestIndex ) ) == - 1 ) { return noMatch ; } beginTargetIndex = beginTargetIndex + substr . length ( ) + oneLevelWildcardLength ; beginRequestIndex = beginRequestIndex + substr . length ( ) ; } else { if ( wildcardIndex == beginTargetIndex ) { if ( targetTokenLength == oneLevelWildcardLength ) { return wildcardMatch ; } else { beginTargetIndex = beginTargetIndex + oneLevelWildcardLength ; continue ; } } } } if ( beginTargetIndex >= targetTokenLength ) { return wildcardMatch ; } String targetStr = targetToken . substring ( beginTargetIndex , targetTokenLength ) ; String remRequest = requestToken . substring ( beginRequestIndex , requestTokenLength ) ; int remRequestIndex = - 1 ; if ( ( remRequestIndex = remRequest . lastIndexOf ( targetStr , remRequest . length ( ) - 1 ) ) == - 1 ) { return noMatch ; } else { beginRequestIndex = beginRequestIndex + remRequestIndex ; if ( beginRequestIndex + targetStr . length ( ) >= requestTokenLength ) { return wildcardMatch ; } else { return noMatch ; } } } else { if ( targetToken . equals ( requestToken ) ) { return exactMatch ; } } return noMatch ; }
target:  matches individual request and target tokens. This method is used to compare tokens in one level wild card compare to compare tokens between delimiter boundaries.