Re: matcher is failing
James McMahon <[email protected]>
| Newsgroups | gmane.comp.lang.groovy.user |
|---|---|
| Message-ID | <CAEqJCe0uO4brRYAPafG_R_q4OmsDfyu8OqiGQh6UGw4be3JxNA@mail.gmail.com> |
Thank you much, Spencer and Paul. This was very helpful and got me rolling again. I've got some re-work and cleanup to do, but will post my final working logic here. Cheers, Jim On Sun, Jul 9, 2023 at 7:58 PM Paul King <[email protected]> wrote: > Yes, Spencer's info is correct. This script gives an example for a date in > dd-mm-yy[yy] format: > > candidate = '14-06-2023' > matcher = candidate =~ /(?x) # enable whitespace and comments > ^ # start of line > (0?[1-9]|[12]\d|3[01]) # capture day, e.g. 1, 01, 12, 30 > [\-\/]+ # ignore separator > (\d{1,2}) # capture month, e.g. 1, 01, 12 > [\-\/]+ # ignore separator > (\d{4}|\d{2}) # capture year, e.g. 1975, 23 > $ # end of line > / > (_, day, month, year) = matcher[0] > assert [year, month, day] == ['2023', '06', '14'] > > You'd need a slight tweak to instead/also handle USA dates in mm-dd-yy[yy] > format. > > Cheers, Paul. > > > On Mon, Jul 10, 2023 at 6:53 AM Spencer Allain via users < > users-GSC0n/0aZo1d/SJB6HiN2Ni2O/[email protected]> wrote: > >> You have changed the first grouping into a non-capture group with ?:, so >> matcher[0][3] will be null, and matcher[0][1] will be the month and >> matcher[0][2] will be the year. >> >> I also believe that you should be able to reduce [\\\-\\\/] to be simply >> [-\/] because of using slashy-string for the regex (as only forward slash >> needs to be escaped) >> >> -Spencer >> >> On Sunday, July 9, 2023 at 12:08:17 PM EDT, James McMahon < >> [email protected]> wrote: >> >> >> Correction: this is my code... >> >> else if ( candidate =~ >> /^(?:0?[1-9]|[12]\d|3[01])[\\\-\\\/]+(\d{2}|\d{1})[\\\-\\\/]+(\d{4}|\d{2})$/ >> ) { >> >> log.error("BINGO!") >> >> matcher = candidate =~ >> /^(?:0?[1-9]|[12]\d|3[01])[\\\-\\\/]+(\d{2}|\d{1})[\\\-\\\/]+(\d{4}|\d{2})$/ >> matchedSubstring = matcher[0][0] >> log.error("Matcher: ${matcher.toString()}") >> log.error("Matched substring: ${matchedSubstring}") >> day = matchedSubstring[matcher[0][1]] >> month = matchedSubstring[matcher[0][2]] >> year = matcherSubstriong[matcher[0][3]] >> >> log.error("Day: ${day}") >> log.error("Month: ${month}") >> log.error("Year: ${year}") >> >> log.error("Length of Day: ${day.length()}") >> log.error("Length of Month: ${month.length()}") >> log.error("Length of Year: ${year.length()}") >> >> } >> >> I suspect I need to look at how I'm setting day, month, and year from >> matcher. >> >> The log output: >> 2023-07-09 16:04:47,406 ERROR [Timer-Driven Process Thread-10] >> o.a.nifi.processors.script.ExecuteScript >> ExecuteScript[id=33a5179c-1df4-128b-52be-aaa96b947012] Candidate: 06-14-2023 >> 2023-07-09 16:04:47,406 ERROR [Timer-Driven Process Thread-10] >> o.a.nifi.processors.script.ExecuteScript >> ExecuteScript[id=33a5179c-1df4-128b-52be-aaa96b947012] BINGO! >> 2023-07-09 16:04:47,406 ERROR [Timer-Driven Process Thread-10] >> o.a.nifi.processors.script.ExecuteScript >> ExecuteScript[id=33a5179c-1df4-128b-52be-aaa96b947012] Matcher: >> java.util.regex.Matcher[pattern=^(?:0?[1-9]|[12]\d|3[01])[\\\-\\/]+(\d{2}|\d{1})[\\\-\\/]+(\d{4}|\d{2})$ >> region=0,10 lastmatch=06-14-2023] >> 2023-07-09 16:04:47,406 ERROR [Timer-Driven Process Thread-10] >> o.a.nifi.processors.script.ExecuteScript >> ExecuteScript[id=33a5179c-1df4-128b-52be-aaa96b947012] Matched substring: >> 06-14-2023 >> 2023-07-09 16:04:47,406 ERROR [Timer-Driven Process Thread-10] >> o.a.nifi.processors.script.ExecuteScript >> ExecuteScript[id=33a5179c-1df4-128b-52be-aaa96b947012] Could not parse: >> 06-14-2023 >> >> On Sun, Jul 9, 2023 at 11:59 AM James McMahon <[email protected]> >> wrote: >> >> Hello. I have a conditional clause in my Groovy script that attempts to >> parse a date pattern of this form: 06-14-2023. It fails - I believe in the >> matcher. >> >> I am running from a NiFi ExecuteScript processor. Here is my conditional: >> >> } else if ( candidate =~ >> /^(?:0?[1-9]|[12]\d|3[01])[\\\-\\\/]+(\d{2}|\d{1})[\\\-\\\/]+(\d{4}|\d{2})$/ >> ) { >> >> log.error("BINGO!") >> >> matcher = candidate =~ >> /^(?:0?[1-9]|[12]\d|3[01])[\\\-\\\/]+(\d{2}|\d{1})[\\\-\\\/]+(\d{4}|\d{2})$/ >> log.error("Matcher: ${matcher.toString()}") >> log.error("Matched substring: ${matchedSubstring}") >> day = matchedSubstring[matcher[0][1]] >> month = matchedSubstring[matcher[0][2]] >> year = matcherSubstriong[matcher[0][3]] >> >> log.error("Day: ${day}") >> log.error("Month: ${month}") >> log.error("Year: ${year}") >> >> log.error("Length of Day: ${day.length()}") >> log.error("Length of Month: ${month.length()}") >> log.error("Length of Year: ${year.length()}") >> >> } >> >> My log output tells me I make it into the conditional, but then I fail on >> the matcher: >> >> 2023-07-09 15:52:23,547 ERROR [Timer-Driven Process Thread-2] >> o.a.nifi.processors.script.ExecuteScript >> ExecuteScript[id=33a5179c-1df4-128b-52be-aaa96b947012] Candidate: 06-14-2023 >> 2023-07-09 15:52:23,547 ERROR [Timer-Driven Process Thread-2] >> o.a.nifi.processors.script.ExecuteScript >> ExecuteScript[id=33a5179c-1df4-128b-52be-aaa96b947012] BINGO! >> 2023-07-09 15:52:23,547 ERROR [Timer-Driven Process Thread-2] >> o.a.nifi.processors.script.ExecuteScript >> ExecuteScript[id=33a5179c-1df4-128b-52be-aaa96b947012] Matcher: >> java.util.regex.Matcher[pattern=^(?:0?[1-9]|[12]\d|3[01])[\\\-\\/]+(\d{2}|\d{1})[\\\-\\/]+(\d{4}|\d{2})$ >> region=0,10 lastmatch=] >> 2023-07-09 15:52:23,547 ERROR [Timer-Driven Process Thread-2] >> o.a.nifi.processors.script.ExecuteScript >> ExecuteScript[id=33a5179c-1df4-128b-52be-aaa96b947012] Matched substring: >> *null* >> 2023-07-09 15:52:23,547 ERROR [Timer-Driven Process Thread-2] >> o.a.nifi.processors.script.ExecuteScript >> ExecuteScript[id=33a5179c-1df4-128b-52be-aaa96b947012] Could not parse: >> 06-14-2023 >> >> Can anyone help me get this matcher to work? >> >> Thanks in advance for any help. >> >> Jim >> >>