How to use positive lookahead for a specific word in apache regex -

how use positive lookahead specific word in apache regex.

example:

in java regex have following regex ^(?=.*\blocal\sservice\b).

what equivalent regex in apache regex? there positive lookahead in apache regex equivalent ?=

in short: apace uses pcre regex engine, 1 of full-featured engines out there. can use same lookahead used in java.

there slight differences, shouldn't matter pattern.

for reference: token-by-token comparison of pattern in java , pcre

• assert position @ beginning of string ^
• assert regex below can matched, starting @ position (positive lookahead) (?=.*\blocal\sservice\b)
  • java 8 interprets part differently .*
    • match single character not line break character (line feed, carriage return, next line, line separator, paragraph separator) .*
      • between 0 , unlimited times, many times possible, giving needed (greedy) *
  • pcre 8.34–8.35 utf-32 interprets part differently .*
    • match single character not line break character (line feed) .*
      • between 0 , unlimited times, many times possible, giving needed (greedy) *
  • java 8: assert position @ word boundary (position preceded or followed—but not both—by unicode letter, digit, or underscore) \b
  • pcre 8.34–8.35 utf-32: assert position @ word boundary (position preceded or followed—but not both—by ascii letter, digit, or underscore) \b
  • match character string “local” literally (case sensitive) local
  • match single character “whitespace character” (ascii space, tab, line feed, carriage return, vertical tab, form feed) \s
  • match character string “service” literally (case sensitive) service
  • java 8: assert position @ word boundary (position preceded or followed—but not both—by unicode letter, digit, or underscore) \b
  • pcre 8.34–8.35 utf-32: assert position @ word boundary (position preceded or followed—but not both—by ascii letter, digit, or underscore) \b