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API Docs - v5.0.0

Regex

find (Function)

These methods attempt to find the subsequence of the 'inputSequence' that matches the given 'regex' pattern.

Syntax

<BOOL> regex:find(<STRING> regex, <STRING> input.sequence, <INT> starting.index)

QUERY PARAMETERS

Name Description Default Value Possible Data Types Optional Dynamic
regex A regular expression that is matched to a sequence in order to find the subsequence of the same. For example, \d\d(.*)WSO2. STRING No No
input.sequence The input sequence to be matched with the regular expression. For example, 21 products are produced by WSO2. STRING No No
starting.index The starting index of the input sequence from where the input sequence ismatched with the given regex pattern. eg: 1, 2. INT No No

Examples EXAMPLE 1

define stream InputStream (inputSequence string, price long, regex string);

from InputStream select inputSequence , regex:find(\d\d(.*)WSO2, 21 products are produced by WSO2 currently) as aboutWSO2 insert into OutputStream;

This method attempts to find the subsequence of the 'inputSequence' that matches the regex pattern, \d\d(.*)WSO2. It returns true as a subsequence exists.

EXAMPLE 2

define stream InputStream (inputSequence string, price long, regex string);

from InputStream select inputSequence , regex:find(\d\d(.*)WSO2, 21 products are produced currently) as aboutWSO2 insert into OutputStream;

This method attempts to find the subsequence of the 'inputSequence' that matches the regex pattern, \d\d(.*)WSO2 . It returns 'false' as a subsequence does not exist.

EXAMPLE 3

define stream InputStream (inputSequence string, price long, regex string);

from InputStream select inputSequence , regex:find(\d\d(.*)WSO2, 21 products are produced within 10 years by WSO2 currently by WSO2 employees, 30) as aboutWSO2 insert into OutputStream;

This method attempts to find the subsequence of the 'inputSequence' that matches the regex pattern, \d\d(.*)WSO2 starting from index 30. It returns 'true' since a subsequence exists.

group (Function)

This method returns the input subsequence captured by the given group during the previous match operation.

Syntax

<STRING> regex:group(<STRING> regex, <STRING> input.sequence, <INT> group.id)

QUERY PARAMETERS

Name Description Default Value Possible Data Types Optional Dynamic
regex A regular expression. For example, \d\d(.*)WSO2. STRING No No
input.sequence The input sequence to be matched with the regular expression. For example, 21 products are produced by WSO2. STRING No No
group.id The given group id of the regex expression. For example, 0, 1, 2, etc. INT No No

Examples EXAMPLE 1

define stream InputStream (inputSequence string, price long, regex string, group int);

from InputStream select inputSequence, regex:group(\d\d(.*)(WSO2.*), 21 products are produced within 10 years by WSO2 currently by WSO2 employees, 3) 
 insert into OutputStream;

This function returns 'WSO2 employees', the input subsequence captured within the given groupID, 3 after grouping the 'inputSequence' according to the regex pattern, \d\d(.*)(WSO2.*).

lookingAt (Function)

This method attempts to match the 'inputSequence', from the beginning, against the 'regex' pattern.

Syntax

<BOOL> regex:lookingAt(<STRING> regex, <STRING> input.sequence)

QUERY PARAMETERS

Name Description Default Value Possible Data Types Optional Dynamic
regex A regular expression. For example, \d\d(.*)WSO2. STRING No No
input.sequence The input sequence to be matched with the regular expression. For example, 21 products are produced by WSO2. STRING No No

Examples EXAMPLE 1

define stream InputStream (inputSequence string, price long, regex string, group int);

from InputStream select inputSequence, regex:lookingAt(\d\d(.*)(WSO2.*), 21 products are produced by WSO2 currently in Sri Lanka)

This method attempts to match the 'inputSequence' against the regex pattern, \d\d(.*)(WSO2.*) from the beginning. Since it matches, the function returns 'true'.

EXAMPLE 2

define stream InputStream (inputSequence string, price long, regex string, group int);

from InputStream select inputSequence, regex:lookingAt(WSO2(.*)middleware(.*), sample test string and WSO2 is situated in trace and it's a middleware company)

This method attempts to match the 'inputSequence' against the regex pattern, WSO2(.*)middleware(.*) from the beginning. Since it does not match, the function returns false.

matches (Function)

This method attempts to match the entire 'inputSequence' against the 'regex' pattern.

Syntax

<BOOL> regex:matches(<STRING> regex, <STRING> input.sequence)

QUERY PARAMETERS

Name Description Default Value Possible Data Types Optional Dynamic
regex A regular expression. For example, \d\d(.*)WSO2. STRING No No
input.sequence The input sequence to be matched with the regular expression. For example, 21 products are produced by WSO2. STRING No No

Examples EXAMPLE 1

define stream InputStream (inputSequence string, price long, regex string, group int);

from InputStream select inputSequence, regex:matches(WSO2(.*)middleware(.*), WSO2 is situated in trace and its a middleware company)

This method attempts to match the entire 'inputSequence' against WSO2(.*)middleware(.*) regex pattern. Since it matches, it returns 'true'.

EXAMPLE 2

define stream inputStream (inputSequence string, price long, regex string, group int);

from inputStream select inputSequence, regex:matches(WSO2(.*)middleware, WSO2 is situated in trace and its a middleware company)

This method attempts to match the entire 'inputSequence' against WSO2(.*)middleware regex pattern. Since it does not match, it returns 'false'.