String Expression Format Functions

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The following string formatters can be used when building URLs, or creating unique Sample IDs/names.

 NameSynonymInput TypeDescriptionExample
defaultValue(string)   any Use the string argument value as the replacement value if the token is not present or is the empty string. ${field:defaultValue('missing')}
passThrough none any Don't perform any formatting. ${field:passThrough}
URL Encoding
encodeURI uri string URL encode all special characters except ',/?:@&=+$#' like JavaScript encodeURI() ${field:encodeURI}
encodeURIComponent uricomponent string URL uncode all special characters like JavaScript encodeURIComponent() ${field:encodeURIComponent}
htmlEncode html string HTML encode ${field:htmlEncode}
jsString   string Escape carrage return, linefeed, and <>"' characters and surround with a single quotes ${field:jsString}
urlEncode path string URL encode each path part preserving path separator ${field:urlEncode}
join(string)   collection Combine a collection of values together separated by the string argument ${field:join('/'):encodeURI}
prefix(string)   string, collection Prepend a string argument if the value is non-null and non-empty ${field:prefix('-')}
suffix(string)   string, collection Append a string argument if the value is non-null and non-empty ${field:suffix('-')}
trim   string Remove any leading or trailing whitespace ${field:trim}
date(string)   date Format a date using a format string or one of the constants from Java's DateTimeFormatter. If no format value is provided, the default format is 'BASIC_ISO_DATE' ${field:date}, ${field:date('yyyy-MM-dd')}
number   format Format a number using Java's DecimalFormat ${field:number('0000')}
first   collection Take the first value from a collection ${field:first:defaultValue('X')}
rest   collection Drop the first item from a collection ${field:rest:join('_')}
last   collection Drop all items from the collection except the last ${field:last:suffix('!')}


Function Applied to... Result
${Column1:defaultValue('MissingValue')} null MissingValue
${Array1:join('/')} [apple, orange, pear] apple/orange/pear
${Array1:first} [apple, orange, pear] apple
${Array1:first:defaultValue('X')} [(null), orange, pear]  X


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