wrapIfMissing

wrapIfMissing(String, String): String

Wraps text with wrapper if that wrapper is missing from the start or end of the given string.

Introduced in DataWeave 2.2.0. Supported by Mule 4.2 and later.

Parameters

Name Description

Name	Description
`text`	The input string.
`wrapper`	The content used to wrap.

text

The input string.

wrapper

The content used to wrap.

Example

This example shows how wrapIfMissing behaves with different inputs and sizes.

Source

%dw 2.0
import * from dw::core::Strings
output application/json
---
 {
   "a": wrapIfMissing(null, "'"),
   "b": wrapIfMissing("", "'"),
   "c": wrapIfMissing("ab", "x"),
   "d": wrapIfMissing("'ab'", "'"),
   "e": wrapIfMissing("/", '/'),
   "f": wrapIfMissing("a/b/c", '/'),
   "g": wrapIfMissing("/a/b/c", '/'),
   "h": wrapIfMissing("a/b/c/", '/')
 }

Output

{
   "a": null,
   "b": "'",
   "c": "xabx",
   "d": "'ab'",
   "e": "/",
   "f": "/a/b/c/",
   "g": "/a/b/c/",
   "h": "/a/b/c/"
 }

wrapIfMissing(Null, String): Null

Helper function that enables wrapIfMissing to work with a null value.