coderz.py

Media Type Metadata Selector (.^mediaType)

Returns the MIME type of a value that includes parameters (for example, application/json;charset=UTF-16). The expression in the value of { “myMediaType” : payload.^mediaType } might return “myMediaType”: “/; charset=UTF-8” for an input POJO.

November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments

Encoding Metadata Selector (.^encoding)

In the following Mule app flow, the Logger uses payload.^encoding to select the encoding of “my string”`set in the Set Payload (`set-payload) component.

November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments

Class Metadata Selector (.^class)

Returns the class of the Plain Old Java Object (POJO). The value might result from calling a method in a Java class or have a data type (such as String or DateTime) that DataWeave treats as a Java value.

November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments

Content Length Metadata Selector (.^contentLength)

In the following Mule app flow, the Logger uses payload.^contentLength to select the length of the string my string, set in the Set Payload (set-payload) component.

November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments

Metadata Selector (.^someMetadata)

Returns the value of specified metadata for a Mule payload, variable, or attribute.

November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments

Filter Selectors (myKey[?($ == “aValue”)])

myKey[?($ == “aValue”)] returns only the values of matching keys within an array or object. Note that ? is also used in Key Present Validator. If no key-value pairs match, the result is null.

November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments

Selector Modifiers (!, ?)

You can check for the presence of a given key.
! evaluates the selection and fails with an exception message if the key is not present.

? returns true if the selected key is present, false if not. Note that ? is also used in
Filter Selectors (myKey[?($ == “aValue”)]).

November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments

Namespace Selector (#)

# returns the XML namespace of a selected key as plain text.

November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments

XML Attribute Selector (.@myKey)

Using .@ without the key name returns an object containing the attributes as key-value pairs.

November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments

Range selector (anIndex to anotherIndex)

If you need multiple sequential values from an Array, DataWeave allows you to select a range of values with the range selector ([n to m]).

November 21, 2021 | Dataweave, Mule 4, Mulesoft | No comments