DSL ZESB > JPATH

JPATH - синтаксис

A JSONPath expression specifies a path to an element (or a set of elements) in a JSON structure. Paths can use the dot notation:

$.store.book[0].title

or the bracket notation:

$['store']['book'][0]['title']

The leading $ represents the root object or array and can be omitted. For example, $.foo.bar and foo.bar are the same, and so are $[0].status and [0].status.

Other syntax elements are described below.

Expression	Description
$	The root object or array.
.property	Selects the specified property in a parent object.
['property']	Selects the specified property in a parent object. Be sure to put single quotes around the property name. Tip: Use this notation if the property name contains special characters such as spaces, or begins with a character other than A..Za..z_.
[n]	Selects the n-th element from an array. Indexes are 0-based.
[index1,index2,…]	Selects array elements with the specified indexes. Returns a list.
..property	Recursive descent: Searches for the specified property name recursively and returns an array of all values with this property name. Always returns a list, even if just one property is found.
*	Wildcard selects all elements in an object or an array, regardless of their names or indexes. For example, address.* means all properties of the address object, and book[*] means all items of the book array.
[start:end] [start:]	Selects array elements from the start index and up to, but not including, end index. If end is omitted, selects all elements from start until the end of the array. Returns a list.
[:n]	Selects the first n elements of the array. Returns a list.
[-n:]	Selects the last n elements of the array. Returns a list.
[?(expression)]	Filter expression. Selects all elements in an object or array that match the specified filter. Returns a list.
[(expression)]	Script expressions can be used instead of explicit property names or indexes. An example is [(@.length-1)] which selects the last item in an array. Here, length refers to the length of the current array rather than a JSON field named length.
@	Used in filter expressions to refer to the current node being processed.

Notes:

•JSONPath expressions, including property names and values, are case-sensitive.

•Unlike XPath, JSONPath does not have operations for accessing parent or sibling nodes from the given node.

Filters are logical expressions used to filter arrays. An example of a JSONPath expression with a filter is

$.store.book[?(@.price < 10)]

where @ represents the current array item or object being processed. Filters can also use $ to refer to the properties outside of the current object:

$.store.book[?(@.price < $.expensive)]

An expression that specifies just a property name, such as [?(@.isbn)], matches all items that have this property, regardless of the value.

Additionally, filters support the following operators:

Operator	Description
==	Equals to. 1 and '1' are considered equal. String values must be enclosed in single quotes (not double quotes): [?(@.color=='red')].
!=	Not equal to. String values must be enclosed in single quotes.
>	Greater than.
>=	Greater than or equal to.
<	Less than.
<=	Less than or equal to.
=~	Match a JavaScript regular expression. For example, [?(@.description =~ /cat.*/i)] matches items whose description starts with cat (case-insensitive). Note: Not supported at locations that use ReadyAPI 1.1.
!	Use to negate a filter: [?(!@.isbn)] matches items that do not have the isbn property. Note: Not supported at locations that use ReadyAPI 1.1.
&&	Logical AND, used to combine multiple filter expressions: [?(@.category=='fiction' && @.price < 10)]
\|\|	Logical OR, used to combine multiple filter expressions: [?(@.category=='fiction' \|\| @.price < 10)] Note: Not supported at locations that use ReadyAPI 1.1.