source.isJSONString

Use when: You want to read values from the original incoming message before any mapping changes. If you need the modified message during mapping, use message.isJSONString.

Signature: source.isJSONString(nodePath)

Returns: Boolean matched - true if the given JSON nodePath is a string node

Find the first node that matches nodePath and evaluates if it is a string or not.

Note

This method only applies to JSON-formatted messages.

Parameters

Type	Name	Description	Default
String	nodePath	the node path (XPath, HPath, Column ID, etc.)

Example

// Given a JSON source with string, object, and array values.
/* source:
{
    "name": "David",
    "age": 41,
    "favorite movie": {
        "title": "JAWS",
        "release-date": 1978
    },
    "children": []
}
*/

// Evaluate whether the node at nodePath is a JSON string.
if (source.isJSONString('/name')) {
    // The name node is a string value.
}

// Evaluate a non-string node.
if (!source.isJSONString('/age')) {
    // The age node is a number, not a string.
}