pc:assign-nodeset-from-json

note

This article is about the pc:assign-nodeset-from-json Blend directive.

pc:assign-nodeset-from-json

Converts a JSON fragment to an equivalent XML fragment for the purpose of processing in a USoft Blend context.

Syntax

<pc:assign-nodeset-from-json *variable*="{ *filepath* | *xpath* }">

The required variable is a variable name by which you can reference the converted JSON later in the script, using:

$*variable*

• To read the JSON input from file, specify filepath. See Example 1.* *
• To pass inline JSON input in the script itself, specify an xpath expression. See Example 2.

Example 1

<example xmlns:pc="Processing.Command">
  <pc:assign-nodeset-from-json
    xmlresult = "{path:Combine('c:\usoft\blend\JSON', 'app.config.json')}" />
  <pc:copy-of select="$xmlresult"/>
</example>

 Example 2a

This example passes JSON as embedded text:

<example xmlns:pc="Processing.Command">
	<pc:assign-nodeset-from-json xmlresult = "{.}">
	  {"myname":"Lakshmi"}
	</pc:assign-nodeset-from-json>
	<pc:copy-of select="$xmlresult"/>
</example>

 Example 2b

This example passes JSON as the content of an**element:

<example xmlns:pc="Processing.Command">
	<pc:assign-nodeset-from-json xmlresult = "{myjson}">
	  <myjson>{"myname":"Lakshmi"}</myjson>
	</pc:assign-nodeset-from-json>
	<pc:copy-of select="$xmlresult"/>
</example>

 Example 2c

This example passes JSON as the value of an**attribute. The attribute value is specified by single quotes because the JSON content already uses double quotes:

<example xmlns:pc="Processing.Command">
	<pc:assign-nodeset-from-json xmlresult = "{myjson/@somejson}">
	  <myjson somejson='{"myname":"Lakshmi"}'/>
	</pc:assign-nodeset-from-json>
	<pc:copy-of select="$xmlresult"/>
</example>

 Example 2d

This example passes JSON as an inline expression. The double brackets are an escape strategy. They are needed because single brackets would be interpreted as an XSLT attribute value template:

<example xmlns:pc="Processing.Command">
	<pc:assign-nodeset-from-json xmlresult = '{{"myname":"Lakshmi"}}'/>
	<pc:copy-of select="$xmlresult"/>
</example>

 Example 2e

This example passes JSON inline in a string variable:

<example xmlns:pc="Processing.Command">
	<pc:assign-string jsonstring = "{.}">{"myname":"Lakshmi"}</pc:assign-string>
	<pc:assign-nodeset-from-json xmlresult = "{$jsonstring}" />
	<pc:copy-of select="$xmlresult"/>
</example>

 Example 2f

This example explicitly calls the underlying converter function to a JSON string and catches the result in a nodeset variable:

<example xmlns:pc="Processing.Command">
	<pc:assign-string jsonstring = "{.}">{"myname":"Lakshmi"}</pc:assign-string>
	<pc:assign-nodeset xmlresult = "{xslutil:json2xml($jsonstring)}" />
	<pc:copy-of select="$xmlresult"/>
</example>