Code Snippets

Append an XML node

Verified

Added by iNTERFACEWARE

Use node.append() to append a node to an XML node tree

Source Code

   -- create sample XML node
   local x = [[
      <patient>
         <first-name>John</first-name>
         <last-name>Smith</last-name>
      </patient>]]
   xmlMsg = xml.parse(x)
   trace(xmlMsg)
   
   -- append an ATTRIBUTE
   xmlMsg.patient:append(xml.ATTRIBUTE, 'id')
   trace(xmlMsg)
   
   -- append an ELEMENT
   xmlMsg.patient:append(xml.ELEMENT, 'middle-name')
   trace(xmlMsg)
   
   -- append a TEXT element
   xmlMsg.patient:append(xml.TEXT, 'This is a text comment')
   trace(xmlMsg)
   
   -- append a CDATA (unparsed text) element
   xmlMsg.patient:append(xml.CDATA, 'Because CDATA is not parsed it allows & and <>')
   trace(xmlMsg)

Description

Use node.append() to append a node to an XML node tree

Usage Details

Use node.append() to append a new XML node to an XML node tree. The code shows how to append the four different types of XML nodes. There are a few tricks to learn with XML node trees, so be sure to look the “more info” links below.

Note: The node.append() function only works with XML node trees.

How to use the snippet:

Paste the desired append code into your script

More Information

• node.append
• xml.parse
• Reading an empty XML TEXT element from a node tree
• How to set an XML node to a space ” ” character
• XML Techniques in the Iguana Protocols repo

Check if a node is a leaf node

Added by iNTERFACEWARE

Code Snippets

Use node.isLeaf() to check if a node is a leaf node (has no children), works for all node types

Check if a node is a primary key

Added by iNTERFACEWARE

Code Snippets

Use node.isKey() to check if a node is the primary key for a database table, this method only for table node trees

Check if a node is empty (null)

Added by iNTERFACEWARE

Code Snippets

Use node.isNull() to check if a node is null (not present), works for all node types

Connect to a DB

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Code to connect to commonly used databases (connecting to other databases is very similar).

Continue channel processing when an error occurs

Added by iNTERFACEWARE

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Use iguana.stopOnError(false) to prevent a channel from stopping when an error occurs

Conversion to string or number

Added by iNTERFACEWARE

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How to convert numbers and node trees to a to string representation, and how to convert a numeric strings to numbers

Convert a string to upper or lower case

Added by iNTERFACEWARE

Code Snippets

Convert a string to upper case with string.upper(), or lower case with string.lower()

Convert HL7 messages to/from XML

Added by iNTERFACEWARE

Code Snippets

How to convert an HL7 message to and from an XML representation, using chm.toXml{} and chm.fromXml{}

Converting characters to/from numeric codes

Added by iNTERFACEWARE

Code Snippets

Convert characters to/from numeric codes, the codes will vary depending on the code page settings

Count child nodes

Added by iNTERFACEWARE

Code Snippets

Use node.childCount() to count the number of children for a specified node, works for all node types

Create a bzip2 or gzip file

Added by iNTERFACEWARE

Code Snippets

How to create and unzip a bzip2 or gzip file, using filter.bzip2.deflate() and filter.bzip2.inflate() or gzip.deflate() and gzip.inflate()

Create a directory

Added by iNTERFACEWARE

Code Snippets

Use os.fs.mkdir() to create a directory

Create a Generic ACK

Added by iNTERFACEWARE

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Create a generic ACK by using a script in an LLP Listener component

Create a zip file

Added by iNTERFACEWARE

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How to create and unzip a zip file containing multiple files and directories, using filter.zip.deflate() and filter.zip.inflate()

Creating log entries

Added by iNTERFACEWARE

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How to create Error, Warning, Informational, and Debug log entries

Delete a directory

Added by iNTERFACEWARE

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Use os.fs.rmdir() to delete an empty directory, if the directory is not empty an error is returned

Delete a file or directory

Added by iNTERFACEWARE

Code Snippets

Use os.remove() to delete a file or directory, only an empty directory can be deleted

Delete a node tree element

Added by iNTERFACEWARE

Code Snippets

Use node.remove() to delete an element from a table,

Delete a table element

Added by iNTERFACEWARE

Code Snippets

Use table.remove() to delete an element from a table

Extract html tags with PCRE regex

Added by iNTERFACEWARE

Code Snippets

How to extract the tags from a string of html, using PCRE regex with string.rxmatch()

Code Repository

Append an XML node