For Loops

Mirth® Connect by NextGen Healthcare User Guide

Conditional Statements

Velocity supports if..else statements, with the #if / #elseif / #else directives: There #if($list.size()==1)is#{else}are#end ${list.size()} total value#if($list.size()!=1)s#end The curly brackets ("{}") are only needed if the if/else/end might be confused with template data immediately before or after. Parent topic: Velocity Variable Replacement

Mirth® Connect by NextGen Healthcare User Guide

Basic Syntax

Basic syntax for a Velocity reference is as follows: ${variableName} The brackets may be omitted if the identifier starts with a letter and contains only letters, numbers, hyphens, or underscores: $variableName The variable will be looked up in all available maps, according to The Variable Map Lookup Sequence. The string representation of the value will then replace the Velocity reference. You can also access properties and methods from context variables: ${myArray.length}${myList.size()}${myObject.customMethod('param')} If a property has a corresponding getter method (like getValue()), the engine will automatically find that method when you attempt to access the property. Therefore these may be equivalent: ${myObject.value}${myObject.getValue()} If the context variable doesn't exist, or if the value returned by the reference evaluation is null, no replacement will be done, so the final template will still have your "${varName}" string within. In these cases you can put an exclamation

Mirth® Connect by NextGen Healthcare User Guide

Velocity Variable Replacement

The Apache Velocity template engine is used throughout Mirth® Connect to allow dynamic variables to be injected into property fields. For example, you can use a transformer to programmatically select a TCP address/port to send to and store those values in the channel map, and then use a Velocity template to inject those variables into the TCP Sender settings. Basic Syntax Conditional Statements For Loops Basic Syntax Conditional Statements For Loops

Mirth® Connect by NextGen Healthcare User Guide

for each…in loops

These loops are part of the E4X standard. Unlike other for loop constructs, for each…in loops usually have no explicit counter; they essentially say "do this to everything in this set" rather than "do this X times." This avoids possible off-by-one errors and makes code easier to read. These loops are used to iterate through elements in an array (or collection) or in the property values of an object. Syntax (for each...in loops) Example for each (var in object) { // Code to execute} var sources = new Array ();sources [0] = "Customer 1";sources [1] = "Customer 2";sources [2] = "Customer 3";for each (src in sources) { logger.info(src);} Parent topic: Loops and Iterations

Mirth® Connect by NextGen Healthcare User Guide

for loops

These loops are often distinguished by an explicit loop counter (variable), which lets the body of the for loop (the code that is being repeatedly executed) know about the sequencing of each iteration. for loops are typically used when the number of iterations is known before the loop is entered. Syntax (for loops) Example for (index=startValue; endCondition; incIndex) { // Code to execute} for (var i=0; i<10; i++) { logger.info("i = " + i);} Parent topic: Loops and Iterations

Mirth® Connect by NextGen Healthcare User Guide

Destination Mappings

This section is to the right of the destination connector properties, and allows you to easily drag-and-drop common variables/templates into fields of the connector properties. Standard variables/templates are available across all destination connectors. Custom mapper variables come from the Mapper Steps you have added in the current destination or in any previous destinations. For additional information on Velocity replacement, see Velocity Variable Replacement. Standard Variables/Templates Parent topic: Destinations Tab

For Loops

Recommendations

Conditional Statements

Basic Syntax

Velocity Variable Replacement

for each…in loops

for loops

Destination Mappings

For Loops

Conditional Statements

Basic Syntax

Velocity Variable Replacement

for each…in loops

for loops

Destination Mappings