Reference: Sample Studio MVEL Expressions

Variable	Sample Expression	Description
context	context.getProperty('myProperty')	Retrieves the value of the property myProperty from the MediationContext .
	context.getProperty('someProperty').equals('someValue')	Retrieves the property someProperty from the MediationContext if the property value is set to someValue .
da	da.toVar('eib_transform_output.txt', 'var1')	Retrieves a document from an integration event with filename eib_transform_output.txt and adds a variable named var1 .
	da.getDocsMatching('label')	Retrieves a document with the given label.
ec	ec.getAttribute('attributeName')	Retrieves an attribute name.
	ec.integrationMapLookup('map', 'key')	Retrieves an integration map value.
env	env['cc.hostname']	Retrieves the cc.hostname environment property set as -Dcc.hostname on the command line.
	env.containsKey('key')	Displays as true if environment properties contain the given key.
ftp	ftp.list('URL')	Retrieves a list of files for a URL.
intsys	intsys.getAttribute('username')	Retrieves an integration attribute named username .
	intsys.isServiceEnabled('name')	Displays as true if an integration service with the given name exists.
lp	lp.getSimpleData('name')	Retrieves the value of a launch parameter with the given name.
	lp.exists('label') == true	Displays as true if a parameter with the given label exists.
message	message.rootPartAsText	Retrieves the root part of a message as text from the MediationMessage interface.
	message.variables	Retrieves MediationContext variables.
mtable	mtable['my_property'].set(0, 'Data_Column', 'my_test_data')	Sets data in an mtable .
	mtable['my_property'].get(0, 'Data_Column')	Retrieves data from an mtable .
parts	parts[0].getHeader('someHeader')	Retrieves the header someHeader from the root part.
	parts[0].xpathB('/a/b')	Implements the xpathB method to evaluate an XPath Boolean expression.
props	props.myProperty	Retrieves the value of the property myProperty from the MediationContext .
	props['bean.property']	Retrieves the value of the property bean.property from the MediationContext .
spring	spring.getBean('fred').name	Retrieves the name attribute of the bean called Fred in the Spring context.
	spring.parent ApplicationContext	Accesses the Spring application context.
util	props['is.last.record'] = util.isLastMessageInBatch()	Checks whether the current message in the MediationContext is the last message that the splitter component will generate.
	<ns:Message_Summary>@{util.cleanString(props['is.message.summary'])}</ns:Message_Summary>	Implements the cleanString(String) function to ensure that an assembly component produces well-formed XML.
vars	vars['myVariable'].length	Retrieves the length of the variable myVariable .
	vars['myVariable'].mimeType	Retrieves the MIME type associated with the variable myVariable .
xmldiff	xmldiff.isDifferent() == true	Checks whether there are differences between 2 documents.
	xmldiff.changes	Retrieves a list of differences between 2 documents.

context

context.getProperty('myProperty')

Retrieves the value of the property

myProperty

from the

MediationContext

.

context.getProperty('someProperty').equals('someValue')

Retrieves the property

someProperty

from the

MediationContext

if the property value is set to

someValue

.

da

da.toVar('eib_transform_output.txt', 'var1')

Retrieves a document from an integration event with filename

eib_transform_output.txt

and adds a variable named

var1

.

da.getDocsMatching('label')

Retrieves a document with the given label.

ec

ec.getAttribute('attributeName')

Retrieves an attribute name.

ec.integrationMapLookup('map', 'key')

Retrieves an integration map value.

env

env['cc.hostname']

Retrieves the

cc.hostname

environment property set as

-Dcc.hostname

on the command line.

env.containsKey('key')

Displays as true if environment properties contain the given key.

ftp

ftp.list('URL')

Retrieves a list of files for a URL.

intsys

intsys.getAttribute('username')

Retrieves an integration attribute named

username

.

intsys.isServiceEnabled('name')

Displays as true if an integration service with the given name exists.

lp

lp.getSimpleData('name')

Retrieves the value of a launch parameter with the given name.

lp.exists('label') == true

Displays as true if a parameter with the given label exists.

message

message.rootPartAsText

Retrieves the root part of a message as text from the

MediationMessage

interface.

message.variables

Retrieves

MediationContext

variables.

mtable

mtable['my_property'].set(0, 'Data_Column', 'my_test_data')

Sets data in an

mtable

.

mtable['my_property'].get(0, 'Data_Column')

Retrieves data from an

mtable

.

parts

parts[0].getHeader('someHeader')

Retrieves the header

someHeader

from the root part.

parts[0].xpathB('/a/b')

Implements the

xpathB

method to evaluate an XPath Boolean expression.

props

props.myProperty

Retrieves the value of the property

myProperty

from the

MediationContext

.

props['bean.property']

Retrieves the value of the property

bean.property

from the

MediationContext

.

spring

spring.getBean('fred').name

Retrieves the

name

attribute of the bean called

Fred

in the Spring context.

spring.parent ApplicationContext

Accesses the Spring application context.

util

props['is.last.record'] = util.isLastMessageInBatch()

Checks whether the current message in the

MediationContext

is the last message that the splitter component will generate.

<ns:Message_Summary>@{util.cleanString(props['is.message.summary'])}</ns:Message_Summary>

Implements the

cleanString(String)

function to ensure that an assembly component produces well-formed XML.

vars

vars['myVariable'].length

Retrieves the length of the variable

myVariable

.

vars['myVariable'].mimeType

Retrieves the MIME type associated with the variable

myVariable

.

xmldiff

xmldiff.isDifferent() == true

Checks whether there are differences between 2 documents.

xmldiff.changes

Retrieves a list of differences between 2 documents.