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	1	+{{toc/}}
	2	+
1	1	= Introduction =
2	2
3		- Variable is a container that holds a value and can be called in the iXPath Scenario. The importance of variables is to make flexibility in using some values without referring to their origins.
	5	+ Variable is a container that holds a value and can be called in the iXPath Scenario. The importance of
4	4
	7	+variables is to make flexibility in using some values without referring to their origins.
	8	+
5	5	There are 2 types of  variables:
6	6
7	7	* System variables
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9	9
10	10	To call a variable, we should put it inside ${}. Eg: for a variable named ‘iXVar’, it can be called as ${iXVar}.
11	11
12		-== System variables ==
	16	+== System variables ==
13	13
14	14	System variables define some default values in the system, and they can be called by users several times.
15	15
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29	29	1*. (((
30	30	(% style="width:884px" %)
31	31	|(% style="width:150px" %)**Function**|(% style="width:365px" %)**Description**|(% style="width:367px" %)**Use**
32		-|(% style="width:150px" %)Get(i) |(% style="width:365px" %)Get a file with index number "i" from the BpmnFile list, the indexes begin from 0 as the first element, and so on.|(% style="width:367px" %)(((
	36	+|(% style="width:150px" %)Get( x ) |(% style="width:365px" %)Get a file with index number "x" from the BpmnFile list, the indexes begin from 0 as the first element, and so on.|(% style="width:367px" %)(((
33	33	if we have an XmlToXml connector named "XmlToXml1" we can get __the second__ BpmnFile as :
34	34
35	35	${XmlToXml1.get(1)}
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55	55	)))
56	56	)))
57	57
	62	+== Local variables ==
58	58
59		-== Local variables ==
60		-
61	61	Local variable is a type of variable that can be newly created and used for a certain need.
62	62
63	63	So as to create a local variable "newVar" with a value equals to "var number 1", we should write this piece of XSL code :
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67	67
68	68	{{/code}}
69	69
70		-The call of this new variable in the scnario is similar to previous system variables:  **${newVar}.**
	73	+The call of this new variable in the scenario is similar to previous system variables:  **${newVar}.**
71	71
72		-To get 'newVar' from XSL file :
	75	+To get 'newVar' inside an XSL file :
73	73
74	74	{{code language="XML"}}
75		-<xsl:value-of select="ixf:getVar('Var')"></xsl:value-of>
	78	+<xsl:value-of select="ixf:getVar('newVar')"></xsl:value-of>
76	76	{{/code}}
77	77
	81	+= Examples =
78	78
	83	+We set a simple example of a scenario to illustrate how to use variables.
79	79
	85	+We want to receive a file by a FileListener and send it by mail that contains a message body.
80	80
	87	+here is the scenario:
81	81
	89	+ [[image:2021-04-27_21h31_55.png||height="140" width="446"]]
82	82
	91	+The configuration of the "SendMail" is :
	92	+
	93	+ [[image:2021-04-27_21h32_07.png||height="373" width="281"]]
	94	+
	95	+As shown in the mail body, we called 3 variables which are :
	96	+
	97	+* Env: the current environment
	98	+* iXSession : ID session
	99	+* path : the path of BpmnFile in FileListener1.
	100	+
	101	+= String Class =
	102	+
	103	+in java language, The String class represents character strings. It contains a lot of functions to handle String object.
	104	+
	105	+you can discover all these functions on the following URL :
	106	+
	107	+__[[https:~~/~~/docs.oracle.com/javase/8/docs/api/java/lang/String.html#method.summary>>https://docs.oracle.com/javase/8/docs/api/java/lang/String.html#method.summary]] __
	108	+
	109	+Eg: to check if a variable "myVar" is empty or not, we refer to the isEmpty() method as ${myVar.isEmpty()}, if so then it returns true, if not it will return false.
	110	+
	111	+
83	83

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