How to Declare Arrays in bpel and use them as acollection

Question

Hi,
I Am new to Bpel, I had created an empty Bpel Process and configured file adapter to a directory, In my text file i have 3 records with four columns, each column seperated by ',' and each record seperated by "EOL(end of line)", Below is the xsd file generated by the native format xsd builder, taken a recieve activity to recieve the contents of file from file adapter.
So all the data which is in the file will be there in recieve activity.
FileContents
55555,rgfdgsd,gfdgfdg,23
66666,retretret,trtertg,21
77777,rtrttreter,trtter,23
My Question is
I want to compare whether value of C1 = '55555' and if the value is equal to 55555 then that record with c1=55555 has to be inserted into database by using Arrays
How to compare the value of c1 through bpel functions.
with java i have to use the logic similar to this by using Xpath
getElement by tagname(c1);- it will give all the elements with tagname c1, three records are there with tagname c1 (c1=55555,c1=66666,c1=77777), we have to iterate through the elemnts and check whether the value iof c1='55555' and get the whole parent block which contains values of c1,c2,c3,c4 and insert that to database
What variables we have to use to get the Similar logic in bpel
<?xml version="1.0" encoding="UTF-8" ?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:nxsd="http://xmlns.oracle.com/pcbpel/nxsd"
targetNamespace="http://TargetNamespace.com/FileAdapter"
xmlns:tns="http://TargetNamespace.com/FileAdapter"
elementFormDefault="qualified"
attributeFormDefault="unqualified" nxsd:encoding="ASCII" nxsd:stream="chars" nxsd:version="NXSD">
<xsd:element name="Associates">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="Associate" minOccurs="1" maxOccurs="unbounded">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="C1" type="xsd:double" nxsd:style="terminated" nxsd:terminatedBy="," nxsd:quotedBy="&quot;">
</xsd:element>
<xsd:element name="C2" type="xsd:string" nxsd:style="terminated" nxsd:terminatedBy="," nxsd:quotedBy="&quot;">
</xsd:element>
<xsd:element name="C3" type="xsd:string" nxsd:style="terminated" nxsd:terminatedBy="," nxsd:quotedBy="&quot;">
</xsd:element>
<xsd:element name="C4" type="xsd:double" nxsd:style="terminated" nxsd:terminatedBy="${eol}" nxsd:quotedBy="&quot;">
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:schema>
I want to do it by using Arrays,
Please post the step by step procedure like
How to declare an Array?
How to iterate the results in recieve acticity of file adapter and put them to array?
How to compare the values in array with our desired value?
Please Look into this and suggest me the solution.
Regards

Answer 1

I think it is a good option to use transformations. Do you have any critical reason why you want to do this using array?
Little explanation below for your questions.
As per my understanding from variable is the recieve activity variable and to variable is the Array variable is it right?
Yes. Here I was try to build my array from the different source system data. This will append data to the array variable.
How can we declare an array variable in bpel(to variable) with name as Variable_Array, part as payload and query as ArrayList?
*Any element that can hold another element can be a array.
For example if element A is declared as sequence of element B type, then A acts as a array for B*
Could you please explain this also, what is from variable? and what is to variable?
+<assign name="Assign_XPath_For_Array">+
+<copy><from expression="concat('/ns1:ArrayList/ns2:ArrayElem') "/><to variable="Variable_Xpath"/></copy>+
+</assign>+
what is the type of to variable "Variable_Xpath"(String or int etc)?
This creates a dynamic Xpath and store in some variable here. Here the variable is called Variable_Xpath which is a string
similarly what is the type of to variable?
+<assign name="Assign_Read_Array">+
+<copy>+
+<from expression="bpws:getVariableData('Variable_Array','payload',bpws:getVariableData('Variable_Xpath'))"/>+
+<to variable="Variable_Read_Array_Element" query="/ns1: ABC"/>+
+</copy>+
+</assign>+
To variable type is the variable that I read from the Array.
*For example if A is the array holding B, then the to variable is B and from is doing A[counter]*
Every Little Helps
Kalidass Mookkaiah
http://oraclebpelindepth.blogspot.com/