tIterateToFlow
tIterateToFlow transforms a list into a data flow that can be
processed.
tIterateToFlow Standard properties
These properties are used to configure tIterateToFlow running in the Standard Job framework.
The Standard
tIterateToFlow component belongs to the Orchestration family.
The component in this framework is available in all Talend
products.
Basic settings
Schema and Edit |
A schema is a row description, it defines the number of fields Click Edit
|
 |
Built-in: The schema will be |
 |
Repository: The schema already |
Mapping |
Column: Enter a name for the
Value: Press Ctrl+Space to access all of the available variables, |
Advanced Settings
tStatCatcher Statistics |
Select this check box to collect the log data at a component |
Global Variables
Global Variables |
ERROR_MESSAGE: the error message generated by the A Flow variable functions during the execution of a component while an After variable To fill up a field or expression with a variable, press Ctrl + For further information about variables, see |
Usage
Usage rule |
This component is not startable (green background) and it requires |
Connections |
Outgoing links (from this component to another): Row: Main.
Trigger: Run if; On Component Ok; Incoming links (from one component to this one): Row: Iterate; For further information regarding connections, see |
Transforming a list of files as data flow
The following scenario describes a Job that iterates on a list of files, picks up the
filename and current date and transforms this into a flow, that gets displayed on the
console.

-
Drop the following components: tFileList,
tIterateToFlow and tLogRow from the Palette to the
design workspace. -
Connect the tFileList to the tIterateToFlow using an iterate link and connect the Job to the tLogRow using a Row main
connection. -
In the tFileList
Component view, set the directory where the
list of files is stored.

-
In this example, the files are three simple .txt files held in one directory:
Countries. -
No need to care about the case, hence clear the Case
sensitive check box. -
Leave the Include Subdirectories check box
unchecked. -
Then select the tIterateToFlow component et
click Edit Schema to set the new schema

-
Add two new columns: Filename of String type and Date of date type. Make sure you define the correct pattern
in Java. -
Click OK to validate.
-
Notice that the newly created schema shows on the Mapping table.

-
In each cell of the Value field, press
Ctrl+Space bar to access the list of global
and user-specific variables. -
For the Filename column, use the global variable:
tFileList_1CURRENT_FILEPATH
. It retrieves the current filepath
in order to catch the name of each file, the Job iterates on. -
For the Date column, use the Talend routine:
(in
Talend Date.getCurrentDate()
Java) -
Then on the tLogRow component view, select
the Print values in cells of a table check
box. -
Save your Job and press F6 to execute
it.

The filepath displays on the Filename column and the current date
displays on the Date column.