# tJavaFlex Standard properties These properties are used to configure tJavaFlex running in the Standard Job framework. The Standard tJavaFlex component belongs to the Custom Code family. The component in this framework is available in all Talend products. ## Basic settings | Schema and Edit
Schema | A schema is a row description. It defines the number of fields
(columns) to be processed and passed on to the next component. When you create a Spark
Job, avoid the reserved word line when naming the
fields.

Click Sync columns to retrieve
the schema from the previous component in the Job.

This
component offers the advantage of the dynamic schema feature. This allows you to
retrieve unknown columns from source files or to copy batches of columns from a source
without mapping each column individually. For further information about dynamic schemas,
see *Talend Studio*
*User Guide*.

This
dynamic schema feature is designed for the purpose of retrieving unknown columns of a
table and is recommended to be used for this purpose only; it is not recommended for the
use of creating tables. | | --- | --- | | | Built-In: You create and store the schema locally for this component
only. | | | Repository: You have already created the schema and stored it in the
Repository. You can reuse it in various projects and Job designs.

When the schema to be reused has default values that are
integers or functions, ensure that these default values are not enclosed within
quotation marks. If they are, you must remove the quotation marks manually.


For more information, see the related
description of retrieving table schemas in Talend Studio User Guide. | | | Click Edit
schema to make changes to the schema. If the current schema is of the Repository type, three options are available:

| | Data Auto Propagate | Select this check box to automatically propagate the data to the
component that follows. | | Start code | Enter the Java code that will be called during the initialization
phase. | | Main code | Enter the Java code to be applied for each line in the data
flow. | | End code | Enter the Java code that will be called during the closing
phase. | ## Advanced settings | Import | Enter the Java code that helps to import, if necessary, external
libraries used in the Main code box
of the Basic settings view. | | --- | --- | | tStatCatcher Statistics | Select this check box to gather the Job processing metadata at a
job level as well as at each component level. | ## Global Variables | Global Variables | ERROR\_MESSAGE: the error message generated by the component when an
error occurs. This is an After variable and it returns a string. This variable functions
only if the Die on error check box
is cleared, if the component has this check
box.

A Flow variable functions during the execution of a component
while an After variable functions after the execution of the component.

To fill up a field or expression with a
variable, press Ctrl + Space to
access the variable list and choose the variable to use from it.

For further information about variables, see *Talend Studio*
*User Guide*. | | --- | --- | ## Usage | **Usage rule** | You can use this component as a start, intermediate or output
component. You can as well use it as a one-component subJob. | | --- | --- | | Limitation | You should know the Java language. |