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The BTE is a Java framework developed by the Hellenic National Documentation Centre (EKT, www.ekt.gr ) and consists of a programmatic APIs for filtering and modifying records that are retrieved from various types of data sources (eg. databases, files, legacy data sources) as well as for outputing them in appropriate standards formats (eg. database files, txt, xml, Excel). The framework includes independent abstract modules that are executed seperately, offering in many cases alternative choices to the user depending of the input data set, the transformation workflow that needs to be executed and the output format that needs to be generated. 

The basic idea behind the BTE is a standard workflow that consists of three steps, a data loading step, a processing step (record filtering and modification) and an output generation. A data loader provides the system with a set of Records, the processing step is responsible for filtering or modifying these records and the output generator outputs them in the appropriate format.

The standard BTE version offers several predefined Data Loaders as well as Output Generators for basic bibliographic formats. However, Spring Dependency Injection can be utilized to load custom data loaders, filters, modifiers and output generators. 

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So, in case you need to process more metadata fields than those that are specified by default, you need to change the data loader configuration and the output map.

Case Studies

1) I have my data in a format different from the ones that are supported by this functionality. What can I do?

Either you try to easily transform your data to one of the supported formats or you need to create a new data loader. To do this, create a new Java class that implements the following Java interface from BTE:

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2) I need to filter some of the input records or modify some value from records before outputting them
 
In this case you will need to create your own filters and modifiers.
 
To create a new filter, you need to extend the following BTE abstact class:  

gr.ekt.bte.core.AbstractFilter

You will need to implement the following method:

public abstract boolean isIncluded ( Record  record )

Return false if the specified record needs to be filtered, otherwise return true.

To create a new modifier, you need to extend the following BTE abstact class:

gr.ekt.bte.core.AbstractModifier

You will need to implement the following method:  

public abstract Record modify ( Record record )

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