Talend Data Mapper - steffenbischoff.com
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Transcript of Talend Data Mapper - steffenbischoff.com
What is Talend Data Mapper?
• Talend Data Mapper allows you to map complex data structures and documents and execute transformations
• Various complex formats: XML, JSON, EDI, HL7, Cobol, AVRO, …
• Integrated in Talend Studio (separate Perspective)
• Development, Testing, Maintenance
• XQuery
• Included in all Talend Platforms
Talend Data Mapper Advantages
• Different Formats, same way of work
• Complex mapping simplified
• Reusable
• Documentation
• Easy Testing
Talend Studio 8 - Installation
• Talend Data Mapper not enabled per default
• Enable in Features (Feature Manager)
Mapping in context
• tMap
Mapping in context
• tMap
• tXmlMap
Mapping in context
• tMap
• tXmlMap
• tHMap
Talend Studio – Data Mapper
• Metadata / Perspektive
Structures
• Input / Output Structures
• Manually created or imported
• Single Root Node
• Metadata
Structures
• Create From sample file or manually
Structures
• Highlighting
Maps
• Input and Output Structure
• Transformations
Maps
• Create Map
Maps
• Create Map
Maps
• Create Map, select Input & Output Structure
Maps
• Create Map, select Input & Output Structure
Maps
• Create Map, select Input & Output Structure, Map elements
Drag & Drop, automaticmapping matching names
Expressions
• Expressions use functions, arguments and references to map elements in order to define the actions to be performed in the map.
• Functions: units of code that accept arguments and return a single value
• Arguments: parameters used to define a function, e.g. filter.
• Map elements: references to elements in the input or output structure of the map.
Expressions
• Expressions usage:
Loop
• Looping over elements, which appear multiply times
• Filter
• Sorting
Tree form:
Text form:
Value
• Defines the value of the element. It can be an expression or a simple reference to a map element.
Emit
• Defines the conditions where this element is emitted (forced to appear) when the element is optional or part of a choice
Validate
• Runtime Data Validation Filter Output
Util
• expression associated with the output map element
• executed before the map element is executed
Functions
• General
• Comparison and Logical
• Date and Time
• Aggregate
• Arithmetic
• Data Masking
• String
• Loop
• Special …
Java functions
• Possibility to use any Java Functions
Custom routines / JARs
• Any code and functionality using routines
Custom routines / JARs
• Any code and functionality using routines
• Custom JARs need to be in Mapper Class Path
Context variables
• Context Variables
• Read in Data Mapper – Function GetMapProperty
• context.Name
Using in DI Jobs
• Use flat structure – generated from schema
• Use complex structures – Data Mapper metadata
Using in DI Jobs
• Component Configuration
Using in DI Jobs
• Component Configuration
Using in Routes
• Use cMap Component in Route
• Use tHMap Component in Service
Testing
• Testing in Studio – whole document
Testing
• Testing in Studio – whole document
Testing
• Testing in Studio – selected elements
Testing
• Testing in Studio – selected elements
Test cases
• Create test case from Test output
Test cases
• Run Test case
Test cases
• Run Test case
Demo
Questions
