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Register databindings and transformers

To regsiter one or more databindings, you need to add entries to a plain text file named as META-INF/services/org.apache.tuscany.sca.databinding.DataBinding. This service provider file needs to be on the classpath when Tuscany is bootstrapped.

# implementation classes for the databindingsorgdatabindings
org.apache.tuscany.sca.databinding.axiom.AxiomDataBinding;type=org.apache.axiom.om.OMElement,name=axiom

The syntax is: <implementation_class_name>;type=<databinding_id>,name=<databinding_alias>

To register one or more transformers, you need to add entries to a plain text file named as META-INF/services/org.apache.tuscany.sca.databinding.PullTransformer. This service provider file needs to be on the classpath when Tuscany is bootstrapped.

# Implementation classes for the transformers
org.apache.tuscany.sca.databinding.axiom.Object2OMElement;source=java:simpleType,target=org.apache.axiom.om.OMElement,weight=10000
org.apache.tuscany.sca.databinding.axiom.OMElement2Object;source=org.apache.axiom.om.OMElement,target=java:simpleType,weight=10000
org.apache.tuscany.sca.databinding.axiom.OMElement2String;source=org.apache.axiom.om.OMElement,target=java.lang.String,weight=40
org.apache.tuscany.sca.databinding.axiom.OMElement2XMLStreamReader;source=org.apache.axiom.om.OMElement,target=javax.xml.stream.XMLStreamReader,weight=10
org.apache.tuscany.sca.databinding.axiom.String2OMElement;source=java.lang.String,target=org.apache.axiom.om.OMElement,weight=40
org.apache.tuscany.sca.databinding.axiom.XMLStreamReader2OMElement;source=javax.xml.stream.XMLStreamReader,target=org.apache.axiom.om.OMElement,weight=10

The syntax is: <implementation_class_name>;source=<source_databinding_id>,target=<target_databinding_id>,weight=<cost_of_the_transformation>

TODO List

• Support Collection or Array data types
• Better support interface/operation level databinding mappings
• Support databinding for java types which can be used for multiple datatypes, for example, InputStream or String can be used to represent various formats
• Better support exception/fault
• Support application data based introspection of operations