Michael Joyce created OODT-627:
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Summary: XMLPS field mapping function attribute names are confusing
Key: OODT-627
URL: https://issues.apache.org/jira/browse/OODT-627
Project: OODT
Issue Type: Improvement
Components: xmlps
Affects Versions: 0.5
Reporter: Michael Joyce
Fix For: 0.6
In the mapping file we can specify a mapping function to apply to a field. This
allows for semi-complex mappings to be handled easily. However, the current
calls in XMLPS result in the mappings being applied in reverse order (relative
from the "expected" direction).
Consider the following mapping that modifies the example config mentioned in
the XMLPS Quick Start Guide [1]. Instead of returning the id as a number we
want it as either the string "first" or "second".
{code:xml}
<field type="dynamic" name="id" dbname="product_id">
<translate>
<func class="org.apache.oodt.xmlps.mapping.funcs.ReplaceFunc" orig="1"
with="first" />
<func class="org.apache.oodt.xmlps.mapping.funcs.ReplaceFunc" orig="2"
with="second" />
</translate>
</field>
{code}
My initial impression is that we're mapping the original value (1 or 2) to the
new "with" values (first or second). With the current implementation this is
not the case. We're actually mapping "first" to 1 and "second" to 2.
I propose that we change the implementation so the attributes are easier to
understand.
[1] https://cwiki.apache.org/confluence/display/OODT/XMLPS+Quick+Start+Guide
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