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From "Dean Holdren (JIRA)" <j...@apache.org>
Subject [jira] Created: (AXIS2-4859) Optional "Ignore Unexpected Elements" mode - allows for forward-compatible clients
Date Wed, 20 Oct 2010 18:38:23 GMT
Optional "Ignore Unexpected Elements" mode - allows for forward-compatible clients
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                 Key: AXIS2-4859
                 URL: https://issues.apache.org/jira/browse/AXIS2-4859
             Project: Axis2
          Issue Type: New Feature
          Components: codegen
    Affects Versions: 1.5.2, 1.6, 1.5.3
            Reporter: Dean Holdren


Problem: Service provider adds an optional element to the responses it sends, assuming client
can handle, while client is unaware and has not (or cannot) retrieve updated WSDL and regenerate
client.  Axis2 client generated with ADB, cannot handle and throws an exception.

Solution:
Optional "Ignore Unexpected Elements" mode for wsdl2java using adb - allows for forward-compatible
clients that can recover from unxpected elements in service responses.
Based on the work in Issue 3037 - This patch is more up to date, is for both trunk and 1_5
branch, handles more scenarios, and will correctly parse the portion of the response after
the unexpected element.

To use, pass the "-Eiu" parameter to wsdl2java

Handles the following scenarios:
1) unexpected element in a xsd:choice, xsd:any, xsd:all
2) appended unexpected element in a xsd:sequence.

For xsd:sequence, the unexpected element, and subsequent elements within that sequence are
not captured. If a service adds a new element within a sequence, it should be *appended*,
as the generated client is strict with ordering, and can't differentiate an out-of-order sequence
from an additional inserted element.



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