This text file contains sample code fragments from:
Section 17.4 - Intersection and Consumer-Service Policy Compatibility
Chapter 17 - Advanced WS-Policy Part II: Custom Policy Assertion Design, Runtime Representation, and Compatibility
Book - Web Service Contract Design & Versioning for SOA
Series - Prentice Hall Service-Oriented Computing Series from Thomas Erl
Site - www.soabooks.com


<wsp:Policy>
  <wsam:Addressing><wsp:Policy/></wsam:Addressing>
</wsp:Policy>

Example 17.21 - A policy expression provided by the consumer containing the wsam:Addressing policy assertion.


<wsp:Policy>
  <wsp:ExactlyOne>
    <wsp:All>
      <ex:Assertion1/>
      <ex:Assertion2/>
      <ex:Assertion3>
    </wsp:All>
    <wsp:All>
      <ex:Assertion4/>
      <ex:Assertion5/>
      <ex:Assertion6>
    </wsp:All>
  </wsp:ExactlyOne>
</wsp:Policy>

Example 17.22 - The policy alternative provided by the Web service contract.


<wsp:Policy>
  <wsp:ExactlyOne>
    <wsp:All>
      <ex:Assertion7/>
      <ex:Assertion4/>
      <ex:Assertion8/>
    </wsp:All>
    <wsp:All>
      <ex:Assertion2/>
      <ex:Assertion1/>
      <ex:Assertion3/>
    </wsp:All>
  </wsp:ExactlyOne>
</wsp:Policy>

Example 17.23 - The policy alternative provided by the consumer program designer.


<wsp:Policy>
  <wsp:ExactlyOne>
    <wsp:All>
      <ex:Assertion1/>
      <ex:Assertion2/>
      <ex:Assertion3/>
      <ex:Assertion2/>
      <ex:Assertion1/>
      <ex:Assertion3/>
    </wsp:All>
  </wsp:ExactlyOne>
</wsp:Policy>

Example 17.24 - The results of carrying out the intersection algorithm on the previous two examples.


<wsp:Policy>
  <wsp:ExactlyOne>
    <wsp:All>
      <ex:Assertion1/>
      <ex:Assertion2/>
      <ex:Assertion3/>
    </wsp:All>
  </wsp:ExactlyOne>
</wsp:Policy>

Example 17.25 - After some editing, the three compatible policy assertions are clearly displayed.