Difference between revisions of "Org.eclipse.higgins.js.pds.client API usage example"

Latest revision as of 13:02, 29 September 2011

{{#eclipseproject:technology.higgins|eclipse_custom_style.css}}

We show an example of calling getAttributes and then calling setAttributes. In all cases we read/write the same two attributes in the nytimes.com namespace, bFirstName and phone.

TODO: a more realistic scenario would be showing a call to getCredentials() and then a call to setCredentials() followed by the getAttributes () and setAttributes () calls that are documented here.

Initial State

Contexts

NYTimes template

The template context http://azigo.com/sys/templates/nytimes.com contains (among other things) a class named "http://nytimes.com" that has the following mapping rules:

 :NYTimesPerson
     a       owl:Class ;
     rdfs:subClassOf <http://www.eclipse.org/higgins/ontologies/2010/6/higgins#Person> ;

rule #1:

     map:nameRule
             [ rdf:type map:rolePathLiteral ;
               map:mappedAtt <http://www.w3.org/2006/vcard/ns#given-name> ;
               map:path <http://www.w3.org/2006/vcard/ns#n> ;
               map:predicate :bFirstName ;
               map:role <http://www.eclipse.org/higgins/ontologies/2010/6/persona#Buyer>
             ] ;

rule #2:

     map:relationshipsRule
             [ rdf:type map:roleSameAs ;
               map:equivalentAttribute
                       fp:gender ;
               map:predicate :gender ;
               map:role <http://www.eclipse.org/higgins/ontologies/2010/6/persona#Ecommerce>
             ] ;

FlatPersonaPerson (relevant sections only)

rule #3:

     map:relationshipsRule
             [ rdf:type map:roleLiteral ;
               map:mappedAtt <http://xmlns.com/foaf/0.1/gender> ;
               map:predicate :gender ;
               map:role map:roleParam
             ] .

call getAttributes(domain, attributes[], where[], future)

Call

Example call to getAttributes:

• atts[0] := {id="#gender"} // gender (with nil namespace)
• atts[1] := {id="#bFirstName"} // "billing first name" (with nil namespace)
• getAttributes (future, "nytimes.com", atts[])

Execution

• context := getConnectionContext ()
  • result: context == http://azigo.com/ptrevithick/nytimes.com)
• call findRoles()
  • result:
    • [[r=p:eCommerce, a={#gender}]
    • [r=p:Buyer, a={#gender}]]
• call sortByRole()
  • result:
    • [[r=p:eCommerce, a={#gender}]
    • [r=p:Buyer, a={#gender}]]
• Try to pull attributes from #me person in the nytimes.com
  • result: no result: the nytimes.com context doesn't yet exist
• Try to pull attributes from #me person in root context
  • call findPersonByRole()
  • result: nil (no persons found that match role)
  • result: no attribute/values found

call setAttributes(future, domain, attributes[])

Call

Example call to setAttributes:

attVals[] is an array of Attributes:

• attVals[0] := {id="#gender", value=["female"])
• attVals[1] := {id=h"#bFirstName", value=["Alice"]) // "billing first name"

• setAttributes ("nytimes.com", attvals[])

Execution

• context := getConnectionContext ()
  • result: context == http://azigo.com/ptrevithick/nytimes.com
• template := getConnectionTemplate ()
  • result: template == http://azigo.com/sys/template/nytimes.com
• Since context doesn't exist, create it from template
• newPersonRole := value of role attribute of Participant ContextPrototype
  • result: newPersonRole == p:Ecommerce
• attributes[] := extractAttributes ()
  • result: attributes[] == (#gender, #bFirstName)
• rolesAtts[] := findRoles()
  • result: rolesAtts[] == [{r=["p:Ecommerce"], a=[{id=#gender}]}, {r=["p:Buyer"], a=[{id=#bFirstName}]}]
• sortByRole
  • result: rolesAtts[] == [{r=["p:Ecommerce"], a=[{id=#gender}]}, {r=["p:Buyer"], a=[{id=#bFirstName}]}]
• person := http://azigo.com/ptrevithick/nytimes.com#me
• Since person doesn't exist we create the statements:
  • (subj=:me pred=rdf:type obj=persona:Person) in context
  • (subj=:me pred=p:role obj=(newPersonRole=="p:Ecommerce")) in context
• Loop[0] ra[0]=={r=["p:Ecommerce"], a=[{id=#gender, value=["female"]}]} // Loop: For every pair ra in rolesAtts...
  • targetPersons[] := findPersonsByRole (person, "p:Ecommerce")
    • result: targetPersons[0] == <the :me person created above>; targetPersons[] is of size == 1
  • person == targetPersons[0]
  • Loop: a=={id=#gender value=["female"]}
    • rule := getRule (template=http://azigo.com/sys/template/nytimes.com, #gender)
      • result rule==(see "rule #2" in Initial State section above)
    • 0:pushEvalRule(person=:me, rule #2 above, value[0]="female")
  • EndLoop
• Loop[0] ra[0]=={r=["p:Buyer"], a=[{id=#bFirstName, value=["Alice"]}]} // Loop: For every pair ra in rolesAtts...
  • targetPersons[] := findPersonsByRole (person, "p:Buyer")
    • result: targetPersons[] is of size == 0
  • create new person and set the value of its role to p:Buyer
    • new person is :7643
  • add new person :7643 to newPersons[]
  • Loop: a=={id=#bFirstName value=["Alice"]}
    • rule := getRule (template=http://azigo.com/sys/template/nytimes.com, #bFirstName)
      • result rule==(see "rule #1" in Initial State section above)
    • 1:pushEvalRule(person=:7643, rule #1 above, value[0]="Alice")
  • EndLoop
• EndLoop
• Loop for every person np in newPersons[]
  • result: add an h:correlation link from :me to <new person>

0:pushEvalRule (:me, rule #2 above, "female")

• mappingRule := getRuleName()
  • result: mappingRule == "roleSameAs" so call pushRoleSameAs (person=:me, rule #2 above, "female")

pushRuleSameAs (template, person=:me, rule, value)

• equivAtt := getRuleField (rule, map:equivalentAttribute)
  • result: equivAtt == fp:gender
• newRule := findRule (template, eqivAtt)
  • result: returns rule #3 above!
• pushEvalRule (person=:me, newRule, "Alice") // recursion

0:0: pushEvalRule (:me, rule #3 above, "female")

• mappingRule := getRuleName()
  • result: mappingRule == "roleLiteral" so call pushRoleLiteral (person=:me, rule #3 above, "female")

pushRoleLiteral (person=:me, rule #3, "female")

• mappedAtt := getruleField()
  • result: mappedAtt == foaf:gender
• add new foaf:gender attribute to :me and sets value to "female"

1:pushEvalRule (person= :7643, rule #1 above, "Alice")

• mappingRule := getRuleField()
  • result: mappingRule == rolePathLiteral
• call pushRoleLiteral(template, 7643, rule #1, "Alice")

pushRulePathLiteral(template, 7643, rule #1, "Alice")

• path := getRuleField ()
  • result: path == "v:n"
• since :7643 doesn't have a v:n attribute then we create a v:Name object
  • result obj:= new v:Name
• mappedAtt := getRuleField ()
  • result: mappedAtt == v:given-name
• since obj is new it doesn't have a v:given-name we add v:given-name to it

Final State

Red is newly created context