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How-To Create a Session
How-To Create a Session

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At line 1 changed one line
!!! Running a d3web Case Session
[{TableOfContents }]
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Once, you have created a {{KnowledgeBase}} instance (for example, by [Loading a knowledge base]), you can run a problem-solving session.
During a problem-solving session you enter Question-Value pairs (facts) and the system will derive appropriate solutions for the entered facts.
!!! Running a d3web [Session|https://isci.informatik.uni-wuerzburg.de/javadoc/d3web/de/d3web/core/session/Session.html]
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!! Creating a new Case Session
Once, you have created a [KnowledgeBase|https://isci.informatik.uni-wuerzburg.de/javadoc/d3web/de/d3web/core/knowledge/KnowledgeBase.html] instance (for example, by [Loading a knowledge base|How-To Load a Knowledge Base]), you can run a problem-solving session.
During a problem-solving session you enter Question-Value pairs ([Fact|https://isci.informatik.uni-wuerzburg.de/javadoc/d3web/de/d3web/core/session/blackboard/Fact.html]) and the system will derive appropriate solutions for the entered facts.
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Case sessions are represented by instances of {{Session}}.
Use the {{SessionFactory}} to quickly create a new {{Session}} instance for the {{KnowledgeBase}} instance with name {{knowledgeBase}}:
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!! Creating a new Session
Sessions are represented by instances of {{Session}}.
Use the {{SessionFactory}} to quickly create a new {{Session}} instance for the {{KnowledgeBase}} instance:
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The {{Interview}}, instantiated with the Session, determines the next question to be presented to the user. More precisely, a {{FormStrategy}} computes the next {{From}} that is presented in the dialog.
A Form consists of a title and an {{interviewObject}} (a Question of a QContainer):
The [Interview|https://isci.informatik.uni-wuerzburg.de/javadoc/d3web/de/d3web/core/session/interviewmanager/Interview.html], which can be accessed from the session by using the interview problem solver (PSMethod), determines the next question to be presented to the user. More precisely, a {{FormStrategy}} computes the next {{From}} that is presented in the dialog.
A Form consists of a title and a list of active questions:
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Form form = session.getInterview().nextForm();
InterviewObject interviewObject = form.getInterviewObject();
Interview interview = session.getSessionObject(session.getPSMethodInstance(PSMethodInterview.class));
Form form = interview.nextForm();
List<Question> activeQuestions = form.getActiveQuestions();
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session.getInterviewManager().setFormStrategy(new NextUnansweredQuestionFormStrategy());
interview.setFormStrategy(new NextUnansweredQuestionFormStrategy());
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Fact fact = FactFactory.createFact(question, value,
PSMethodUserSelected.getInstance(),
PSMethodUserSelected.getInstance());
Question question = kb.getManager().searchQuestion("QuestionName");
ChoiceValue value = new ChoiceValue("ChoiceName");
Fact fact = FactFactory.createFact(session, question, value,
PSMethodUserSelected.getInstance(),
PSMethodUserSelected.getInstance());
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for (Solution solution : knowledgeBase.getSolutions()) {
Rating state = session.getBlackboard().getState(solution);
for (Solution solution : knowledgeBase.getManager().getSolutions()) {
Rating state = session.getBlackboard().getRating(solution);
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Sometimes it is easier (and a bit faster) to just get all solutions in a particular state, e.g. all established solutions:
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%%prettify
{{{
out.println("All established solutions:");
for (Solution solution : session.getBlackboard().getSolutions(Rating.State.ESTABLISHED)) {
out.println(solution);
}
}}}
/%
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Please note, that the session manages a {{Protocol}}, where all entered findings (question/value tuples) are stored in a chronological order.
Please note, that the session manages a {{Protocol}}, where entered findings (question/value tuples) are stored in a chronological order.
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// Create a case (problem-solving session and set all specified
// question/answers
// Create a case (problem-solving session and set
// all specified question/answers
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Fact fact1 = FactFactory.createFact(pregnant, yes, PSMethodUserSelected
.getInstance(), PSMethodUserSelected.getInstance());
Fact fact1 = FactFactory.createUserEnteredFact(
pregnant, yes);
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Fact fact2 = FactFactory.createFact(weight, new NumValue(80),
PSMethodUserSelected.getInstance(),
PSMethodUserSelected.getInstance());
Fact fact2 = FactFactory.createUserEnteredFact(
weight, new NumValue(80));
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for (Solution solution : knowledgeBase.getSolutions()) {
Rating state = session.getBlackboard().getState(solution);
if (!state.hasState(Rating.State.UNCLEAR))
for (Solution solution : knowledgeBase.getManager().getSolutions()) {
Rating state = session.getBlackboard().getRating(solution);
if (!state.hasState(Rating.State.UNCLEAR)) {
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}
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// - pregnant [oc]
// - weight [num]
// -- pregnant [oc]
// -- weight [num]
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KnowledgeBaseManagement kbm = KnowledgeBaseManagement.createInstance();
QASet root = kbm.getKnowledgeBase().getRootQASet();
KnowledgeBase kb = KnowledgeBaseUtils.createKnowledgeBase();
QASet root = kb.getRootQASet();
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demoQuestions = kbm.createQContainer("demoQuestions", root);
pregnant = kbm.createQuestionOC("pregnant", demoQuestions, new String[] { "yes",
"no" });
yes = new ChoiceValue(kbm.findChoice(pregnant, "yes"));
weight = kbm.createQuestionNum("weight", "weight", demoQuestions);
demoQuestions = new QContainer(root, "demoQuestions");
pregnant = new QuestionOC(demoQuestions, "pregnant", "yes", "no");
yes = new ChoiceValue(KnowledgeBaseUtils.findChoice(pregnant, "yes"));
weight = new QuestionNum(demoQuestions, "weight");
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dangerousMood = kbm.createSolution("dangerousMood");
dangerousMood = new Solution(kb.getRootSolution(), "dangerousMood");
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kbm.getKnowledgeBase().setInitQuestions(Arrays.asList(demoQuestions));
// Define the magic rule: preganant=yes AND weight > 70 => dangerousMood (P7)
kb.setInitQuestions(Arrays.asList(demoQuestions));
// Define the magic rule: preganant=yes AND weight > 70 => dangerousMood
// (P7)
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terms.add(new CondNumGreater(weight, Double.valueOf(70)));
RuleFactory.createHeuristicPSRule("r1", dangerousMood, Score.P7, new CondAnd(terms));
return kbm.getKnowledgeBase();
terms.add(new CondNumGreater(weight, (double) 70));
RuleFactory.createHeuristicPSRule(dangerousMood, Score.P7, new CondAnd(terms));
return kb;
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howto
howto create Session
This page (revision-16) was last changed on 06-Jun-2017 09:17 by Albrecht Striffler Top