public ArrayList GetCases(Case c)
{
ArrayList cases = null;
if (_env == null)
{
throw new ContextException("environment variable is not set");
}
ICBRContext ctx = CBRContextManager.GetCBRContext(_env);
if (ctx == null)
{
throw new ContextException("not set the context");
}
int type = ctx.GetCaseBaseInputType();
if (type == CaseBaseInputType.TYPE_DB ||
type == CaseBaseInputType.TYPE_FILE
)
{
ICaseBaseInput input = (ICaseBaseInput)ctx.GetCaseBaseInput();
if (input == null)
{
throw new ContextException("not set the database input");
}
cases = input.GetCases(c);
}
else
{
throw new ContextException("not support case base type");
}
return(cases);
}
public Case ReuseCase(ArrayList stats)
{
if (_env == null)
{
throw new ContextException("environment variable is not set");
}
ICBRContext ctx = CBRContextManager.GetCBRContext(_env);
if (ctx == null)
{
throw new ContextException("context is not set");
}
IMethod m = ctx.GetCaseReuseMethod();
if (m == null)
{
throw new ContextException(
"context's GetCaseRetrievalMethod is not set");
}
ctx.SetReuseCase((Case)m.Execute(stats));
return((Case)m.Execute(stats));
}
public object Execute(object obj)
{
if (_env == null)
{
throw new ContextException("environment variable is not set");
}
ICBRContext ctx = CBRContextManager.GetCBRContext(_env);
if (ctx == null)
{
//throw NoContextException
throw new ContextException("not set the context");
}
ICaseReuseStrategy strategy = ctx.GetCaseReuseStrategy();
if (strategy == null)
{
throw new ContextException(
"context CaseReuseStrategy is not set");
}
return(strategy.Reuse((ArrayList)obj));
}
public object Execute_partial(object obj, ArrayList cases)
{
if (_env == null)
{
throw new ContextException("environment variable is not set");
}
ICBRContext ctx = CBRContextManager.GetCBRContext(_env);
if (ctx == null)
{
//throw NoContextException
throw new ContextException("not set the context");
}
ICaseBase caseBase = ctx.GetCaseBase();
if (caseBase == null)
{
//throw exception
throw new ContextException("not set casebase");
}
if (cases == null || cases.Count <= 0)
{
if (Version.DEBUG)
{
System.Console.WriteLine("not found cases matched");
}
return(null);
}
//compute the similarity and sort by similarity ascending
return(ComputeSimilarity(cases, (Case)obj));
}
public void testGetCBRContext()
{
CBRContextManager.Load("engine1", path);
ICBRContext ctx = CBRContextManager.GetCBRContext("engine1"); //path);
System.Console.WriteLine(ctx.GetCaseBase().ToString());
System.Console.WriteLine(ctx.GetCaseBase().GetEnv());
System.Console.WriteLine(ctx.GetCaseBaseInput().ToString());
System.Console.WriteLine(ctx.GetCaseBaseInputType().ToString());
System.Console.WriteLine(ctx.GetCaseRestoreMethod().ToString());
System.Console.WriteLine(ctx.GetCaseRestoreMethod().GetEnv());
System.Console.WriteLine(ctx.GetCaseRetrievalMethod().ToString());
System.Console.WriteLine(ctx.GetCaseRetrievalMethod().GetEnv());
System.Console.WriteLine(ctx.GetCaseReuseMethod().ToString());
System.Console.WriteLine(ctx.GetCaseReuseMethod().GetEnv());
System.Console.WriteLine(ctx.GetCaseReuseStrategy().ToString());
System.Console.WriteLine(ctx.GetCaseReuseStrategy().GetEnv());
System.Console.WriteLine(ctx.GetSimilarity().ToString());
System.Console.WriteLine(ctx.GetSimilarity().GetEnv());
System.Console.WriteLine(ctx.GetSimilarityThrehold().ToString());
}
public ICBRContext GetCBRContext()
{
if (_env == null)
{
throw new Exception("not set environment variable of cbr context");
}
return(CBRContextManager.GetCBRContext(_name));
}
public void SetProblem(Case problem)
{
_problem = problem;
_ctx = CBRContextManager.GetCBRContext(_name);
if (_problem == null)
{
System.Console.WriteLine("problem is not set");
return;
}
_ctx.SetCurrentCase(_problem);
}
public void SetEnvironmentVariable(string env)
{
_env = env;
try
{
CBRContextManager.Load(_name, _env);
}
catch (Exception ex)
{
System.Console.WriteLine(ex.Message);
}
}
public Case ReviseCase(Case solution)
{
ICBRContext ctx = CBRContextManager.GetCBRContext(_env);
if (ctx == null)
{
throw new ContextException("context is not set");
}
ctx.SetSolutionCase(solution);
return(solution);
}
/// <summary>
/// compute the similarity of case base's cases and problem case
///
/// </summary>
/// <param name="cases"></param>
/// <param name="problem"></param>
/// <returns></returns>
public ArrayList ComputeSimilarity(ArrayList cases, Case problem)
{
if (_env == null)
{
throw new ContextException("environment variable is not set");
}
ICBRContext ctx = CBRContextManager.GetCBRContext(_env);
if (ctx == null)
{
throw new ContextException("not set context");
}
ISimilarity sim = (ISimilarity)ctx.GetSimilarity();
if (sim == null)
{
throw new ContextException("similarity method is not set");
}
ArrayList stats = new ArrayList();
double similarityThrehold = ctx.GetSimilarityThrehold();
for (int i = 0; i < cases.Count; i++)
{
Case solution = (Case)cases[i];
double similarity = sim.Compare(problem, solution);
//continue if the similarity by comparing is lower than the
//similarity threhold in context setting
if (similarity < similarityThrehold)
{
continue;
}
IStat s = StatFactory.newInstance();
s.SetCBRCase(solution);
s.SetCaseSimilarity(similarity);
//bi-sort similarity
if (stats.Count <= 0)
{
stats.Add(s);
continue;
}
SortSimilarity(stats, s);
}
return(stats);
}
public bool Startup()
{
if (_env == null ||
CBRContextManager.GetCBRContext(_name) == null)
{
System.Console.WriteLine("environment is not set or context is null");
return(false);
}
_ctx = CBRContextManager.GetCBRContext(_name);
if (_problem == null)
{
System.Console.WriteLine("problem is not set");
return(false);
}
_ctx.SetCurrentCase(_problem);
#region only for test
if (Version.DEBUG)
{
System.Console.WriteLine("=====context detail=====");
System.Console.WriteLine("Reasoning Engine startup successfully!");
System.Console.WriteLine("problem case is:");
for (int i = 0; i < _problem.GetFeatures().Count; i++)
{
Feature f = (Feature)_problem.GetFeatures()[i];
System.Console.WriteLine("\t" + f.GetFeatureName() + ":" + f.GetFeatureValue());
}
System.Console.WriteLine("context is:");
System.Console.WriteLine("case base\t" + _ctx.GetCaseBase().ToString());
System.Console.WriteLine("case base input\t" + _ctx.GetCaseBaseInput().ToString());
System.Console.WriteLine("case base input type\t" + _ctx.GetCaseBaseInputType().ToString());
System.Console.WriteLine("case base url\t" + _ctx.GetCaseBaseURL().ToString());
System.Console.WriteLine("case restore method\t" + _ctx.GetCaseRestoreMethod().ToString());
System.Console.WriteLine("case retrieval method\t" + _ctx.GetCaseRetrievalMethod().ToString());
System.Console.WriteLine("case reuse method\t" + _ctx.GetCaseReuseMethod().ToString());
System.Console.WriteLine("case reuse strategy\t" + _ctx.GetCaseReuseStrategy().ToString());
System.Console.WriteLine("case revise method\t" + _ctx.GetCaseReviseMethod().ToString());
System.Console.WriteLine("current case\t" + _ctx.GetCurrentCase().ToString());
System.Console.WriteLine("similarity\t" + _ctx.GetSimilarity().ToString());
System.Console.WriteLine("similarity threhold\t" + _ctx.GetSimilarityThrehold().ToString());
System.Console.WriteLine("=====end of context detail=====");
}
#endregion
return(true);
}
public Case Reuse(ArrayList stats)
{
if (stats == null || stats.Count <= 0)
{
return(null);
}
if (_env == null)
{
throw new ContextException("environment variable is not set");
}
ICBRContext ctx = CBRContextManager.GetCBRContext(_env);
if (ctx == null)
{
throw new ContextException("context is not set");
}
Case problem = ctx.GetCurrentCase();
Case c = ((IStat)(stats[0])).GetCBRCase();
if (c != null && problem != null)
{
ArrayList features = c.GetFeatures();
for (int i = 0; i < features.Count; i++)
{
Feature f = (Feature)features[i];
//if the feature is the key of problem
if (f.GetIsKey())
{
problem.ModifyFeature(f.GetFeatureName(),
f.GetFeatureType(), f.GetFeatureValue(),
f.GetWeight(), f.GetIsKey(),
f.GetIsIndex());
}
}
return(problem);
}
return(null);
}
public Case Reuse(System.Collections.ArrayList stats)
{
if (stats == null || stats.Count <= 0)
{
return(null);
}
if (_env == null)
{
throw new ContextException("environment variable is not set");
}
ICBRContext ctx = CBRContextManager.GetCBRContext(_env);
if (ctx == null)
{
throw new ContextException("ctx is not set");
}
Case problem = ctx.GetCurrentCase();
if (problem == null)
{
throw new ContextException(
"interface ICBRContext's GetCurrentCase return null");
}
ArrayList list = problem.GetFeatures();
for (int i = 0; i < list.Count; i++)
{
Feature f = (Feature)list[i];
if (f.GetIsKey() && TypeHandle.IsNumericFeature(f))
{
//compute the mean value of features
f.SetFeatureValue(ComputeMeanValue(stats,
f.GetFeatureName()));
}
}
return(problem);
}
public string ParseConditions(string src)
{
if (src == null ||
src.Trim().Length <= 0)
{
return(null);
}
string dst = src;
ICBRContext ctx = CBRContextManager.GetCBRContext(_env);
Case c = ctx.GetCurrentCase();
ArrayList features = c.GetFeatures();
foreach (Feature f in features)
{
string name = TOKEN_SHARP + f.GetFeatureName() + TOKEN_SHARP;
if (f.GetFeatureValue() != null)
{
dst = dst.Replace(name, f.GetFeatureValue().ToString());
}
}
return(dst);
}
public ArrayList RetrievalCases_partial(Case problem, ArrayList testingcases)
{
if (_env == null)
{
throw new ContextException("environment variable is not set");
}
ICBRContext ctx = CBRContextManager.GetCBRContext(_env);
if (ctx == null)
{
throw new ContextException("context is not set");
}
IMethod m = ctx.GetCaseRetrievalMethod();
if (m == null)
{
throw new ContextException(
"context's GetCaseRetrievalMethod is not set");
}
ctx.SetMatchedCase((ArrayList)m.Execute_partial(problem, testingcases));
return((ArrayList)m.Execute_partial(problem, testingcases));
}
/// <summary>
/// find case from case base
/// return null if not suitable case
/// otherwise retrurn case list
/// note that only *.ocbr and db type are supported
/// </summary>
/// <param name="c"></param>
/// <returns></returns>
public ArrayList GetCases(Case c)
{
if (_env == null)
{
System.Console.WriteLine("environment is not set");
return(null);
}
ICBRContext ctx = CBRContextManager.GetCBRContext(_env);
if (ctx == null)
{
throw new ContextException("context is null");
}
int type = ctx.GetCaseBaseInputType();
string url = ctx.GetCaseBaseURL();
if (type == CaseBaseInputType.TYPE_FILE)
{
IOCBRFile file = OCBRFileFactory.newInstance(url);
return(file.GetCases());
}
else if (type == CaseBaseInputType.TYPE_DB)
{
IDb db = DbFactory.newInstance(url);
db.SetEnv(_env); //set the conditions rules
return(db.GetCases());
}
else
{
System.Console.WriteLine("input case base type unsupported");
}
return(null);
}
