I want to cast some OWL-S conditions to SWRL, the cast is done but the result manipulation returns nullpointerexception. Here the code :
final OWLIndividualList<Condition> cs = service.getProfile().getConditions();
final ArrayList<ArrayList<URI>> conditions = new ArrayList<ArrayList<URI>>();
for (final Condition<?> c : cs){
if (c.canCastTo(Condition.SWRL.class)){ // is it a SWRL condition?
final Condition.SWRL sc = c.castTo(Condition.SWRL.class);
for (final Atom a : sc.getBody()){...........
the last line returns :
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
Can anyone help me to deal with this?
This issue is not linked to the java code but to the OWLS-S file syntaxe.
you can resolve this issue by replacing:
<expr:expressionBody rdf:parseType="Literal">
which hold the SWRL precondition (or eventually the result), by:
<expr:expressionObject>
Related
While testing the pipeline I got this error even the error log shows that the objects are equal:
public void testGenerateUserPageViews() throws Exception{
final PCollection<SessionModel> input = p.apply(Create.of(SESSION_MODEL));
final PCollection<UserPageViews> output = input.apply(ParDo.of(new GenerateUserPageViews()));
PAssert.that(output).containsInAnyOrder(USER_PAGEVIEWS);
p.run().waitUntilFinish();
}
java.lang.AssertionError: ParDo(GenerateUserPageViews)/ParMultiDo(GenerateUserPageViews).output:
Expected: iterable over [<com.userprofile.models.UserPageViews#e1688b19>] in any order
but: Not matched: <com.userprofile.models.UserPageViews#e1688b19>
at org.apache.beam.sdk.testing.PAssert$PAssertionSite.capture(PAssert.java:174)
at org.apache.beam.sdk.testing.PAssert.that(PAssert.java:416)
at org.apache.beam.sdk.testing.PAssert.that(PAssert.java:408)
at
I would guess that com.userprofile.models.UserPageViews does not have a fully implemented equals or hashCode method.
The solution is that I replace String variable with "" value in place of null. But I still don't understand why the object reference are the same in both cases.
I try
#Test
public void testGetSingleUser() {
given().expect().
statusCode(200).contentType(ContentType.JSON).
body("_testingString", equalTo("got it")).when().
get("http://localhost:8080/getIt");
}
But always got this error message
java.lang.AssertionError : JSON path _testingString dosen't match.
Expected : "got it" got : [got it]
how to ignore "" and [] problem
Thanks
Note: This is untested code snippet but while looking at your error trace it may help you.
try
equalTo(Arrays.asList("got it"))
instead of
equalTo("got it")
When you receive a error saying, same like that:
JSON path total doesn't match.
Expected: 2000
Actual: <[2000]>
It means that your result(Actual:) is coming inside an array.
Hence, you should use a rest-assured-command(for example, hasItem) that verifies values 'inside an array'.
My code below illustrate a solution for this situation:
RestAssuredWebTestClient
.given()
.webTestClient(mockedWebClient)
.queryParam("cost", 1000)
.when()
.get(TEMPL_AGGREG_DATE)
.then()
.log()
.everything()
.statusCode(OK.value())
.body("_id", hasItem(project2.getStartDate()))
.body("total", hasItem((int)project2.getEstimatedCost()))
.body(matchesJsonSchemaInClasspath("contracts/aggregations/CostsGroupByStartDate.json"))
;
I'm trying to fix the following VBA statement (converting some old code just for fun and to learn Roslyn, not at all looking for anything perfect) to remove the Set keyword so it's a valid VB.NET statement:
Set f = New Foo()
When I look at it through the Syntax Visualizer, I see it turns into trailing trivia.
I'm trying to figure out how to find it using a query. I tried several approaches but all of the following came up empty:
var attempt1 = root.DescendantTokens().Where(t=>t.IsKind(SyntaxKind.SkippedTokensTrivia));
var attempt2 = root.DescendantTokens().Where(t => t.IsKind(SyntaxKind.SetKeyword));
var attempt3 = root.DescendantTrivia().Where(t => t.IsKind(SyntaxKind.SetKeyword));
var attempt4 = root.DescendantNodes()
.OfType<EmptyStatementSyntax>()
.Where(e => e.DescendantTokens().Any(t => t.IsKeyword()));
(Yes, I'm using C# to work with a VisualBasicSyntaxTree)
I can't seem to just find the SetKeyword token that appears in the visualizer, so I thought maybe it's doing some more heavy lifting to piece together what it really is (is that what's meant by structured trivia?). I read something in the documentation that mentioned the compiler can choose to represent it a couple of different ways, so I thought that may be what's going on here.
The query was just the first thing I tried, but in reality I have a SyntaxRewriter I'm using to visit the code to find and fix all such problems (I'm already able to fix missing parentheses around ArgumentLists, for example) but in this case I can't seem to figure out which Visit method to override.
So again, 1) how to query for these from the root and 2) the best override to select from a rewriter. I've been beating my face on the keyboard for two days on this which exponentially increases the likelihood that I'm having a cranio/recto-insertion moment and I need one of you kind souls to pull me out of it.
Cheers!
Brian
Edit: Fixed typo in query attempt1
So it appears that when the compiler reaches an error condition, it will skip all tokens up to the next point where it can recover and continue parsing (the end of the line in this case). The node representing this error condition is an EmptyStatement with trailing syntax trivia containing the rest of the text as parsed tokens.
So if you're going to rewrite a node, you'll want to rewrite EmptyStatements. But you don't want to write just any empty statement, just the ones with the "BC30807" diagnostic code.
public override SyntaxNode VisitEmptyStatement(EmptyStatementSyntax node)
{
var diagnostic = GetLetSetDiagnostic(node);
if (diagnostic == null)
return base.VisitEmptyStatement(node);
return RewriteLetSetStatement(node);
}
private Diagnostic GetLetSetDiagnostic(EmptyStatementSyntax node)
{
//'Let' and 'Set' assignment statements are no longer supported.
const string code = "BC30807";
return node.GetDiagnostics().SingleOrDefault(n => n.Id == code);
}
The implementation of the RewriteLetSetStatement() method is a bit of a mystery to me, I'm not sure how it can be implemented utilizing the compiler services effectively, I don't think that this is a use case that it covers well. The trivia retains the parsed tokens, but there's not much you can do with those tokens AFAIK.
Ideally, we'd just want to ignore the Set token from the tokens and throw it back into the parser to be reparsed. And as far as I can tell, that's not possible, we can only parse from text.
So, I guess the next best thing to do would be to take the text, rewrite it to remove the Set and parse the text again.
private SyntaxNode RewriteLetSetStatement(EmptyStatementSyntax node)
{
var letSetTokens = node.GetTrailingTrivia()
.Where(triv => triv.IsKind(SyntaxKind.SkippedTokensTrivia))
.SelectMany(triv => triv.GetStructure().ChildTokens())
.TakeWhile(tok => new[] {SyntaxKind.LetKeyword, SyntaxKind.SetKeyword}
.Contains(tok.VisualBasicKind()));
var span = new RelativeTextSpan(node.FullSpan);
var newText = node.GetText().WithChanges(
// replacement spans must be relative to the text
letSetTokens.Select(tok => new TextChange(span.GetSpan(tok.Span), ""))
);
return SyntaxFactory.ParseExecutableStatement(newText.ToString());
}
private class RelativeTextSpan(private TextSpan span)
{
public TextSpan GetSpan(TextSpan token)
{
return new TextSpan(token.Start - span.Start, token.Length);
}
}
I have an entity Person with fields String name and String designation. When I tried to query using Eclipselink ExpressionBuilder, as:
Project project=new Project();
Login login=new DatabaseLogin();
login.setUserName("root");
login.setPassword("root");
project.setLogin(login);
DatabaseSession session=project.createDatabaseSession();
ExpressionBuilder expBuilder=new ExpressionBuilder();
Expression expression=expBuilder.get("name").equalsIgnoreCase("SomeName");
Vector readAllObjects = session.readAllObjects(Person.class, expression);
On executing last statement the following exception is thrown :
Exception [EclipseLink-6007] (Eclipse Persistence Services - 2.3.2.v20111125-r10461): org.eclipse.persistence.exceptions.QueryException
Exception Description: Missing descriptor for [class com.mycompany.entity.Person].
Query: ReadAllQuery(referenceClass=Person)
What might be the reason? Thanks in advance...
At last I got it. Instead of DatabaseSession, org.eclipse.persistence.sessions.server.ClientSession had to be used.
JpaEntityManager jpaEntityManager=em.unwrap(JpaEntityManager.class);
ClientSession session=jpaEntityManager.getServerSession().acquireClientSession();
ExpressionBuilder expBuilder=new ExpressionBuilder();
Expression expression=expBuilder.get("name").equalsIgnoreCase("SomeName");
Vector readAllObjects = session.readAllObjects(Person.class, expression);
em is the EntityManager.
This solved the issue.
You did not add a descriptor for Person. You need to map it to be able to query it.
Also consider using JPA.
I am testing subsonic 3, i can query my database but when i am inserting a record i have an exception. Here is my code:
Client lClient = new Client();
lClient.Name = "Peter";
lClient.FullName = "Richards";
lCliente.Save();
And i have a null reference exception on this generated code:
var newKey=_repo.Add(this,provider);
Any help is appreciated.
I am using ActiveRecords
I had a similar problem, with code not unlike the following:
var pending = myTable.SingleOrDefault(x => x.Id == 1);
if (pending == null)
pending = new myTable();
pending.Id = 1;
pending.MyDate = DateTime.Now;
pending.MyString = someString;
pending.Save();
This worked the first time I ran it, on an empty table, but not the second time when updating. I got a nullreference exception somewhere inside the subsonic repository. The solution was to add a primary key, as Rob suggested.
Just thought I'd mention it (thanks Rob).
Where does the null reference exception actually happen? Is _repo null?
Try and double check that you don’t have any columns in the “Client” table which are not nullable and you don’t set any value.
Also make sure you PK is handled correctly (check you have the [Property.IsForeignKey=true;] attribute)
Do you have NullReferenceException Checked in (file menu) Debug -> Exceptions (press Find and type NullReferenceException, press OK)?
I downloaded the SubSonic code and used it as reference for my project, the exception is thrown in SubSonic.Core\Repository\SubSonicRepository.cs:209 because prop is not checked for null at line 208, and any exceptions are swallowed as evidenced by line 213.
What happens is visual studio breaks on all the exceptions checked in the mentioned dialog. So in one way, this is the expected behaviour from the code.
What actually causes prop to become null, in my case, the table field name is lower-case, but the property is actually cased properly.
From Immediate:
tbl.PrimaryKey.Name
"playerinformationid"
item.GetType().GetProperties()
{System.Reflection.PropertyInfo[11]}
[0]: {System.Collections.Generic.IList`1[SubSonic.Schema.IColumn] Columns}
// *snip*
[5]: {Int32 PlayerInformationid}
// *snip*
item.GetType().GetProperty("PlayerInformationid")
{Int32 PlayerInformationid} // Works!
item.GetType().GetProperty(tbl.PrimaryKey.Name)
null
I hacked this together to "just make it work" (Warning: newbie at 3.5 stuff)
-var prop = item.GetType().GetProperty(tbl.PrimaryKey.Name);
+var lowerCasedPrimaryKeyName = tbl.PrimaryKey.Name.ToLowerInvariant();
+var prop = item.GetType().GetProperties().First<System.Reflection.PropertyInfo>(x => x.Name.ToLowerInvariant() == lowerCasedPrimaryKeyName);
Does your table have a PrimaryKey? It doesn't sound like it does. If not - this is your problem.