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Posted to users@jena.apache.org by Ashwani Rathi <as...@oracle.com> on 2020/01/16 03:14:14 UTC
Issues while upgrading to Jena-2.13.0 from version 2.8.8
Hi,
Thanks for pointing it out.
Yes we are not upgrading to jena 3 now as the package structure in jena 3 is very different from jena 2. So we decided to first upgrade to jena version 2.13.0
Current jena version in our project is 2.8.8
Other details provided in the previous mail are same.
We are getting the two issues mentioned in the mail below while trying to upgrade to jena version 2.13.0
Can you please help in finding out what is the issue here?
Regards,
Ashwani
On 15/01/20, 8:32 PM, "ajs6f" <aj...@apache.org> wrote:
I'm a little confused. You say you are trying to use Jena 3, but that stacktrace features com.hp.hpl.jena.sdb package names, which are from Jena 2. Which one is executing this code? Are you bringing both on to the classpath together somehow?
ajs6f
> On Jan 15, 2020, at 7:09 AM, Ashwani Rathi <as...@oracle.com> wrote:
>
> Hi All,
> As discussed, I am trying to make changes in our java cod to migrate from jena 2 to jena 3
>
> private Model getModelFromRDFStore(String modelName, java.sql.Connection conn)
> {
> org.apache.jena.sdb.StoreDesc storeDesc = new org.apache.jena.sdb.StoreDesc(org.apache.jena.sdb.store.LayoutType.LayoutTripleNodesIndex,
> org.apache.jena.sdb.store.DatabaseType.Oracle) ;
> org.apache.jena.sdb.Store store = null;
> try {
> store = org.apache.jena.sdb.SDBFactory.connectStore(conn, storeDesc);
> if(!StoreUtils.isFormatted(store))
> {
> store.getTableFormatter().create();
> }
> } catch (java.sql.SQLException e) {
> e.printStackTrace();
> }
> org.apache.jena.query.Dataset dataset = org.apache.jena.sdb.SDBFactory.connectDataset(store);
> Model model = null;
> if (!dataset.containsNamedModel(modelName)) {
> model = dataset.getDefaultModel();
> dataset.addNamedModel(modelName, model);
> }
> else {
> model = dataset.getNamedModel(modelName);
> }
>
> store.getConnection().close();
> store.close();
> System.out.println("############### RETURNING model ===== " + model);
> return model;
> }
>
> But I am getting the following issues
>
> 1) While printing the model (System.out.println("############### RETURNING model ===== " + model);), I am getting the following SQLException:
>
> <Jan 15, 2020 3:18:45,779 AM PST> <Error> <oracle.bpm.barch.reports.services.repository.rdfimpl> <BEA-000000> <<[Thread - [ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)' ]null.null> com.hp.hpl.jena.sdb.sql.SDBExceptionSQL: SQLException in executing SQL statement
> at com.hp.hpl.jena.sdb.compiler.SDB_QC.exec(SDB_QC.java:84)
> at com.hp.hpl.jena.sdb.compiler.OpSQL.exec(OpSQL.java:65)
> at com.hp.hpl.jena.sdb.engine.QueryEngineSDB.eval(QueryEngineSDB.java:154)
> at com.hp.hpl.jena.sparql.engine.QueryEngineBase.evaluate(QueryEngineBase.java:137)
> at com.hp.hpl.jena.sparql.engine.QueryEngineBase.createPlan(QueryEngineBase.java:107)
> at com.hp.hpl.jena.sparql.engine.QueryEngineBase.getPlan(QueryEngineBase.java:88)
> at com.hp.hpl.jena.sdb.engine.QueryEngineSDB$QueryEngineFactorySDB.create(QueryEngineSDB.java:198)
> at com.hp.hpl.jena.sdb.graph.GraphSDB.graphBaseFind(GraphSDB.java:169)
> at com.hp.hpl.jena.graph.impl.GraphBase.find(GraphBase.java:277)
> at com.hp.hpl.jena.graph.GraphUtil.findAll(GraphUtil.java:123)
> at com.hp.hpl.jena.graph.impl.GraphBase.toString(GraphBase.java:436)
> at com.hp.hpl.jena.graph.impl.GraphBase.toString(GraphBase.java:411)
> at java.lang.String.valueOf(String.java:2981)
> at java.lang.StringBuilder.append(StringBuilder.java:131)
> at com.hp.hpl.jena.rdf.model.impl.ModelCom.toString(ModelCom.java:1506)
> at java.lang.String.valueOf(String.java:2981)
> at java.lang.StringBuilder.append(StringBuilder.java:131)
>
> 2) We are fetching model data from database, but I am not getting any details in the fetched model object. Is something missing in this logic?
>
> Regards,
> Ashwani
>
> On 10/01/20, 4:14 PM, "Andy Seaborne" <an...@apache.org> wrote:
>
> Probably has not been formatted:
>
>
>
> https://urldefense.proofpoint.com/v2/url?u=http-3A__jena.apache.org_documentation_sdb_javaapi.html-23formatting-2Dor-2Demptying-2Dthe-2Dstore&d=DwIDaQ&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=ld8gXdwUlVansMT0flGoGNN0AOkhQba_hAJM5PewJCA&m=xMdWwv3NfQf8eKJO6IDGzidz0u7zt4EiZ0x6jeuB5WI&s=2bL8SFjE2-I7Ooz_b_k_V2x6t7R7hn50CNfPrVbF99A&e=
>
>
>
>
>
> On 10/01/2020 02:20, Ashwani Rathi wrote:
>
>> Hi All,
>
>> As discussed, I am trying to migrate from Jena 2 to Jena 3. As part of that we are trying to eliminate usage of com.hp.hpl.jena.db.IDBConnection and rather use org.apache.jena.sdb.sql.SDBConnection
>
>> Following is the method that we have written to get org.apache.jena.rdf.model.Model object from database
>
>>
>
>> private Model getModelFromRDFStore(String modelName, java.sql.Connection conn)
>
>> {
>
>> org.apache.jena.sdb.StoreDesc storeDesc = new org.apache.jena.sdb.StoreDesc(org.apache.jena.sdb.store.LayoutType.LayoutTripleNodesIndex,
>
>> org.apache.jena.sdb.store.DatabaseType.Oracle) ;
>
>> org.apache.jena.sdb.Store store = null;
>
>> try {
>
>> store = org.apache.jena.sdb.SDBFactory.connectStore(conn, storeDesc);
>
>> } catch (java.sql.SQLException e) {
>
>> e.printStackTrace();
>
>> }
>
>> org.apache.jena.query.Dataset dataset = org.apache.jena.sdb.SDBFactory.connectDataset(store);
>
>> Model model = null;
>
>> if (!dataset.containsNamedModel(modelName)) {
>
>> model = dataset.getDefaultModel();
>
>> dataset.addNamedModel(modelName, model);
>
>> }
>
>> else {
>
>> model = dataset.getNamedModel(modelName);
>
>> }
>
>> return model;
>
>> }
>
>>
>
>> But while checking for model in a dataset -> (!dataset.containsNamedModel(modelName)), we are getting the following error:
>
>> Caused by: java.sql.SQLSyntaxErrorException: ORA-00942: table or view does not exist
>
>>
>
>> Attached is the detailed exception. From the log it seems that some tables like Nodes N_1, Quads Q_1 , Nodes R_1, Nodes R_2 are missing.
>
>> So can anyone please tell what all tables (with columns) should we create to fix this issue?
>
>>
>
>> Regards,
>
>> Ashwani
>
>>
>
>>
>
>>
>
>> On 09/01/20, 8:07 PM, "Andy Seaborne" <an...@apache.org> wrote:
>
>>
>
>> Hi Ashwani,
>
>>
>
>> What are you trying to achieve overall?
>
>>
>
>> Is it to port an existing application/system from Jena 2.6 to Jena
>
>> 3.current?
>
>> Or is it create a general adaptor for Jena to Oracle Spatial RDF?
>
>>
>
>> The answers to your questions are different depending on use case.
>
>>
>
>> If it is the latter, then going down the SDB route may lead to a whole host
>
>> of problems because SDB is not deeply integrated into Jena anymore. For
>
>> example: transactions (and integration with Fuseki will be hard), newer
>
>> APIs like RDFConnection. You want to implement DatasetGraph and
>
>> Transactional. I doubt the database framework DBOE helps much but it is
>
>> worth checking that to see if it will save you work.
>
>>
>
>> If it is a one-off conversion for a specific application, things are
>
>> simpler because it's getting something to work for one, known case rather
>
>> arbitrary application use cases in the future and as Jena evolves.
>
>> ------------
>
>> Re: SDBConnection
>
>>
>
>> SDBConnection does not control the table naming. That's in the "FmtLayout"
>
>> classes.
>
>>
>
>> Re:LayoutType
>
>>
>
>> See the source code.
>
>> SDB uses one of three fixed table layouts. layout1 (really, *really* don't
>
>> use), layout2/index and layout2/hash.
>
>>
>
>> The SPARQL to SQL code generation is specific to the layout.
>
>>
>
>>
>
>> On Thu, 9 Jan 2020 at 12:24, Ashwani Rathi <as...@oracle.com> wrote:
>
>>
>
>>> Thanks for the reply.
>
>>>
>
>>> Also in jena 2, we can set TableNamePrefix on an IDBConnection with the
>
>>> following statements:
>
>>>
>
>>> IDBConnection conn = null;
>
>>> IRDBDriver driver = conn.getDriver();
>
>>> driver.setTableNamePrefix("prefix");
>
>>>
>
>>> So what actually does this achieve. And how can we achieve the same
>
>>> functionality in jena 3 with org.apache.jena.sdb.sql.SDBConnection class?
>
>>>
>
>>> Regards,
>
>>> Ashwani
>
>>>
>
>>> On 09/01/20, 2:15 PM, "Bögershausen, Merlin Michael" <
>
>>> merlin.boegershausen@rwth-aachen.de> wrote:
>
>>>
>
>>> Hi,
>
>>>
>
>>> You can check whether the dataset contains a specific named model with
>
>>> dataset.containesNamedModel() [1]
>
>>>
>
>>>
>
>>>
>
>>> Best Merlin
>
>>>
>
>>>
>
>>>
>
>>> [1]
>
>>> https://urldefense.proofpoint.com/v2/url?u=https-3A__jena.apache.org_documentation_javadoc_arq_org_apache_jena_query_Dataset.html-23containsNamedModel-2Djava.lang.String-2D&d=DwIGaQ&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=ld8gXdwUlVansMT0flGoGNN0AOkhQba_hAJM5PewJCA&m=_5kPj72-EHVEVxkEWZfp9umEDalFfeUoHIdfCCb9Plo&s=HB2xzUCShqe8JzEhH_9HaUktJ5rnUU2XOCqrcL6wOe8&e=
>
>>>
>
>>>
>
>>>
>
>>>
>
>>>
>
>>> Am 09.01.2020 06:59 schrieb Ashwani Rathi <as...@oracle.com>:
>
>>>
>
>>> Hi All,
>
>>>
>
>>> We are upgrading from jena 2 to jena 3.
>
>>>
>
>>> We have the following method in com.hp.hpl.jena.db.IDBConnection in
>
>>> jena 2:
>
>>>
>
>>>
>
>>>
>
>>>
>
>>> ------------------------------------------------------------------------------------------------------------
>
>>>
>
>>> containsModel
>
>>>
>
>>>
>
>>>
>
>>> boolean containsModel(String name) throws
>
>>> RDFRDBException
>
>>>
>
>>>
>
>>>
>
>>> Test if a given model is contained in the database.
>
>>>
>
>>>
>
>>>
>
>>> Parameters:
>
>>>
>
>>> name - the name of a model which may be in the database
>
>>>
>
>>> Returns:
>
>>>
>
>>> Boolean true if the model is contained in the database
>
>>>
>
>>> Throws:
>
>>>
>
>>> RDFDBException
>
>>>
>
>>> RDFRDBException
>
>>>
>
>>> Since:
>
>>>
>
>>> Jena 2.0
>
>>>
>
>>>
>
>>> ------------------------------------------------------------------------------------------------------------
>
>>>
>
>>> This method is used to check whether a given model exists in the
>
>>> underlying database.
>
>>>
>
>>>
>
>>>
>
>>> So is there a corresponding method to check for models in database in
>
>>> jena 3 in org.apache.jena.sdb.sql.SDBConnection.java class or in any other
>
>>> jena 3 jar?
>
>>>
>
>>>
>
>>>
>
>>> Regards,
>
>>>
>
>>> Ashwani
>
>>>
>
>>>
>
>>>
>
>>>
>
>>>
>
>>>
>
>>>
>
>>>
>
>>>
>
>>>
>
>>>
>
>>
>
>>
>
>
>
>
Re: Issues while upgrading to Jena-2.13.0 from version 2.8.8
Posted by Andy Seaborne <an...@apache.org>.
On 16/01/2020 03:14, Ashwani Rathi wrote:
> Hi,
> Thanks for pointing it out.
> Yes we are not upgrading to jena 3 now as the package structure in jena 3 is very different from jena 2.
"com.hp.hpl.jena" became "org.apache.jena". Structure under that was
largely unchanged.
But your code shows org.apache.jena.sdb which started 2012-10-10
<ver.jena>2.7.3</ver.jena>
<ver.arq>2.9.3</ver.arq>
> So we decided to first upgrade to jena version 2.13.0
> Current jena version in our project is 2.8.8
arq (not jena) was 2.8.8. That was 2011-04-21 and is not an Apache release.
If nothing else, it is before RDF 1.1 and SPARQL 1.1.
> Other details provided in the previous mail are same.
> We are getting the two issues mentioned in the mail below while trying to upgrade to jena version 2.13.0
> Can you please help in finding out what is the issue here?
It's not the code you are showing.
Look in the database logs and see what the SQL statement is.
There should be more information in the stacktrace such as the "caused by".
About (2)
Probably because there is no data in the model.
(The logic for getting the right model is strange - if there is no named
model it picks the default model but there are no details about how data
got into the database or how that code is called.)
Andy
FWIW The code history in the Apache repo does go back to when Jena was
in SVN at sourceforge.
>
> Regards,
> Ashwani
>
> On 15/01/20, 8:32 PM, "ajs6f" <aj...@apache.org> wrote:
>
> I'm a little confused. You say you are trying to use Jena 3, but that stacktrace features com.hp.hpl.jena.sdb package names, which are from Jena 2. Which one is executing this code? Are you bringing both on to the classpath together somehow?
>
> ajs6f
>
> > On Jan 15, 2020, at 7:09 AM, Ashwani Rathi <as...@oracle.com> wrote:
> >
> > Hi All,
> > As discussed, I am trying to make changes in our java cod to migrate from jena 2 to jena 3
> >
> > private Model getModelFromRDFStore(String modelName, java.sql.Connection conn)
> > {
> > org.apache.jena.sdb.StoreDesc storeDesc = new org.apache.jena.sdb.StoreDesc(org.apache.jena.sdb.store.LayoutType.LayoutTripleNodesIndex,
> > org.apache.jena.sdb.store.DatabaseType.Oracle) ;
> > org.apache.jena.sdb.Store store = null;
> > try {
> > store = org.apache.jena.sdb.SDBFactory.connectStore(conn, storeDesc);
> > if(!StoreUtils.isFormatted(store))
> > {
> > store.getTableFormatter().create();
> > }
> > } catch (java.sql.SQLException e) {
> > e.printStackTrace();
> > }
> > org.apache.jena.query.Dataset dataset = org.apache.jena.sdb.SDBFactory.connectDataset(store);
> > Model model = null;
> > if (!dataset.containsNamedModel(modelName)) {
> > model = dataset.getDefaultModel();
> > dataset.addNamedModel(modelName, model);
> > }
> > else {
> > model = dataset.getNamedModel(modelName);
> > }
> >
> > store.getConnection().close();
> > store.close();
> > System.out.println("############### RETURNING model ===== " + model);
> > return model;
> > }
> >
> > But I am getting the following issues
> >
> > 1) While printing the model (System.out.println("############### RETURNING model ===== " + model);), I am getting the following SQLException:
> >
> > <Jan 15, 2020 3:18:45,779 AM PST> <Error> <oracle.bpm.barch.reports.services.repository.rdfimpl> <BEA-000000> <<[Thread - [ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)' ]null.null> com.hp.hpl.jena.sdb.sql.SDBExceptionSQL: SQLException in executing SQL statement
> > at com.hp.hpl.jena.sdb.compiler.SDB_QC.exec(SDB_QC.java:84)
> > at com.hp.hpl.jena.sdb.compiler.OpSQL.exec(OpSQL.java:65)
> > at com.hp.hpl.jena.sdb.engine.QueryEngineSDB.eval(QueryEngineSDB.java:154)
> > at com.hp.hpl.jena.sparql.engine.QueryEngineBase.evaluate(QueryEngineBase.java:137)
> > at com.hp.hpl.jena.sparql.engine.QueryEngineBase.createPlan(QueryEngineBase.java:107)
> > at com.hp.hpl.jena.sparql.engine.QueryEngineBase.getPlan(QueryEngineBase.java:88)
> > at com.hp.hpl.jena.sdb.engine.QueryEngineSDB$QueryEngineFactorySDB.create(QueryEngineSDB.java:198)
> > at com.hp.hpl.jena.sdb.graph.GraphSDB.graphBaseFind(GraphSDB.java:169)
> > at com.hp.hpl.jena.graph.impl.GraphBase.find(GraphBase.java:277)
> > at com.hp.hpl.jena.graph.GraphUtil.findAll(GraphUtil.java:123)
> > at com.hp.hpl.jena.graph.impl.GraphBase.toString(GraphBase.java:436)
> > at com.hp.hpl.jena.graph.impl.GraphBase.toString(GraphBase.java:411)
> > at java.lang.String.valueOf(String.java:2981)
> > at java.lang.StringBuilder.append(StringBuilder.java:131)
> > at com.hp.hpl.jena.rdf.model.impl.ModelCom.toString(ModelCom.java:1506)
> > at java.lang.String.valueOf(String.java:2981)
> > at java.lang.StringBuilder.append(StringBuilder.java:131)
> >
> > 2) We are fetching model data from database, but I am not getting any details in the fetched model object. Is something missing in this logic?
> >
> > Regards,
> > Ashwani
> >
> > On 10/01/20, 4:14 PM, "Andy Seaborne" <an...@apache.org> wrote:
> >
> > Probably has not been formatted:
> >
> >
> >
> > https://urldefense.proofpoint.com/v2/url?u=http-3A__jena.apache.org_documentation_sdb_javaapi.html-23formatting-2Dor-2Demptying-2Dthe-2Dstore&d=DwIDaQ&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=ld8gXdwUlVansMT0flGoGNN0AOkhQba_hAJM5PewJCA&m=xMdWwv3NfQf8eKJO6IDGzidz0u7zt4EiZ0x6jeuB5WI&s=2bL8SFjE2-I7Ooz_b_k_V2x6t7R7hn50CNfPrVbF99A&e=
> >
> >
> >
> >
> >
> > On 10/01/2020 02:20, Ashwani Rathi wrote:
> >
> >> Hi All,
> >
> >> As discussed, I am trying to migrate from Jena 2 to Jena 3. As part of that we are trying to eliminate usage of com.hp.hpl.jena.db.IDBConnection and rather use org.apache.jena.sdb.sql.SDBConnection
> >
> >> Following is the method that we have written to get org.apache.jena.rdf.model.Model object from database
> >
> >>
> >
> >> private Model getModelFromRDFStore(String modelName, java.sql.Connection conn)
> >
> >> {
> >
> >> org.apache.jena.sdb.StoreDesc storeDesc = new org.apache.jena.sdb.StoreDesc(org.apache.jena.sdb.store.LayoutType.LayoutTripleNodesIndex,
> >
> >> org.apache.jena.sdb.store.DatabaseType.Oracle) ;
> >
> >> org.apache.jena.sdb.Store store = null;
> >
> >> try {
> >
> >> store = org.apache.jena.sdb.SDBFactory.connectStore(conn, storeDesc);
> >
> >> } catch (java.sql.SQLException e) {
> >
> >> e.printStackTrace();
> >
> >> }
> >
> >> org.apache.jena.query.Dataset dataset = org.apache.jena.sdb.SDBFactory.connectDataset(store);
> >
> >> Model model = null;
> >
> >> if (!dataset.containsNamedModel(modelName)) {
> >
> >> model = dataset.getDefaultModel();
> >
> >> dataset.addNamedModel(modelName, model);
> >
> >> }
> >
> >> else {
> >
> >> model = dataset.getNamedModel(modelName);
> >
> >> }
> >
> >> return model;
> >
> >> }
> >
> >>
> >
> >> But while checking for model in a dataset -> (!dataset.containsNamedModel(modelName)), we are getting the following error:
> >
> >> Caused by: java.sql.SQLSyntaxErrorException: ORA-00942: table or view does not exist
> >
> >>
> >
> >> Attached is the detailed exception. From the log it seems that some tables like Nodes N_1, Quads Q_1 , Nodes R_1, Nodes R_2 are missing.
> >
> >> So can anyone please tell what all tables (with columns) should we create to fix this issue?
> >
> >>
> >
> >> Regards,
> >
> >> Ashwani
> >
> >>
> >
> >>
> >
> >>
> >
> >> On 09/01/20, 8:07 PM, "Andy Seaborne" <an...@apache.org> wrote:
> >
> >>
> >
> >> Hi Ashwani,
> >
> >>
> >
> >> What are you trying to achieve overall?
> >
> >>
> >
> >> Is it to port an existing application/system from Jena 2.6 to Jena
> >
> >> 3.current?
> >
> >> Or is it create a general adaptor for Jena to Oracle Spatial RDF?
> >
> >>
> >
> >> The answers to your questions are different depending on use case.
> >
> >>
> >
> >> If it is the latter, then going down the SDB route may lead to a whole host
> >
> >> of problems because SDB is not deeply integrated into Jena anymore. For
> >
> >> example: transactions (and integration with Fuseki will be hard), newer
> >
> >> APIs like RDFConnection. You want to implement DatasetGraph and
> >
> >> Transactional. I doubt the database framework DBOE helps much but it is
> >
> >> worth checking that to see if it will save you work.
> >
> >>
> >
> >> If it is a one-off conversion for a specific application, things are
> >
> >> simpler because it's getting something to work for one, known case rather
> >
> >> arbitrary application use cases in the future and as Jena evolves.
> >
> >> ------------
> >
> >> Re: SDBConnection
> >
> >>
> >
> >> SDBConnection does not control the table naming. That's in the "FmtLayout"
> >
> >> classes.
> >
> >>
> >
> >> Re:LayoutType
> >
> >>
> >
> >> See the source code.
> >
> >> SDB uses one of three fixed table layouts. layout1 (really, *really* don't
> >
> >> use), layout2/index and layout2/hash.
> >
> >>
> >
> >> The SPARQL to SQL code generation is specific to the layout.
> >
> >>
> >
> >>
> >
> >> On Thu, 9 Jan 2020 at 12:24, Ashwani Rathi <as...@oracle.com> wrote:
> >
> >>
> >
> >>> Thanks for the reply.
> >
> >>>
> >
> >>> Also in jena 2, we can set TableNamePrefix on an IDBConnection with the
> >
> >>> following statements:
> >
> >>>
> >
> >>> IDBConnection conn = null;
> >
> >>> IRDBDriver driver = conn.getDriver();
> >
> >>> driver.setTableNamePrefix("prefix");
> >
> >>>
> >
> >>> So what actually does this achieve. And how can we achieve the same
> >
> >>> functionality in jena 3 with org.apache.jena.sdb.sql.SDBConnection class?
> >
> >>>
> >
> >>> Regards,
> >
> >>> Ashwani
> >
> >>>
> >
> >>> On 09/01/20, 2:15 PM, "Bögershausen, Merlin Michael" <
> >
> >>> merlin.boegershausen@rwth-aachen.de> wrote:
> >
> >>>
> >
> >>> Hi,
> >
> >>>
> >
> >>> You can check whether the dataset contains a specific named model with
> >
> >>> dataset.containesNamedModel() [1]
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>> Best Merlin
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>> [1]
> >
> >>> https://urldefense.proofpoint.com/v2/url?u=https-3A__jena.apache.org_documentation_javadoc_arq_org_apache_jena_query_Dataset.html-23containsNamedModel-2Djava.lang.String-2D&d=DwIGaQ&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=ld8gXdwUlVansMT0flGoGNN0AOkhQba_hAJM5PewJCA&m=_5kPj72-EHVEVxkEWZfp9umEDalFfeUoHIdfCCb9Plo&s=HB2xzUCShqe8JzEhH_9HaUktJ5rnUU2XOCqrcL6wOe8&e=
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>> Am 09.01.2020 06:59 schrieb Ashwani Rathi <as...@oracle.com>:
> >
> >>>
> >
> >>> Hi All,
> >
> >>>
> >
> >>> We are upgrading from jena 2 to jena 3.
> >
> >>>
> >
> >>> We have the following method in com.hp.hpl.jena.db.IDBConnection in
> >
> >>> jena 2:
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>> ------------------------------------------------------------------------------------------------------------
> >
> >>>
> >
> >>> containsModel
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>> boolean containsModel(String name) throws
> >
> >>> RDFRDBException
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>> Test if a given model is contained in the database.
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>> Parameters:
> >
> >>>
> >
> >>> name - the name of a model which may be in the database
> >
> >>>
> >
> >>> Returns:
> >
> >>>
> >
> >>> Boolean true if the model is contained in the database
> >
> >>>
> >
> >>> Throws:
> >
> >>>
> >
> >>> RDFDBException
> >
> >>>
> >
> >>> RDFRDBException
> >
> >>>
> >
> >>> Since:
> >
> >>>
> >
> >>> Jena 2.0
> >
> >>>
> >
> >>>
> >
> >>> ------------------------------------------------------------------------------------------------------------
> >
> >>>
> >
> >>> This method is used to check whether a given model exists in the
> >
> >>> underlying database.
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>> So is there a corresponding method to check for models in database in
> >
> >>> jena 3 in org.apache.jena.sdb.sql.SDBConnection.java class or in any other
> >
> >>> jena 3 jar?
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>> Regards,
> >
> >>>
> >
> >>> Ashwani
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>>
> >
> >>
> >
> >>
> >
> >
> >
> >
>
>
>
>