Jan Martin Keil created JENA-1841:
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Summary: Side Effect of Datatype <java:java.util.UUID> Use in Query
Key: JENA-1841
URL: https://issues.apache.org/jira/browse/JENA-1841
Project: Apache Jena
Issue Type: Improvement
Affects Versions: Jena 3.14.0
Reporter: Jan Martin Keil
I faced a bug caused by a side effect of using the datatype
<java:java.util.UUID> in a query.
Short story is that you can not use this datatype in model parsing or queries
after you once used it in a query.
I did not completely break it down to a specific peace of code, but I wrote
some testcases that narrow down the issue. Please note that the order of
execution of the test methods effect the result. So please first try to execute
single test methods before executing the whole test class.
{code:java}
import java.io.ByteArrayInputStream;
import java.util.UUID;import org.apache.jena.arq.querybuilder.SelectBuilder;
import org.apache.jena.query.QueryExecution;
import org.apache.jena.query.QueryExecutionFactory;
import org.apache.jena.rdf.model.Model;
import org.apache.jena.rdf.model.ModelFactory;
import org.junit.jupiter.api.Test;public class UuidParsingintoModelOrQuery {
@Test
public void uuidParsingIntoSingleModel() throws Exception {
UUID uuid1 =
UUID.fromString("00000000-0000-0000-0000-000000000000");
UUID uuid2 =
UUID.fromString("00000000-0000-0000-0000-000000000001"); String
modelStr = "_:a <http://example.org/p1> \"" + uuid1 +
"\"^^<java:java.util.UUID> .\n"
+ "_:a <http://example.org/p2> \"" + uuid1 +
"\"^^<java:java.util.UUID> .";
ModelFactory.createDefaultModel().read(new
ByteArrayInputStream(modelStr.getBytes()), "", "N-TRIPLE");
// repeat
modelStr = "_:a <http://example.org/p1> \"" + uuid2 +
"\"^^<java:java.util.UUID> .\n"
+ "_:a <http://example.org/p2> \"" + uuid2 +
"\"^^<java:java.util.UUID> .";
ModelFactory.createDefaultModel().read(new
ByteArrayInputStream(modelStr.getBytes()), "", "N-TRIPLE");
} @Test
public void sameUuidParsingIntoSingleModel() throws Exception {
UUID uuid1 =
UUID.fromString("00000000-0000-0000-0000-000000000002");
UUID uuid2 =
UUID.fromString("00000000-0000-0000-0000-000000000003");
String modelStr = "_:a <http://example.org/p1> \"" + uuid1 +
"\"^^<java:java.util.UUID> .\n"
+ "_:a <http://example.org/p2> \"" + uuid2 +
"\"^^<java:java.util.UUID> .";
ModelFactory.createDefaultModel().read(new
ByteArrayInputStream(modelStr.getBytes()), "", "N-TRIPLE");
// repeat
ModelFactory.createDefaultModel().read(new
ByteArrayInputStream(modelStr.getBytes()), "", "N-TRIPLE");
} @Test
public void sameUuidParsingIntoMultipleModel() throws Exception {
UUID uuid =
UUID.fromString("00000000-0000-0000-0000-000000000004");
String modelStr = "_:a <http://example.org/p1> \"" + uuid +
"\"^^<java:java.util.UUID> .";
ModelFactory.createDefaultModel().read(new
ByteArrayInputStream(modelStr.getBytes()), "", "N-TRIPLE");
ModelFactory.createDefaultModel().read(new
ByteArrayInputStream(modelStr.getBytes()), "", "N-TRIPLE");
} @Test
public void uuidUseInQuery() throws Exception {
UUID uuid =
UUID.fromString("00000000-0000-0000-0000-000000000005");
SelectBuilder select = new SelectBuilder();
select.addWhere("?a", "<http://example.org/p>", "?uuid");
select.addFilter(select.getExprFactory().eq("?uuid", uuid));
QueryExecution q = QueryExecutionFactory.create(select.build());
} @Test
public void uuidParsingIntoQuery() throws Exception {
UUID uuid =
UUID.fromString("00000000-0000-0000-0000-000000000006");
SelectBuilder select = new SelectBuilder();
select.addWhere("?a", "<http://example.org/p>", "?uuid");
select.addFilter(select.getExprFactory().eq("?uuid", uuid));
QueryExecution q =
QueryExecutionFactory.create(select.toString());
} @Test
public void uuidUseInQueryAndParsingIntoModel() throws Exception {
UUID uuid =
UUID.fromString("00000000-0000-0000-0000-000000000007");
SelectBuilder select = new SelectBuilder();
select.addWhere("?a", "<http://example.org/p>", "?uuid");
select.addFilter(select.getExprFactory().eq("?uuid", uuid));
QueryExecution q = QueryExecutionFactory.create(select.build());
String modelStr = "_:a <http://example.org/p1> \"" + uuid +
"\"^^<java:java.util.UUID> .\n"
+ "_:a <http://example.org/p2> \"" + uuid +
"\"^^<java:java.util.UUID> .";
Model model = ModelFactory.createDefaultModel().read(new
ByteArrayInputStream(modelStr.getBytes()), "",
"N-TRIPLE");
}
}{code}
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