java java.util.ConcurrentModificationException while adding property to apache jena
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Hi I have this piece of code which is giving me trouble:
StmtIterator iter2 = model.listStatements(new SimpleSelector(null, FOAF.family_name, (RDFNode) null) {
public boolean selects(Statement s) {
// return the statements whose object equal to the required place
return s.getString().toLowerCase().equals(latin.toLowerCase());
}
});
if (iter2.hasNext()) {
while (iter2.hasNext()) {
Statement s = iter2.nextStatement();
// s.getSubject().addProperty(FOAF.family_name, maltese, "mt");
}
}
The commented line is the line throwing the exception. Any idea why this is happening?
This is the whole error output:
Exception in thread "main" java.util.ConcurrentModificationException
at com.hp.hpl.jena.mem.HashCommon$BasicKeyIterator.hasNext(HashCommon.java:354)
at com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:103)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at com.hp.hpl.jena.util.iterator.Map1Iterator.hasNext(Map1Iterator.java:48)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at com.hp.hpl.jena.util.iterator.FilterIterator.hasNext(FilterIterator.java:54)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at NotarialArchivesTurtle.main(NotarialArchivesTurtle.java:643)
The problem seems to be caused because I am adding a property the same as the one I was searching for ie: family_name
java apache error-handling
asked Nov 23 '18 at 14:27
Joe124Joe124
315
add a comment |
0
Hi I have this piece of code which is giving me trouble:
StmtIterator iter2 = model.listStatements(new SimpleSelector(null, FOAF.family_name, (RDFNode) null) {
public boolean selects(Statement s) {
// return the statements whose object equal to the required place
return s.getString().toLowerCase().equals(latin.toLowerCase());
}
});
if (iter2.hasNext()) {
while (iter2.hasNext()) {
Statement s = iter2.nextStatement();
// s.getSubject().addProperty(FOAF.family_name, maltese, "mt");
}
}
The commented line is the line throwing the exception. Any idea why this is happening?
This is the whole error output:
Exception in thread "main" java.util.ConcurrentModificationException
at com.hp.hpl.jena.mem.HashCommon$BasicKeyIterator.hasNext(HashCommon.java:354)
at com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:103)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at com.hp.hpl.jena.util.iterator.Map1Iterator.hasNext(Map1Iterator.java:48)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at com.hp.hpl.jena.util.iterator.FilterIterator.hasNext(FilterIterator.java:54)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at NotarialArchivesTurtle.main(NotarialArchivesTurtle.java:643)
The problem seems to be caused because I am adding a property the same as the one I was searching for ie: family_name
java apache error-handling
asked Nov 23 '18 at 14:27
Joe124Joe124
315
1
Can you post a full running code sample?
– user10639668
Nov 23 '18 at 14:30
skeeps a reference to the Iterator you are iterating on. When you try to add a property on it, you are actually trying to modify the iterator that you are using. Try deep-cloningswith.clone()and add the property there.
– Sofo Gial
Nov 23 '18 at 14:39
I don't think that s.clone() is possible...I thought that something like that is happening but didn't find a way around it
– Joe124
Nov 23 '18 at 14:45
@Joe124 You can try and take a look here on how to get a deep-copy: baeldung.com/java-deep-copy
– Sofo Gial
Nov 23 '18 at 15:18
add a comment |
0
0
0
Hi I have this piece of code which is giving me trouble:
StmtIterator iter2 = model.listStatements(new SimpleSelector(null, FOAF.family_name, (RDFNode) null) {
public boolean selects(Statement s) {
// return the statements whose object equal to the required place
return s.getString().toLowerCase().equals(latin.toLowerCase());
}
});
if (iter2.hasNext()) {
while (iter2.hasNext()) {
Statement s = iter2.nextStatement();
// s.getSubject().addProperty(FOAF.family_name, maltese, "mt");
}
}
The commented line is the line throwing the exception. Any idea why this is happening?
This is the whole error output:
Exception in thread "main" java.util.ConcurrentModificationException
at com.hp.hpl.jena.mem.HashCommon$BasicKeyIterator.hasNext(HashCommon.java:354)
at com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:103)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at com.hp.hpl.jena.util.iterator.Map1Iterator.hasNext(Map1Iterator.java:48)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at com.hp.hpl.jena.util.iterator.FilterIterator.hasNext(FilterIterator.java:54)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at NotarialArchivesTurtle.main(NotarialArchivesTurtle.java:643)
The problem seems to be caused because I am adding a property the same as the one I was searching for ie: family_name
java apache error-handling
asked Nov 23 '18 at 14:27
Joe124Joe124
315
Hi I have this piece of code which is giving me trouble:
StmtIterator iter2 = model.listStatements(new SimpleSelector(null, FOAF.family_name, (RDFNode) null) {
public boolean selects(Statement s) {
// return the statements whose object equal to the required place
return s.getString().toLowerCase().equals(latin.toLowerCase());
}
});
if (iter2.hasNext()) {
while (iter2.hasNext()) {
Statement s = iter2.nextStatement();
// s.getSubject().addProperty(FOAF.family_name, maltese, "mt");
}
}
The commented line is the line throwing the exception. Any idea why this is happening?
This is the whole error output:
Exception in thread "main" java.util.ConcurrentModificationException
at com.hp.hpl.jena.mem.HashCommon$BasicKeyIterator.hasNext(HashCommon.java:354)
at com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:103)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at com.hp.hpl.jena.util.iterator.Map1Iterator.hasNext(Map1Iterator.java:48)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at com.hp.hpl.jena.util.iterator.FilterIterator.hasNext(FilterIterator.java:54)
at com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
at NotarialArchivesTurtle.main(NotarialArchivesTurtle.java:643)
The problem seems to be caused because I am adding a property the same as the one I was searching for ie: family_name
java apache error-handling
java apache error-handling
asked Nov 23 '18 at 14:27
Joe124Joe124
315
asked Nov 23 '18 at 14:27
Joe124Joe124
315
edited Nov 23 '18 at 14:34
Joe124
asked Nov 23 '18 at 14:27
Joe124Joe124
315
asked Nov 23 '18 at 14:27
Joe124Joe124
315
asked Nov 23 '18 at 14:27
Joe124Joe124
315
315
1
Can you post a full running code sample?
– user10639668
Nov 23 '18 at 14:30
skeeps a reference to the Iterator you are iterating on. When you try to add a property on it, you are actually trying to modify the iterator that you are using. Try deep-cloningswith.clone()and add the property there.
– Sofo Gial
Nov 23 '18 at 14:39
I don't think that s.clone() is possible...I thought that something like that is happening but didn't find a way around it
– Joe124
Nov 23 '18 at 14:45
@Joe124 You can try and take a look here on how to get a deep-copy: baeldung.com/java-deep-copy
– Sofo Gial
Nov 23 '18 at 15:18
add a comment |
1
Can you post a full running code sample?
– user10639668
Nov 23 '18 at 14:30
skeeps a reference to the Iterator you are iterating on. When you try to add a property on it, you are actually trying to modify the iterator that you are using. Try deep-cloningswith.clone()and add the property there.
– Sofo Gial
Nov 23 '18 at 14:39
I don't think that s.clone() is possible...I thought that something like that is happening but didn't find a way around it
– Joe124
Nov 23 '18 at 14:45
@Joe124 You can try and take a look here on how to get a deep-copy: baeldung.com/java-deep-copy
– Sofo Gial
Nov 23 '18 at 15:18
1
1
Can you post a full running code sample?
– user10639668
Nov 23 '18 at 14:30
Can you post a full running code sample?
– user10639668
Nov 23 '18 at 14:30
s keeps a reference to the Iterator you are iterating on. When you try to add a property on it, you are actually trying to modify the iterator that you are using. Try deep-cloning s with .clone() and add the property there.– Sofo Gial
Nov 23 '18 at 14:39
s keeps a reference to the Iterator you are iterating on. When you try to add a property on it, you are actually trying to modify the iterator that you are using. Try deep-cloning s with .clone() and add the property there.– Sofo Gial
Nov 23 '18 at 14:39
I don't think that s.clone() is possible...I thought that something like that is happening but didn't find a way around it
– Joe124
Nov 23 '18 at 14:45
I don't think that s.clone() is possible...I thought that something like that is happening but didn't find a way around it
– Joe124
Nov 23 '18 at 14:45
@Joe124 You can try and take a look here on how to get a deep-copy: baeldung.com/java-deep-copy
– Sofo Gial
Nov 23 '18 at 15:18
@Joe124 You can try and take a look here on how to get a deep-copy: baeldung.com/java-deep-copy
– Sofo Gial
Nov 23 '18 at 15:18
add a comment |
0
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1
Can you post a full running code sample?
– user10639668
Nov 23 '18 at 14:30
skeeps a reference to the Iterator you are iterating on. When you try to add a property on it, you are actually trying to modify the iterator that you are using. Try deep-cloningswith.clone()and add the property there.– Sofo Gial
Nov 23 '18 at 14:39
I don't think that s.clone() is possible...I thought that something like that is happening but didn't find a way around it
– Joe124
Nov 23 '18 at 14:45
@Joe124 You can try and take a look here on how to get a deep-copy: baeldung.com/java-deep-copy
– Sofo Gial
Nov 23 '18 at 15:18