Examples of org.openrdf.query.TupleQueryResultHandlerException

org.openrdf.query.TupleQueryResultHandlerException
An exception that can be thrown by an TupleQueryResultHandler when it encounters an unrecoverable error. If an exception is associated with the error then this exception can be wrapped in a TupleHandlerException and can later be retrieved from it when the TupleHandlerException is caught using the getCause().


  public void handleSolution(BindingSet bindingSet)
    throws TupleQueryResultHandlerException
  {
    if (closed) {
      throw new TupleQueryResultHandlerException("Result closed");
    }
    try {
      queue.put(bindingSet);
    }
    catch (InterruptedException e) {
      throw new TupleQueryResultHandlerException(e);
    }
  }

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      // Write start of results
      xmlWriter.startTag(RESULT_SET_TAG);
    }
    catch (IOException e) {
      throw new TupleQueryResultHandlerException(e);
    }
  }

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      xmlWriter.endTag(ROOT_TAG);


      xmlWriter.endDocument();
    }
    catch (IOException e) {
      throw new TupleQueryResultHandlerException(e);
    }
  }

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      }


      xmlWriter.endTag(RESULT_TAG);
    }
    catch (IOException e) {
      throw new TupleQueryResultHandlerException(e);
    }
  }

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      List<Value> nullTuple = Collections.nCopies(this.bindingNames.size(), (Value)null);
      previousBindings = new ListBindingSet(this.bindingNames, nullTuple);
      nextNamespaceID = 0;
    }
    catch (IOException e) {
      throw new TupleQueryResultHandlerException(e);
    }
  }

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    try {
      out.writeByte(TABLE_END_RECORD_MARKER);
      out.flush();
    }
    catch (IOException e) {
      throw new TupleQueryResultHandlerException(e);
    }
  }

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          }
          else if (value instanceof Literal) {
            writeLiteral((Literal)value);
          }
          else {
            throw new TupleQueryResultHandlerException("Unknown Value object type: " + value.getClass());
          }
        }


        previousBindings = bindingSet;
      }
    }
    catch (IOException e) {
      throw new TupleQueryResultHandlerException(e);
    }
  }

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                    public void startQueryResult(List<String> bindingNames) throws TupleQueryResultHandlerException {
                        subject = triples.getValueFactory().createURI(resource.stringValue());
                        try {
                            con = triples.getConnection();
                        } catch (RepositoryException e) {
                            throw new TupleQueryResultHandlerException("error while creating repository connection",e);
                        }
                    }


                    @Override
                    public void endQueryResult() throws TupleQueryResultHandlerException   {
                        try {
                            con.commit();
                            con.close();
                        } catch (RepositoryException e) {
                            throw new TupleQueryResultHandlerException("error while closing repository connection",e);
                        }
                    }


                    @Override
                    public void handleSolution(BindingSet bindingSet) throws TupleQueryResultHandlerException {


                        try {
                            Value predicate = bindingSet.getValue("p");
                            Value object    = bindingSet.getValue("o");


                            if(predicate instanceof URI) {
                                con.add(triples.getValueFactory().createStatement(subject,(URI)predicate,object));
                            } else {
                                log.error("ignoring binding as predicate {} is not a URI",predicate);
                            }
                        } catch (RepositoryException e) {
                            throw new TupleQueryResultHandlerException("error while adding triple to repository connection",e);
                        }
                    }
                },
                triples.getValueFactory());

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      openArray();


      firstTupleWritten = false;
    }
    catch (IOException e) {
      throw new TupleQueryResultHandlerException(e);
    }
  }

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      closeBraces(); // results braces
      closeBraces(); // root braces
      writer.flush();
    }
    catch (IOException e) {
      throw new TupleQueryResultHandlerException(e);
    }
  }

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