Examples of org.drools.QueryResults$QueryResultsIterator

org.drools.QueryResults
Returned QueryResults instance for a requested named query. from here you can iterate the returned data, or get a specific row. All the available Declarations used in the query can also be accessed.

            queryObj = (Query) node.getRule();


            this.handleFactory.destroyFactHandle( handle );
        }


        return new QueryResults( list,
                                 queryObj,
                                 this );
    }

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            }


            executeQueuedActions();
            


            return new QueryResults( (List<QueryRowWithSubruleIndex>) queryObject.getQueryResultCollector().getResults(),
                                     decls.toArray( new Map[decls.size()] ),
                                     this,
                                     ( queryObject.getQuery() != null ) ? queryObject.getQuery().getParameters()  : new Declaration[0] );
        } finally {
            this.lock.unlock();

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        } catch ( final Exception e ) {
            Assert.fail( "Should not throw any exception: " + e.getMessage() );
        }


        final WorkingMemory workingMemory = ruleBase.newStatefulSession();
        QueryResults results = workingMemory.getQueryResults( "query-1" );


        assertEquals( 0,
                      results.size() );


        final Cheese stilton1 = new Cheese( "stilton",
                                            100 );
        final FactHandle handle1 = workingMemory.insert( stilton1 );


        results = workingMemory.getQueryResults( "query-1" );


        assertEquals( 1,
                      results.size() );


        final Cheese cheddar = new Cheese( "cheddar",
                                           55 );
        workingMemory.insert( cheddar );


        results = workingMemory.getQueryResults( "query-1" );


        assertEquals( 1,
                      results.size() );


        final Cheese stilton2 = new Cheese( "stilton",
                                            5 );


        final FactHandle handle2 = workingMemory.insert( stilton2 );


        results = workingMemory.getQueryResults( "query-1" );


        assertEquals( 2,
                      results.size() );


        QueryResult result = results.get( 0 );
        assertEquals( 1,
                      result.size() );
        assertEquals( stilton1,
                      result.get( 0 ) );


        result = results.get( 1 );
        assertEquals( 1,
                      result.size() );
        assertEquals( stilton2,
                      result.get( 0 ) );


        int i = 0;
        for ( final Iterator it = results.iterator(); it.hasNext(); ) {
            result = (QueryResult) it.next();
            assertEquals( 1,
                          result.size() );
            if ( i == 1 ) {
                assertSame( stilton2,
                            result.get( 0 ) );
            } else {
                assertSame( stilton1,
                            result.get( 0 ) );
            }
            i++;
        }


        workingMemory.retract( handle1 );
        results = workingMemory.getQueryResults( "query-1" );


        assertEquals( 1,
                      results.size() );


        workingMemory.retract( handle2 );
        results = workingMemory.getQueryResults( "query-1" );


        assertEquals( 0,
                      results.size() );


    }

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        final WorkingMemory workingMemory = ruleBase.newStatefulSession();


        final Cheese stilton = new Cheese( "stinky",
                                           5 );
        workingMemory.insert( stilton );
        final QueryResults results = workingMemory.getQueryResults( "simple query" );
        assertEquals( 1,
                      results.size() );
    }

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        ruleBase.addPackage( builder.getPackage() );


        final WorkingMemory workingMemory = ruleBase.newStatefulSession();
        workingMemory.fireAllRules();


        final QueryResults results = workingMemory.getQueryResults( "assertedobjquery" );
        assertEquals( 1,
                      results.size() );
        assertEquals( new InsertedObject( "value1" ),
                      results.get( 0 ).get( 0 ) );
    }

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        ruleBase.addPackage( builder.getPackage() );


        final WorkingMemory workingMemory = ruleBase.newStatefulSession();
        workingMemory.fireAllRules();


        QueryResults results = workingMemory.getQueryResults( "assertedobjquery",
                                                              new String[]{"value1"} );
        assertEquals( 1,
                      results.size() );
        assertEquals( new InsertedObject( "value1" ),
                      results.get( 0 ).get( 0 ) );


        results = workingMemory.getQueryResults( "assertedobjquery",
                                                 new String[]{"value3"} );
        assertEquals( 0,
                      results.size() );


        results = workingMemory.getQueryResults( "assertedobjquery2",
                                                 new String[]{null, "value2"} );
        assertEquals( 1,
                      results.size() );
        assertEquals( new InsertedObject( "value2" ),
                      results.get( 0 ).get( 0 ) );


        results = workingMemory.getQueryResults( "assertedobjquery2",
                                                 new String[]{"value3", "value2"} );
        assertEquals( 1,
                      results.size() );
        assertEquals( new InsertedObject( "value2" ),
                      results.get( 0 ).get( 0 ) );
    }

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                                        40 );


        workingMemory.insert( per1 );
        workingMemory.insert( per2 );


        QueryResults results = workingMemory.getQueryResults( "find stinky cheeses" );
        assertEquals( 1,
                      results.size() );


        results = workingMemory.getQueryResults( "find pensioners" );
        assertEquals( 1,
                      results.size() );
    }

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                                      40 );
        p3.setStatus( "europe" );
        final FactHandle c3FactHandle = workingMemory.insert( p3 );
        workingMemory.fireAllRules();


        QueryResults queryResults = workingMemory.getQueryResults( "2 persons with the same status" );
        assertEquals( 2,
                      queryResults.size() );


        // europe=[ 1, 2 ], america=[ 3 ]
        p3.setStatus( "america" );
        workingMemory.update( c3FactHandle,
                              p3 );
        workingMemory.fireAllRules();
        queryResults = workingMemory.getQueryResults( "2 persons with the same status" );
        assertEquals( 1,
                      queryResults.size() );


        // europe=[ 1 ], america=[ 2, 3 ]
        p2.setStatus( "america" );
        workingMemory.update( c2FactHandle,
                              p2 );
        workingMemory.fireAllRules();
        queryResults = workingMemory.getQueryResults( "2 persons with the same status" );
        assertEquals( 1,
                      queryResults.size() );


        // europe=[ ], america=[ 1, 2, 3 ]
        p1.setStatus( "america" );
        workingMemory.update( c1FactHandle,
                              p1 );
        workingMemory.fireAllRules();
        queryResults = workingMemory.getQueryResults( "2 persons with the same status" );
        assertEquals( 2,
                      queryResults.size() );


        // europe=[ 2 ], america=[ 1, 3 ]
        p2.setStatus( "europe" );
        workingMemory.update( c2FactHandle,
                              p2 );
        workingMemory.fireAllRules();
        queryResults = workingMemory.getQueryResults( "2 persons with the same status" );
        assertEquals( 1,
                      queryResults.size() );


        // europe=[ 1, 2 ], america=[ 3 ]
        p1.setStatus( "europe" );
        workingMemory.update( c1FactHandle,
                              p1 );
        workingMemory.fireAllRules();
        queryResults = workingMemory.getQueryResults( "2 persons with the same status" );
        assertEquals( 1,
                      queryResults.size() );


        // europe=[ 1, 2, 3 ], america=[ ]
        p3.setStatus( "europe" );
        workingMemory.update( c3FactHandle,
                              p3 );
        workingMemory.fireAllRules();
        queryResults = workingMemory.getQueryResults( "2 persons with the same status" );
        assertEquals( 2,
                      queryResults.size() );
    }

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        ruleBase.addPackage( builder.getPackage() );


        final WorkingMemory workingMemory = ruleBase.newStatefulSession();
        workingMemory.fireAllRules();


        final QueryResults results = workingMemory.getQueryResults( "collect objects" );
        assertEquals( 1,
                      results.size() );


        final QueryResult result = results.get( 0 );
        final List list = (List) result.get( "$list" );


        assertEquals( 2,
                      list.size() );
    }

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        final WorkingMemory workingMemory = ruleBase.newStatefulSession();


        final Cheese stilton = new Cheese( "stinky",
                                           5 );
        workingMemory.insert( stilton );
        final QueryResults results = workingMemory.getQueryResults( "simple query" );
        assertEquals( 1,
                      results.size() );
    }

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