Examples of org.apache.metamodel.data.SimpleDataSetHeader

org.apache.metamodel.data.SimpleDataSetHeader
Simple implementation of {@link DataSetHeader} which does no magic to improveperformance. Note that except for datasets with very few records, the {@link CachingDataSetHeader} is preferred.


    public void testEvaluateBooleans() throws Exception {
        Column col1 = new MutableColumn("Col1", ColumnType.BIT);
        SelectItem s1 = new SelectItem(col1);
        SelectItem[] selectItems = new SelectItem[] { s1 };
        DataSetHeader header = new SimpleDataSetHeader(selectItems);


        FilterItem c = new FilterItem(s1, OperatorType.EQUALS_TO, true);


        Row row = new DefaultRow(header, new Object[] { true });
        assertTrue(c.evaluate(row));

View Full Code Here

        FilterItem c3 = new FilterItem(s1, OperatorType.EQUALS_TO, "foobar");


        FilterItem filter = new FilterItem(c1, c2, c3);
        assertEquals("(Col1 = 'foo' OR Col1 = 'bar' OR Col1 = 'foobar')", filter.toString());


        DataSetHeader header = new SimpleDataSetHeader(new SelectItem[] { s1 });


        assertTrue(filter.evaluate(new DefaultRow(header, new Object[] { "foo" })));
        assertTrue(filter.evaluate(new DefaultRow(header, new Object[] { "bar" })));
        assertTrue(filter.evaluate(new DefaultRow(header, new Object[] { "foobar" })));

View Full Code Here

    protected static DataSet createDataSet(SelectItem[] selectItems, List<Object[]> data) {
        if (data.isEmpty()) {
            return new EmptyDataSet(selectItems);
        }


        SimpleDataSetHeader header = new SimpleDataSetHeader(selectItems);


        List<Row> rows = new ArrayList<Row>();
        for (Object[] objects : data) {
            rows.add(new DefaultRow(header, objects));
        }

View Full Code Here

                OperatorType.EQUALS_TO, item3) });


        assertEquals(SubSelectionDataSet.class, joinedDs.getClass());
        assertEquals("[foo AS f, bar AS b, baz AS z]", Arrays.toString(joinedDs.getSelectItems()));


        DataSetHeader header1 = new SimpleDataSetHeader(selectItems1);
        Row row = new DefaultRow(header1, new Object[] { 1, 2 }, null);
        ds1 = new InMemoryDataSet(header1, row);


        joinedDs = MetaModelHelper.getLeftJoin(ds1, ds2, new FilterItem[] { new FilterItem(item2,
                OperatorType.EQUALS_TO, item3) });

View Full Code Here

        final JsonNode node = connector.find(JsonNode.class, keyString);
        if (node == null) {
            return null;
        }


        return CouchDbUtils.jsonNodeToMetaModelRow(node, new SimpleDataSetHeader(selectItems));
    }

View Full Code Here

        FilterItem primaryKeyWhereItem = new FilterItem(selectItem, OperatorType.EQUALS_TO, keyValue);
        whereItems.add(primaryKeyWhereItem);
        final DBObject query = createMongoDbQuery(table, whereItems);
        final DBObject resultDBObject = collection.findOne(query);


        DataSetHeader header = new SimpleDataSetHeader(selectItems);


        Row row = MongoDBUtils.toRow(resultDBObject, header);


        return row;
    }

View Full Code Here

                                final Object operand = whereItem.getOperand();
                                final Row row = executePrimaryKeyLookupQuery(table, selectItems, column, operand);
                                if (row == null) {
                                    logger.debug("DataContext did not return any primary key lookup query results. Proceeding with manual lookup.");
                                } else {
                                    final DataSetHeader header = new SimpleDataSetHeader(selectItems);
                                    return new InMemoryDataSet(header, row);
                                }
                            }
                        }
                    }

View Full Code Here

        if (functionItems.size() != workSelectItems.size()) {
            onlyAggregates = false;
            header = new CachingDataSetHeader(workSelectItems);
        } else {
            onlyAggregates = true;
            header = new SimpleDataSetHeader(workSelectItems);
        }


        final List<Row> resultRows = new ArrayList<Row>();
        while (dataSet.next()) {
            final Row inputRow = dataSet.getRow();

View Full Code Here

                        final Number count = executeCountQuery(table, whereItems, functionApproximationAllowed);
                        if (count == null) {
                            logger.debug("DataContext did not return any count query results. Proceeding with manual counting.");
                        } else {
                            List<Row> data = new ArrayList<Row>(1);
                            final DataSetHeader header = new SimpleDataSetHeader(new SelectItem[] { selectItem });
                            data.add(new DefaultRow(header, new Object[] { count }));
                            return new InMemoryDataSet(header, data);
                        }
                    }
                }

View Full Code Here


    private DataSet materializeInformationSchemaTable(final Table table, final List<SelectItem> selectItems,
            final int maxRows) {
        final String tableName = table.getName();
        final SelectItem[] columnSelectItems = MetaModelHelper.createSelectItems(table.getColumns());
        final SimpleDataSetHeader header = new SimpleDataSetHeader(columnSelectItems);
        final Table[] tables = getMainSchemaInternal().getTables();
        final List<Row> data = new ArrayList<Row>();
        if ("tables".equals(tableName)) {
            // "tables" columns: name, type, num_columns, remarks
            for (Table t : tables) {

View Full Code Here

0 1

TOP

Related Classes of org.apache.metamodel.data.SimpleDataSetHeader

org.apache.metamodel.couchdb.CouchDbDataContext

org.apache.metamodel.DeleteAndInsertBuilder

org.apache.metamodel.excel.ExcelDeleteBuilder

org.apache.metamodel.hbase.HBaseDataContext

org.apache.metamodel.MetaModelHelper

org.apache.metamodel.MetaModelHelperTest

org.apache.metamodel.MetaModelTestCase

org.apache.metamodel.mongodb.MongoDbDataContext

org.apache.metamodel.query.FilterItemTest

org.apache.metamodel.query.SelectItem

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.