Package org.apache.metamodel.query

Examples of org.apache.metamodel.query.FilterItem

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                    }
                }

                // check for lookup query by primary key
                if (whereItems.size() == 1) {
                    final FilterItem whereItem = whereItems.get(0);
                    final SelectItem selectItem = whereItem.getSelectItem();
                    if (!whereItem.isCompoundFilter() && selectItem != null && selectItem.getColumn() != null) {
                        final Column column = selectItem.getColumn();
                        if (column.isPrimaryKey() && whereItem.getOperator() == OperatorType.EQUALS_TO) {
                            logger.debug("Query is a primary key lookup query. Trying executePrimaryKeyLookupQuery(...)");
                            if (table != null) {
                                if (isMainSchemaTable(table)) {
                                    final Object operand = whereItem.getOperand();
                                    final Row row = executePrimaryKeyLookupQuery(table, selectItems, column, operand);
                                    if (row == null) {
                                        logger.debug("DataContext did not return any GET query results. Proceeding with manual lookup.");
                                    } else {
                                        final DataSetHeader header = new SimpleDataSetHeader(selectItems);
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            fromItemDataSets[1] = materializeFromItem(fromItem.getRightSide(),
                    CollectionUtils.concat(true, selectItems, rightOn));

            FilterItem[] onConditions = new FilterItem[leftOn.size()];
            for (int i = 0; i < onConditions.length; i++) {
                FilterItem whereItem = new FilterItem(leftOn.get(i), OperatorType.EQUALS_TO, rightOn.get(i));
                onConditions[i] = whereItem;
            }
            if (joinType == JoinType.INNER) {
                dataSet = MetaModelHelper.getCarthesianProduct(fromItemDataSets, onConditions);
            } else if (joinType == JoinType.LEFT) {
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        QueryPostprocessDataContext dc = new CsvDataContext(file);
        Table table = dc.getDefaultSchema().getTableByName("csv_people.csv");

        Query q = new Query();
        q.from(table);
        q.where(new FilterItem(new SelectItem(table.getColumnByName("id")), OperatorType.EQUALS_TO, 1));
        q.select(table.getColumnByName("name"));
        DataSet data = dc.executeQuery(q);
        assertTrue(data.next());
        assertEquals("Row[values=[mike]]", data.getRow().toString());
        assertFalse(data.next());
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            for (int i = 0; i < numSplits; i++) {
                q = _query.clone();
                long lowLimit = min + (i * splitInterval);
                long highLimit = lowLimit + splitInterval;

                FilterItem lowerThanFilter = new FilterItem(new SelectItem(column), OperatorType.LESS_THAN, highLimit);
                FilterItem higherThanFilter = new FilterItem(new SelectItem(column), OperatorType.GREATER_THAN,
                        lowLimit);
                FilterItem equalsFilter = new FilterItem(new SelectItem(column), OperatorType.EQUALS_TO, lowLimit);

                if (i == 0) {
                    // This is the first split query: no higherThan filter and
                    // include
                    // IS NULL
                    FilterItem nullFilter = new FilterItem(new SelectItem(column), OperatorType.EQUALS_TO, null);
                    FilterItem orFilterItem = new FilterItem(lowerThanFilter, nullFilter);
                    q.where(orFilterItem);
                } else if (i + 1 == numSplits) {
                    // This is the lats split query: no lowerThan filter,
                    FilterItem orFilterItem = new FilterItem(higherThanFilter, equalsFilter);
                    q.where(orFilterItem);
                } else {
                    higherThanFilter = new FilterItem(higherThanFilter, equalsFilter);
                    lowerThanFilter = new FilterItem(lowerThanFilter, equalsFilter);
                    q.where(higherThanFilter);
                    q.where(lowerThanFilter);
                }
                result.add(q);
            }
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    protected Row executePrimaryKeyLookupQuery(Table table, List<SelectItem> selectItems, Column primaryKeyColumn, Object keyValue) {
        final DBCollection collection = _mongoDb.getCollection(table.getName());

        List<FilterItem> whereItems = new ArrayList<FilterItem>();
        SelectItem selectItem = new SelectItem(primaryKeyColumn);
        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);
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                        columns[i] = selectItems.get(i).getColumn();
                    }

                    // checking if the query is a primary key lookup query
                    if (whereItems.size() == 1) {
                        final FilterItem whereItem = whereItems.get(0);
                        final SelectItem selectItem = whereItem.getSelectItem();
                        if (!whereItem.isCompoundFilter() && selectItem != null && selectItem.getColumn() != null) {
                            final Column column = selectItem.getColumn();
                            if (column.isPrimaryKey() && whereItem.getOperator() == OperatorType.EQUALS_TO) {
                                logger.debug("Query is a primary key lookup query. Trying executePrimaryKeyLookupQuery(...)");
                                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);
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        assertEquals("r.name", data.getSelectItems()[0].toString());
        TableModel tableModel = new DataSetTableModel(data);
        assertEquals(3, tableModel.getRowCount());

        q.select(new SelectItem(FunctionType.COUNT, "*", "c"));
        q.where(new FilterItem(new SelectItem(roleColumn), OperatorType.EQUALS_TO, "founder"));
        data = dc.executeQuery(q);
        assertEquals(2, data.getSelectItems().length);
        assertEquals("r.name", data.getSelectItems()[0].toString());
        assertEquals("COUNT(*) AS c", data.getSelectItems()[1].toString());
        tableModel = new DataSetTableModel(data);
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        Column contributorIdColumn = table2.getColumnByName(COLUMN_ROLE_CONTRIBUTOR_ID);

        q.groupBy(roleColumn);
        SelectItem countSelectItem = new SelectItem(FunctionType.COUNT, contributorIdColumn).setAlias("my_count");
        q.select(new SelectItem(roleColumn), countSelectItem);
        q.having(new FilterItem(countSelectItem, OperatorType.GREATER_THAN, 1));
        q.orderBy(new OrderByItem(countSelectItem));
        assertEquals(
                "SELECT c.name, COUNT(c.contributor_id) AS my_count FROM MetaModelSchema.role c GROUP BY c.name HAVING COUNT(c.contributor_id) > 1 ORDER BY COUNT(c.contributor_id) ASC",
                q.toString());
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        Column contributorIdColumn = table2.getColumnByName(COLUMN_ROLE_CONTRIBUTOR_ID);

        q.groupBy(roleColumn);
        SelectItem countSelectItem = new SelectItem(FunctionType.COUNT, contributorIdColumn).setAlias("my_count");
        q.select(new SelectItem(roleColumn));
        q.having(new FilterItem(countSelectItem, OperatorType.GREATER_THAN, 3));
        assertEquals("SELECT c.name FROM MetaModelSchema.role c GROUP BY c.name HAVING COUNT(c.contributor_id) > 3",
                q.toString());

        DataSet data = getDataContext().executeQuery(q);
        assertTrue(data.next());
        assertEquals("Row[values=[developer]]", data.getRow().toString());
        assertFalse(data.next());
        data.close();

        q.getHavingClause().removeItems();
        q.having(new FilterItem(SelectItem.getCountAllItem(), OperatorType.GREATER_THAN, 3));
        assertEquals("SELECT c.name FROM MetaModelSchema.role c GROUP BY c.name HAVING COUNT(*) > 3", q.toString());
        data = getDataContext().executeQuery(q);
        assertTrue(data.next());
        assertEquals("Row[values=[developer]]", data.getRow().toString());
        assertFalse(data.next());
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        Query q = new Query();
        q.from(table1);
        q.select(table1.getColumns());
        SelectItem countrySelectItem = q.getSelectClause().getSelectItem(
                table1.getColumnByName(COLUMN_CONTRIBUTOR_COUNTRY));
        q.where(new FilterItem(countrySelectItem, OperatorType.EQUALS_TO, "denmark"));

        DataSet data = dc.executeQuery(q);
        for (int i = 0; i < 3; i++) {
            assertTrue("Assertion failed at i=" + i, data.next());
        }
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Related Classes of org.apache.metamodel.query.FilterItem

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