Package org.apache.metamodel.data

Examples of org.apache.metamodel.data.SimpleDataSetHeader

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                // use original value
                value = original.getValue(i);
            }
            values[i] = value;
        }
        return new DefaultRow(new SimpleDataSetHeader(items), values);
    }
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                            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);
                            }
                        }
                    }
                }

                // 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);
                                        return new InMemoryDataSet(header, row);
                                    }
                                }
                            }
                        }
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    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) {
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        // accessing rows).
        final Workbook workbook = _updateCallback.getWorkbook(false);

        final String tableName = getTable().getName();
        final SelectItem[] selectItems = MetaModelHelper.createSelectItems(getTable().getColumns());
        final DataSetHeader header = new SimpleDataSetHeader(selectItems);
        final Sheet sheet = workbook.getSheet(tableName);

        final Iterator<Row> rowIterator = ExcelUtils.getRowIterator(sheet, _updateCallback.getConfiguration(), true);
        final List<Row> rowsToDelete = new ArrayList<Row>();
        while (rowIterator.hasNext()) {
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    protected Row executePrimaryKeyLookupQuery(Table table, List<SelectItem> selectItems, Column primaryKeyColumn, Object keyValue) {
        HTableInterface hTable = _tablePool.getTable(table.getName());
        Get get = new Get(ByteUtils.toBytes(keyValue));
        try {
            Result result = hTable.get(get);
            DataSetHeader header = new SimpleDataSetHeader(selectItems);
            Row row = new HBaseRow(header, result);
            return row;
        } catch (IOException e) {
            throw new IllegalStateException("Failed to execute HBase get operation with " + primaryKeyColumn.getName() + " = " + keyValue, e);
        } finally {
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        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();
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            }

            @Override
            protected Row executePrimaryKeyLookupQuery(Table table, List<SelectItem> selectItems, Column primaryKeyColumn, Object keyValue) {
                assertEquals("foo", keyValue);
                return new DefaultRow(new SimpleDataSetHeader(selectItems), new Object[] { "hello world" });
            }

            @Override
            protected Schema getMainSchema() throws MetaModelException {
                MutableSchema schema = new MutableSchema(getMainSchemaName());
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        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;
    }
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                                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);
                                }
                            }
                        }
                    }
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        Column col1 = new MutableColumn("Col1", ColumnType.VARCHAR);
        Column col2 = new MutableColumn("Col2", ColumnType.VARCHAR);
        SelectItem s1 = new SelectItem(col1);
        SelectItem s2 = new SelectItem(col2);
        SelectItem[] selectItems = new SelectItem[] { s1, s2 };
        SimpleDataSetHeader header = new SimpleDataSetHeader(selectItems);
        Row row;
        FilterItem c;

        row = new DefaultRow(header, new Object[] { "foo", "bar" });
        c = new FilterItem(s1, OperatorType.DIFFERENT_FROM, s2);
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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
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