Examples with Constraint org.pentaho.metadata.query.model.Constraint used on opensource projects

Example 1 with Constraint

use of org.pentaho.metadata.query.model.Constraint in project data-access by pentaho.

the class MetadataServiceUtil method convertQuery.

/**
 * Converts a thin query model into a full query
 *
 * @param src
 * @return
 */
public org.pentaho.metadata.query.model.Query convertQuery(Query src) {
    IMetadataDomainRepository domainRepository = getMetadataRepository();
    Domain fullDomain = domainRepository.getDomain(src.getDomainName());
    LogicalModel logicalModel = fullDomain.findLogicalModel(src.getModelId());
    // create a new full query object
    org.pentaho.metadata.query.model.Query dest = new org.pentaho.metadata.query.model.Query(fullDomain, logicalModel);
    // now add the selections
    List<Selection> selections = dest.getSelections();
    for (Column column : src.getColumns()) {
        // get the objects needed for the selection
        LogicalColumn logicalColumn = logicalModel.findLogicalColumn(column.getId());
        org.pentaho.metadata.model.Category category = getCategory(column.getId(), logicalModel);
        AggregationType aggregationType = AggregationType.valueOf(column.getSelectedAggType());
        // create a selection and add it to the list
        Selection selection = new Selection(category, logicalColumn, aggregationType);
        selections.add(selection);
    }
    // now add the filters
    List<Constraint> constraints = dest.getConstraints();
    for (Condition condition : src.getConditions()) {
        org.pentaho.metadata.query.model.CombinationType combinationType = CombinationType.valueOf(condition.getCombinationType());
        LogicalColumn logicalColumn = logicalModel.findLogicalColumn(condition.getColumn());
        String paramName = null;
        for (Parameter parameter : src.getParameters()) {
            if (parameter.getColumn().equals(condition.getColumn())) {
                paramName = parameter.getName() == null ? parameter.getColumn() : parameter.getName();
            }
        }
        // condition.setParameterized(parameterized);
        String formula = condition.getCondition(logicalColumn.getDataType().name(), paramName);
        Constraint constraint = new Constraint(combinationType, formula);
        constraints.add(constraint);
    }
    // now set the disable distinct option
    if (src.getDisableDistinct() != null) {
        dest.setDisableDistinct(src.getDisableDistinct());
    }
    // now add the sorting information
    List<org.pentaho.metadata.query.model.Order> orders = dest.getOrders();
    for (Order order : src.getOrders()) {
        // find the selection
        for (Selection selection : selections) {
            if (selection.getLogicalColumn().getId().equals(order.getColumn())) {
                Type type = Type.valueOf(order.getOrderType());
                org.pentaho.metadata.query.model.Order fullOrder = new org.pentaho.metadata.query.model.Order(selection, type);
                orders.add(fullOrder);
            }
        }
    }
    // now add the parameter information
    List<org.pentaho.metadata.query.model.Parameter> parameters = dest.getParameters();
    for (Parameter parameter : src.getParameters()) {
        // find the column for this parameter
        LogicalColumn logicalColumn = logicalModel.findLogicalColumn(parameter.getColumn());
        DataType type = logicalColumn.getDataType();
        String[] value = parameter.getValue();
        org.pentaho.metadata.query.model.Parameter fullParam = new org.pentaho.metadata.query.model.Parameter(parameter.getColumn(), type, value[0]);
        parameters.add(fullParam);
    }
    return dest;
}