Examples with AbstractCellFactory org.knime.core.data.container.AbstractCellFactory used on opensource projects

Example 1 with AbstractCellFactory

use of org.knime.core.data.container.AbstractCellFactory in project knime-core by knime.

the class PMMLRuleSetPredictorNodeModel method createRearranger.

/**
 * Constructs the {@link ColumnRearranger} for computing the new columns.
 *
 * @param obj The {@link PMMLPortObject} of the preprocessing model.
 * @param spec The {@link DataTableSpec} of the table.
 * @param replaceColumn Should replace the {@code outputColumnName}?
 * @param outputColumnName The output column name (which might be an existing).
 * @param addConfidence Should add the confidence values to a column?
 * @param confidenceColumnName The name of the confidence column.
 * @param validationColumnIdx Index of the validation column, {@code -1} if not specified.
 * @param processConcurrently Should be {@code false} when the statistics are to be computed.
 * @return The {@link ColumnRearranger} computing the result.
 * @throws InvalidSettingsException Problem with rules.
 */
private static ColumnRearranger createRearranger(final PMMLPortObject obj, final DataTableSpec spec, final boolean replaceColumn, final String outputColumnName, final boolean addConfidence, final String confidenceColumnName, final int validationColumnIdx, final boolean processConcurrently) throws InvalidSettingsException {
    List<Node> models = obj.getPMMLValue().getModels(PMMLModelType.RuleSetModel);
    if (models.size() != 1) {
        throw new InvalidSettingsException("Expected exactly on RuleSetModel, but got: " + models.size());
    }
    final PMMLRuleTranslator translator = new PMMLRuleTranslator();
    obj.initializeModelTranslator(translator);
    if (!translator.isScorable()) {
        throw new UnsupportedOperationException("The model is not scorable.");
    }
    final List<PMMLRuleTranslator.Rule> rules = translator.getRules();
    ColumnRearranger ret = new ColumnRearranger(spec);
    final List<DataColumnSpec> targetCols = obj.getSpec().getTargetCols();
    final DataType dataType = targetCols.isEmpty() ? StringCell.TYPE : targetCols.get(0).getType();
    DataColumnSpecCreator specCreator = new DataColumnSpecCreator(outputColumnName, dataType);
    Set<DataCell> outcomes = new LinkedHashSet<>();
    for (Rule rule : rules) {
        DataCell outcome;
        if (dataType.equals(BooleanCell.TYPE)) {
            outcome = BooleanCellFactory.create(rule.getOutcome());
        } else if (dataType.equals(StringCell.TYPE)) {
            outcome = new StringCell(rule.getOutcome());
        } else if (dataType.equals(DoubleCell.TYPE)) {
            try {
                outcome = new DoubleCell(Double.parseDouble(rule.getOutcome()));
            } catch (NumberFormatException e) {
                // ignore
                continue;
            }
        } else if (dataType.equals(IntCell.TYPE)) {
            try {
                outcome = new IntCell(Integer.parseInt(rule.getOutcome()));
            } catch (NumberFormatException e) {
                // ignore
                continue;
            }
        } else if (dataType.equals(LongCell.TYPE)) {
            try {
                outcome = new LongCell(Long.parseLong(rule.getOutcome()));
            } catch (NumberFormatException e) {
                // ignore
                continue;
            }
        } else {
            throw new UnsupportedOperationException("Unknown outcome type: " + dataType);
        }
        outcomes.add(outcome);
    }
    specCreator.setDomain(new DataColumnDomainCreator(outcomes).createDomain());
    DataColumnSpec colSpec = specCreator.createSpec();
    final RuleSelectionMethod ruleSelectionMethod = translator.getSelectionMethodList().get(0);
    final String defaultScore = translator.getDefaultScore();
    final Double defaultConfidence = translator.getDefaultConfidence();
    final DataColumnSpec[] specs;
    if (addConfidence) {
        specs = new DataColumnSpec[] { new DataColumnSpecCreator(DataTableSpec.getUniqueColumnName(ret.createSpec(), confidenceColumnName), DoubleCell.TYPE).createSpec(), colSpec };
    } else {
        specs = new DataColumnSpec[] { colSpec };
    }
    final int oldColumnIndex = replaceColumn ? ret.indexOf(outputColumnName) : -1;
    ret.append(new AbstractCellFactory(processConcurrently, specs) {

        private final List<String> m_values;

        {
            Map<String, List<String>> dd = translator.getDataDictionary();
            m_values = dd.get(targetCols.get(0).getName());
        }

        /**
         * {@inheritDoc}
         */
        @Override
        public DataCell[] getCells(final DataRow row) {
            // See http://www.dmg.org/v4-1/RuleSet.html#Rule
            switch(ruleSelectionMethod.getCriterion().intValue()) {
                case RuleSelectionMethod.Criterion.INT_FIRST_HIT:
                    {
                        Pair<DataCell, Double> resultAndConfidence = selectFirstHit(row);
                        return toCells(resultAndConfidence);
                    }
                case RuleSelectionMethod.Criterion.INT_WEIGHTED_MAX:
                    {
                        Pair<DataCell, Double> resultAndConfidence = selectWeightedMax(row);
                        return toCells(resultAndConfidence);
                    }
                case RuleSelectionMethod.Criterion.INT_WEIGHTED_SUM:
                    {
                        Pair<DataCell, Double> resultAndConfidence = selectWeightedSum(row);
                        return toCells(resultAndConfidence);
                    }
                default:
                    throw new UnsupportedOperationException(ruleSelectionMethod.getCriterion().toString());
            }
        }

        /**
         * Converts the pair to a {@link DataCell} array.
         *
         * @param resultAndConfidence The {@link Pair}.
         * @return The result and possibly the confidence.
         */
        private DataCell[] toCells(final Pair<DataCell, Double> resultAndConfidence) {
            if (!addConfidence) {
                return new DataCell[] { resultAndConfidence.getFirst() };
            }
            if (resultAndConfidence.getSecond() == null) {
                return new DataCell[] { DataType.getMissingCell(), resultAndConfidence.getFirst() };
            }
            return new DataCell[] { new DoubleCell(resultAndConfidence.getSecond()), resultAndConfidence.getFirst() };
        }

        /**
         * Computes the result and the confidence using the weighted sum method.
         *
         * @param row A {@link DataRow}
         * @return The result and the confidence.
         */
        private Pair<DataCell, Double> selectWeightedSum(final DataRow row) {
            final Map<String, Double> scoreToSumWeight = new LinkedHashMap<String, Double>();
            for (String val : m_values) {
                scoreToSumWeight.put(val, 0.0);
            }
            int matchedRuleCount = 0;
            for (final PMMLRuleTranslator.Rule rule : rules) {
                if (rule.getCondition().evaluate(row, spec) == Boolean.TRUE) {
                    ++matchedRuleCount;
                    Double sumWeight = scoreToSumWeight.get(rule.getOutcome());
                    if (sumWeight == null) {
                        throw new IllegalStateException("The score value: " + rule.getOutcome() + " is not in the data dictionary.");
                    }
                    final Double wRaw = rule.getWeight();
                    final double w = wRaw == null ? 0.0 : wRaw.doubleValue();
                    scoreToSumWeight.put(rule.getOutcome(), sumWeight + w);
                }
            }
            double maxSumWeight = Double.NEGATIVE_INFINITY;
            String bestScore = null;
            for (Entry<String, Double> entry : scoreToSumWeight.entrySet()) {
                final double d = entry.getValue().doubleValue();
                if (d > maxSumWeight) {
                    maxSumWeight = d;
                    bestScore = entry.getKey();
                }
            }
            if (bestScore == null || matchedRuleCount == 0) {
                return pair(result(defaultScore), defaultConfidence);
            }
            return pair(result(bestScore), maxSumWeight / matchedRuleCount);
        }

        /**
         * Helper method to create {@link Pair}s.
         *
         * @param f The first element.
         * @param s The second element.
         * @return The new pair.
         */
        private <F, S> Pair<F, S> pair(final F f, final S s) {
            return new Pair<F, S>(f, s);
        }

        /**
         * Computes the result and the confidence using the weighted max method.
         *
         * @param row A {@link DataRow}
         * @return The result and the confidence.
         */
        private Pair<DataCell, Double> selectWeightedMax(final DataRow row) {
            double maxWeight = Double.NEGATIVE_INFINITY;
            PMMLRuleTranslator.Rule bestRule = null;
            for (final PMMLRuleTranslator.Rule rule : rules) {
                if (rule.getCondition().evaluate(row, spec) == Boolean.TRUE) {
                    if (rule.getWeight() > maxWeight) {
                        maxWeight = rule.getWeight();
                        bestRule = rule;
                    }
                }
            }
            if (bestRule == null) {
                return pair(result(defaultScore), defaultConfidence);
            }
            bestRule.setRecordCount(bestRule.getRecordCount() + 1);
            DataCell result = result(bestRule);
            if (validationColumnIdx >= 0) {
                if (row.getCell(validationColumnIdx).equals(result)) {
                    bestRule.setNbCorrect(bestRule.getNbCorrect() + 1);
                }
            }
            Double confidence = bestRule.getConfidence();
            return pair(result, confidence == null ? defaultConfidence : confidence);
        }

        /**
         * Selects the outcome of the rule and converts it to the proper outcome type.
         *
         * @param rule A {@link Rule}.
         * @return The {@link DataCell} representing the result. (May be missing.)
         */
        private DataCell result(final PMMLRuleTranslator.Rule rule) {
            String outcome = rule.getOutcome();
            return result(outcome);
        }

        /**
         * Constructs the {@link DataCell} from its {@link String} representation ({@code outcome}) and its type.
         *
         * @param dataType The expected {@link DataType}
         * @param outcome The {@link String} representation.
         * @return The {@link DataCell}.
         */
        private DataCell result(final String outcome) {
            if (outcome == null) {
                return DataType.getMissingCell();
            }
            try {
                if (dataType.isCompatible(BooleanValue.class)) {
                    return BooleanCellFactory.create(outcome);
                }
                if (IntCell.TYPE.isASuperTypeOf(dataType)) {
                    return new IntCell(Integer.parseInt(outcome));
                }
                if (LongCell.TYPE.isASuperTypeOf(dataType)) {
                    return new LongCell(Long.parseLong(outcome));
                }
                if (DoubleCell.TYPE.isASuperTypeOf(dataType)) {
                    return new DoubleCell(Double.parseDouble(outcome));
                }
                return new StringCell(outcome);
            } catch (NumberFormatException e) {
                return new MissingCell(outcome + "\n" + e.getMessage());
            }
        }

        /**
         * Selects the first rule that matches and computes the confidence and result for the {@code row}.
         *
         * @param row A {@link DataRow}.
         * @return The result and the confidence.
         */
        private Pair<DataCell, Double> selectFirstHit(final DataRow row) {
            for (final PMMLRuleTranslator.Rule rule : rules) {
                Boolean eval = rule.getCondition().evaluate(row, spec);
                if (eval == Boolean.TRUE) {
                    rule.setRecordCount(rule.getRecordCount() + 1);
                    DataCell result = result(rule);
                    if (validationColumnIdx >= 0) {
                        if (row.getCell(validationColumnIdx).equals(result)) {
                            rule.setNbCorrect(rule.getNbCorrect() + 1);
                        }
                    }
                    Double confidence = rule.getConfidence();
                    return pair(result, confidence == null ? defaultConfidence : confidence);
                }
            }
            return pair(result(defaultScore), defaultConfidence);
        }

        /**
         * {@inheritDoc}
         */
        @Override
        public void afterProcessing() {
            super.afterProcessing();
            obj.getPMMLValue();
            RuleSetModel ruleSet = translator.getOriginalRuleSetModel();
            assert rules.size() == ruleSet.getRuleSet().getSimpleRuleList().size() + ruleSet.getRuleSet().getCompoundRuleList().size();
            if (ruleSet.getRuleSet().getSimpleRuleList().size() == rules.size()) {
                for (int i = 0; i < rules.size(); ++i) {
                    Rule rule = rules.get(i);
                    final SimpleRule simpleRuleArray = ruleSet.getRuleSet().getSimpleRuleArray(i);
                    synchronized (simpleRuleArray) /*synchronized fixes AP-6766 */
                    {
                        simpleRuleArray.setRecordCount(rule.getRecordCount());
                        if (validationColumnIdx >= 0) {
                            simpleRuleArray.setNbCorrect(rule.getNbCorrect());
                        } else if (simpleRuleArray.isSetNbCorrect()) {
                            simpleRuleArray.unsetNbCorrect();
                        }
                    }
                }
            }
        }
    });
    if (replaceColumn) {
        ret.remove(outputColumnName);
        ret.move(ret.getColumnCount() - 1 - (addConfidence ? 1 : 0), oldColumnIndex);
    }
    return ret;
}

Example 2 with AbstractCellFactory

use of org.knime.core.data.container.AbstractCellFactory in project knime-core by knime.

the class NumericOutliersReviser method replaceOutliers.

/**
 * Replaces outliers found in the row input according to the selected replacement option. Additionally, the outlier
 * replacement counts and new domains are calculated.
 *
 * @param exec the execution context
 * @param in the row input whose outliers have to be treated
 * @param out the row output whose outliers have been treated
 * @param outlierModel the model storing the permitted intervals
 * @param memberCounter the member counter
 * @param outlierRepCounter the outlier replacement counter
 * @param missingGroupsCounter the missing groups counter
 * @throws Exception any exception to indicate an error, cancelation
 */
private void replaceOutliers(final ExecutionContext exec, final RowInput in, final RowOutput out, final NumericOutliersModel outlierModel, final MemberCounter memberCounter, final MemberCounter outlierRepCounter, final MemberCounter missingGroupsCounter) throws Exception {
    // total number of outlier columns
    final int noOutliers = m_outlierColNames.length;
    // the in table spec
    final DataTableSpec inSpec = in.getDataTableSpec();
    // create column re-arranger to overwrite cells corresponding to outliers
    final ColumnRearranger colRearranger = new ColumnRearranger(inSpec);
    // store the positions where the outlier column names can be found in the input table
    final int[] outlierIndices = calculateOutlierIndicies(inSpec);
    final DataColumnSpec[] outlierSpecs = new DataColumnSpec[noOutliers];
    for (int i = 0; i < noOutliers; i++) {
        outlierSpecs[i] = inSpec.getColumnSpec(outlierIndices[i]);
    }
    // values are copied anyways by the re-arranger so there is no need to
    // create new instances for each row
    final DataCell[] treatedVals = new DataCell[noOutliers];
    final AbstractCellFactory fac = new AbstractCellFactory(true, outlierSpecs) {

        @Override
        public DataCell[] getCells(final DataRow row) {
            final GroupKey key = outlierModel.getKey(row, inSpec);
            final Map<String, double[]> colsMap = outlierModel.getGroupIntervals(key);
            for (int i = 0; i < noOutliers; i++) {
                final DataCell curCell = row.getCell(outlierIndices[i]);
                final DataCell treatedCell;
                final String outlierColName = m_outlierColNames[i];
                if (!curCell.isMissing()) {
                    // if the key exists treat the value otherwise we process an unkown group
                    if (colsMap != null) {
                        // increment the member counter
                        memberCounter.incrementMemberCount(outlierColName, key);
                        // treat the value of the cell if its a outlier
                        treatedCell = treatCellValue(colsMap.get(outlierColName), curCell);
                    } else {
                        missingGroupsCounter.incrementMemberCount(outlierColName, key);
                        treatedCell = curCell;
                    }
                } else {
                    treatedCell = curCell;
                }
                // if we changed the value this is an outlier
                if (!treatedCell.equals(curCell)) {
                    outlierRepCounter.incrementMemberCount(outlierColName, key);
                }
                // update the domain if necessary
                if (m_updateDomain && !treatedCell.isMissing()) {
                    m_domainUpdater.updateDomain(outlierColName, ((DoubleValue) treatedCell).getDoubleValue());
                }
                treatedVals[i] = treatedCell;
            }
            return treatedVals;
        }
    };
    // replace the outlier columns by their updated versions
    colRearranger.replace(fac, outlierIndices);
    // stream it
    colRearranger.createStreamableFunction().runFinal(new PortInput[] { in }, new PortOutput[] { out }, exec);
    exec.setProgress(1);
}

Example 3 with AbstractCellFactory

use of org.knime.core.data.container.AbstractCellFactory in project knime-core by knime.

the class DateTimeDifferenceNodeModel method createColumnRearranger.

private ColumnRearranger createColumnRearranger(final DataTableSpec spec) throws InvalidSettingsException {
    final ColumnRearranger rearranger = new ColumnRearranger(spec);
    final ZonedDateTime fixedDateTime;
    if (m_modusSelectModel.getStringValue().equals(ModusOptions.UseExecutionTime.name())) {
        fixedDateTime = ZonedDateTime.now();
    } else if (m_modusSelectModel.getStringValue().equals(ModusOptions.UseFixedTime.name())) {
        fixedDateTime = m_fixedDateTimeModel.getZonedDateTime();
    } else {
        fixedDateTime = null;
    }
    final int colIdx1 = spec.findColumnIndex(m_col1stSelectModel.getStringValue());
    final int colIdx2 = spec.findColumnIndex(m_col2ndSelectModel.getStringValue());
    final AbstractCellFactory cellFac;
    final DataType type = spec.getColumnSpec(colIdx1).getType();
    if (type.isCompatible(LocalDateValue.class)) {
        cellFac = new DateDifferenceCellFactory(colIdx1, colIdx2, fixedDateTime == null ? null : fixedDateTime.toLocalDate(), createColumnSpec(spec));
    } else {
        cellFac = new TimeDifferenceCellFactory(colIdx1, colIdx2, fixedDateTime, createColumnSpec(spec));
    }
    rearranger.append(cellFac);
    return rearranger;
}

Example 4 with AbstractCellFactory

use of org.knime.core.data.container.AbstractCellFactory in project knime-core by knime.

the class AppendVariableToTableNodeModel method createColumnRearranger.

private ColumnRearranger createColumnRearranger(final DataTableSpec spec) throws InvalidSettingsException {
    ColumnRearranger arranger = new ColumnRearranger(spec);
    Set<String> nameHash = new HashSet<String>();
    for (DataColumnSpec c : spec) {
        nameHash.add(c.getName());
    }
    List<Pair<String, FlowVariable.Type>> vars;
    if (m_settings.getIncludeAll()) {
        vars = getAllVariables();
    } else {
        vars = m_settings.getVariablesOfInterest();
    }
    if (vars.isEmpty()) {
        throw new InvalidSettingsException("No variables selected");
    }
    DataColumnSpec[] specs = new DataColumnSpec[vars.size()];
    final DataCell[] values = new DataCell[vars.size()];
    for (int i = 0; i < vars.size(); i++) {
        Pair<String, FlowVariable.Type> c = vars.get(i);
        String name = c.getFirst();
        DataType type;
        switch(c.getSecond()) {
            case DOUBLE:
                type = DoubleCell.TYPE;
                try {
                    double dValue = peekFlowVariableDouble(name);
                    values[i] = new DoubleCell(dValue);
                } catch (NoSuchElementException e) {
                    throw new InvalidSettingsException("No such flow variable (of type double): " + name);
                }
                break;
            case INTEGER:
                type = IntCell.TYPE;
                try {
                    int iValue = peekFlowVariableInt(name);
                    values[i] = new IntCell(iValue);
                } catch (NoSuchElementException e) {
                    throw new InvalidSettingsException("No such flow variable (of type int): " + name);
                }
                break;
            case STRING:
                type = StringCell.TYPE;
                try {
                    String sValue = peekFlowVariableString(name);
                    sValue = sValue == null ? "" : sValue;
                    values[i] = new StringCell(sValue);
                } catch (NoSuchElementException e) {
                    throw new InvalidSettingsException("No such flow variable (of type String): " + name);
                }
                break;
            default:
                throw new InvalidSettingsException("Unsupported variable type: " + c.getSecond());
        }
        if (nameHash.contains(name) && !name.toLowerCase().endsWith("(variable)")) {
            name = name.concat(" (variable)");
        }
        String newName = name;
        int uniquifier = 1;
        while (!nameHash.add(newName)) {
            newName = name + " (#" + (uniquifier++) + ")";
        }
        specs[i] = new DataColumnSpecCreator(newName, type).createSpec();
    }
    arranger.append(new AbstractCellFactory(specs) {

        /**
         * {@inheritDoc}
         */
        @Override
        public DataCell[] getCells(final DataRow row) {
            return values;
        }
    });
    return arranger;
}

Example 5 with AbstractCellFactory

use of org.knime.core.data.container.AbstractCellFactory in project knime-core by knime.

the class KnnNodeModel method createRearranger.

/*
     * @param maxRows - can be -1 if can't be determined (streaming)
     */
private ColumnRearranger createRearranger(final DataTableSpec in, final DataColumnSpec classColumnSpec, final List<Integer> featureColumns, final Map<Integer, Integer> firstToSecond, final KDTree<DataCell> tree, final double maxRows) {
    ColumnRearranger c = new ColumnRearranger(in);
    String newName = "Class [kNN]";
    while (in.containsName(newName)) {
        newName += "_dup";
    }
    List<DataColumnSpec> colSpecs = new ArrayList<DataColumnSpec>();
    DataColumnSpecCreator crea = new DataColumnSpecCreator(classColumnSpec);
    crea.setName(newName);
    colSpecs.add(crea.createSpec());
    final DataCell[] possibleValues;
    if (m_settings.outputClassProbabilities()) {
        possibleValues = classColumnSpec.getDomain().getValues().toArray(new DataCell[0]);
        Arrays.sort(possibleValues, new Comparator<DataCell>() {

            @Override
            public int compare(final DataCell o1, final DataCell o2) {
                return o1.toString().compareTo(o2.toString());
            }
        });
        for (DataCell posVal : possibleValues) {
            newName = posVal.toString();
            while (in.containsName(newName)) {
                newName += "_dup";
            }
            crea = new DataColumnSpecCreator(newName, DoubleCell.TYPE);
            colSpecs.add(crea.createSpec());
        }
    } else {
        possibleValues = new DataCell[0];
    }
    final DataColumnSpec[] colSpecArray = colSpecs.toArray(new DataColumnSpec[colSpecs.size()]);
    c.append(new AbstractCellFactory(colSpecArray) {

        /**
         * {@inheritDoc}
         */
        @Override
        public void setProgress(final long curRowNr, final long rowCount, final RowKey lastKey, final ExecutionMonitor exec) {
            if (maxRows > 0) {
                exec.setProgress(curRowNr / maxRows, "Classifying row " + lastKey);
            } else {
                exec.setProgress("Classifying row " + lastKey);
            }
        }

        @Override
        public DataCell[] getCells(final DataRow row) {
            List<DataCell> output = classify(row, tree, featureColumns, firstToSecond, possibleValues);
            return output.toArray(new DataCell[output.size()]);
        }
    });
    return c;
}