Examples with FlowVariable org.knime.core.node.workflow.FlowVariable used on opensource projects

Example 41 with FlowVariable

use of org.knime.core.node.workflow.FlowVariable in project knime-core by knime.

the class JavaSnippetCellFactory method getCells.

/**
 * {@inheritDoc}
 */
@SuppressWarnings("unchecked")
@Override
public DataCell[] getCells(final DataRow row) {
    try {
        if (null == m_jsnippet) {
            m_jsnippet = m_snippet.createSnippetInstance();
            // populate the fields in the m_jsnippet that are constant
            // across the rows.
            Field[] fs = m_jsnippet.getClass().getSuperclass().getDeclaredFields();
            for (Field field : fs) {
                if (field.getName().equals("m_flowVars")) {
                    field.setAccessible(true);
                    field.set(m_jsnippet, m_flowVars);
                }
                if (field.getName().equals(JavaSnippet.ROWCOUNT)) {
                    field.setAccessible(true);
                    field.set(m_jsnippet, m_rowCount);
                }
            }
        }
        // populate data structure with the input cells
        Map<String, Cell> cellsMap = createCellsMap(row);
        if (null == m_columns) {
            m_columns = new ArrayList<>();
            m_columns.addAll(cellsMap.keySet());
        }
        Field[] fs = m_jsnippet.getClass().getSuperclass().getDeclaredFields();
        for (Field field : fs) {
            if (field.getName().equals("m_cellsMap")) {
                field.setAccessible(true);
                field.set(m_jsnippet, cellsMap);
            }
            if (field.getName().equals("m_cells")) {
                field.setAccessible(true);
                List<Cell> cells = new ArrayList<>();
                cells.addAll(cellsMap.values());
                field.set(m_jsnippet, cells);
            }
            if (field.getName().equals("m_columns")) {
                field.setAccessible(true);
                field.set(m_jsnippet, m_columns);
            }
            if (field.getName().equals("m_inSpec")) {
                field.setAccessible(true);
                field.set(m_jsnippet, m_spec);
            }
            if (field.getName().equals(JavaSnippet.ROWID)) {
                field.setAccessible(true);
                field.set(m_jsnippet, row.getKey().getString());
            }
            if (field.getName().equals(JavaSnippet.ROWINDEX)) {
                field.setAccessible(true);
                field.set(m_jsnippet, m_rowIndex);
            }
        }
        // populate the system input column fields with data
        for (InCol inCol : m_snippet.getSystemFields().getInColFields()) {
            Field field = m_jsnippet.getClass().getField(inCol.getJavaName());
            final DataCell cell = row.getCell(m_spec.findColumnIndex(inCol.getKnimeName()));
            if (cell.isMissing()) {
                field.set(m_jsnippet, null);
                continue;
            }
            // Get the converter factory for this column
            final Optional<DataCellToJavaConverterFactory<?, ?>> factory = ConverterUtil.getDataCellToJavaConverterFactory(inCol.getConverterFactoryId());
            if (!factory.isPresent()) {
                throw new RuntimeException("Missing converter factory with ID: " + inCol.getConverterFactoryId());
            }
            final Object converted = factory.get().create().convertUnsafe(cell);
            field.set(m_jsnippet, converted);
        }
        // reset the system output fields to null (see also bug 3781)
        for (OutCol outCol : m_snippet.getSystemFields().getOutColFields()) {
            Field field = m_jsnippet.getClass().getField(outCol.getJavaName());
            field.set(m_jsnippet, null);
        }
        // populate the system input flow variable fields with data
        for (InVar inCol : m_snippet.getSystemFields().getInVarFields()) {
            Field field = m_jsnippet.getClass().getField(inCol.getJavaName());
            Object v = m_flowVars.getValueOfType(inCol.getKnimeName(), inCol.getJavaType());
            field.set(m_jsnippet, v);
        }
    } catch (Exception e) {
        // re-throw exception
        throw new RuntimeException(e);
    }
    try {
        // evaluate user script
        m_jsnippet.snippet();
    } catch (Throwable thr) {
        if (thr instanceof Abort) {
            StringBuilder builder = new StringBuilder("Calculation aborted: ");
            String message = thr.getMessage();
            builder.append(message == null ? "<no details>" : message);
            throw new RuntimeException(builder.toString(), thr);
        } else {
            Integer lineNumber = null;
            for (StackTraceElement ste : thr.getStackTrace()) {
                if (ste.getClassName().equals("JSnippet")) {
                    lineNumber = ste.getLineNumber();
                }
            }
            StringBuilder msg = new StringBuilder();
            msg.append("Evaluation of java snippet failed for row \"");
            msg.append(row.getKey());
            msg.append("\". ");
            if (lineNumber != null) {
                msg.append("The exception is caused by line ");
                msg.append(lineNumber);
                msg.append(" of the snippet. ");
            }
            if (thr.getMessage() != null) {
                msg.append("Exception message:");
                msg.append(thr.getMessage());
            }
            LOGGER.warn(msg.toString(), thr);
            OutVarList outVars = m_snippet.getSystemFields().getOutVarFields();
            if (outVars.size() > 0) {
                // Abort if flow variables are defined
                throw new RuntimeException("An error occured in an " + "expression with output flow variables.", thr);
            }
            OutColList outFields = m_snippet.getSystemFields().getOutColFields();
            DataCell[] out = new DataCell[outFields.size()];
            for (int i = 0; i < out.length; i++) {
                // Return missing values for output fields
                out[i] = DataType.getMissingCell();
            }
            m_rowIndex++;
            return out;
        }
    }
    try {
        // update m_flowVars with output flow variable fields.
        for (OutVar var : m_snippet.getSystemFields().getOutVarFields()) {
            Field field = m_jsnippet.getClass().getField(var.getJavaName());
            Object value = field.get(m_jsnippet);
            if (null != value) {
                Type type = var.getFlowVarType();
                FlowVariable flowVar = null;
                if (type.equals(Type.INTEGER)) {
                    flowVar = new FlowVariable(var.getKnimeName(), (Integer) value);
                } else if (type.equals(Type.DOUBLE)) {
                    flowVar = new FlowVariable(var.getKnimeName(), (Double) value);
                } else {
                    // case type.equals(Type.String)
                    flowVar = new FlowVariable(var.getKnimeName(), (String) value);
                }
                m_flowVars.put(flowVar);
            } else {
                throw new RuntimeException("Flow variable \"" + var.getKnimeName() + "\" has no value.");
            }
        }
        // get output column fields
        OutColList outFields = m_snippet.getSystemFields().getOutColFields();
        DataCell[] out = new DataCell[outFields.size()];
        for (int i = 0; i < out.length; i++) {
            OutCol outField = outFields.get(i);
            Field field = m_jsnippet.getClass().getField(outField.getJavaName());
            Object value = field.get(m_jsnippet);
            if (null == value) {
                out[i] = DataType.getMissingCell();
            } else {
                final String id = outField.getConverterFactoryId();
                Optional<JavaToDataCellConverterFactory<?>> factory = ConverterUtil.getJavaToDataCellConverterFactory(id);
                if (!factory.isPresent()) {
                    throw new RuntimeException("Missing converter factory with ID: " + id);
                }
                out[i] = ((JavaToDataCellConverterFactory<Object>) factory.get()).create(m_context).convert(value);
            }
        }
        // Cleanup Closeable inputs
        for (final OutCol outCol : m_snippet.getSystemFields().getOutColFields()) {
            final Field field = m_jsnippet.getClass().getField(outCol.getJavaName());
            final Object value = field.get(m_jsnippet);
            if (value instanceof Closeable) {
                ((Closeable) value).close();
            }
            if (value instanceof AutoCloseable) {
                // From the doc: Calling close more than once *can* have visible side effects!
                ((AutoCloseable) value).close();
            }
        }
        m_rowIndex++;
        return out;
    } catch (Exception e) {
        // but in case re-throw exception
        throw new RuntimeException(e);
    }
}

Example 42 with FlowVariable

use of org.knime.core.node.workflow.FlowVariable in project knime-core by knime.

the class JavaEditVarNodeModel method performExecute.

/**
 */
private void performExecute(final ExecutionContext exec) {
    FlowVariableRepository flowVarRepo = new FlowVariableRepository(getAvailableInputFlowVariables());
    m_snippet.execute(flowVarRepo, exec);
    for (FlowVariable var : flowVarRepo.getModified()) {
        Type type = var.getType();
        if (type.equals(Type.INTEGER)) {
            pushFlowVariableInt(var.getName(), var.getIntValue());
        } else if (type.equals(Type.DOUBLE)) {
            pushFlowVariableDouble(var.getName(), var.getDoubleValue());
        } else {
            // case: type.equals(Type.STRING)
            pushFlowVariableString(var.getName(), var.getStringValue());
        }
    }
}

Example 43 with FlowVariable

use of org.knime.core.node.workflow.FlowVariable in project knime-core by knime.

the class AddOutFieldDialog method initKnimeNameComboBox.

/**
 * Initialize the selection list for the knime name.
 */
private void initKnimeNameComboBox() {
    m_replacedKnimeName.removeAllItems();
    if (m_fieldType.getSelectedItem().equals(FieldType.Column)) {
        for (DataColumnSpec colSpec : m_spec) {
            m_replacedKnimeName.addItem(colSpec);
        }
        m_replacedKnimeName.setRenderer(new DataColumnSpecListCellRenderer());
    } else {
        for (FlowVariable flowVar : m_flowVars.values()) {
            // created.
            if (OutFieldsTableModel.verifyNameOfFlowVariable(flowVar.getName())) {
                m_replacedKnimeName.addItem(flowVar);
            }
        }
        m_replacedKnimeName.setRenderer(new FlowVariableListCellRenderer());
    }
    if (m_replacedKnimeName.getItemCount() <= 0) {
        m_replacedKnimeName.setEnabled(false);
        m_knimeName.setEnabled(true);
        m_replace.setEnabled(false);
        m_replace.setSelected(false);
        m_append.setSelected(true);
    } else {
        m_replacedKnimeName.setEnabled(true);
        m_replace.setEnabled(true);
    }
}

Example 44 with FlowVariable

use of org.knime.core.node.workflow.FlowVariable in project knime-core by knime.

the class OutFieldsTable method getTargetFieldName.

/**
 * Returns a name under which the output column or flow variable can be accessed or defined in the target script
 *
 * @param row the row to check
 * @return the target name
 */
public String getTargetFieldName(final int row) {
    // TODO make abstract, implement in concrete class in JS view
    boolean isVariable = -1 == m_model.getIndex(Column.FIELD_TYPE) || m_model.getValueAt(row, Column.FIELD_TYPE).equals(FieldType.FlowVariable);
    Object v = m_model.getValueAt(row, Column.COLUMN);
    String knimeName;
    if (v instanceof FlowVariable) {
        knimeName = ((FlowVariable) v).getName();
    } else if (v instanceof String) {
        knimeName = (String) v;
    } else {
        return null;
    }
    if (isVariable) {
        return "FLOW_VARIABLES[\"" + knimeName + "\"]";
    } else {
        return "OUT_COLUMNS[\"" + knimeName + "\"]";
    }
}

Example 45 with FlowVariable

use of org.knime.core.node.workflow.FlowVariable in project knime-core by knime.

the class VariableToTable2NodeModel method getVariablesOfInterest.

private List<Pair<String, FlowVariable.Type>> getVariablesOfInterest() {
    List<Pair<String, FlowVariable.Type>> result = new ArrayList<Pair<String, FlowVariable.Type>>();
    if (m_filter != null) {
        String[] names = m_filter.applyTo(getAvailableFlowVariables()).getIncludes();
        Map<String, FlowVariable> vars = getAvailableFlowVariables();
        for (String name : names) {
            result.add(new Pair<String, FlowVariable.Type>(name, vars.get(name).getType()));
        }
    }
    return result;
}