Examples with DataCellToJavaConverterFactory org.knime.core.data.convert.java.DataCellToJavaConverterFactory used on opensource projects

Example 6 with DataCellToJavaConverterFactory

use of org.knime.core.data.convert.java.DataCellToJavaConverterFactory 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 7 with DataCellToJavaConverterFactory

use of org.knime.core.data.convert.java.DataCellToJavaConverterFactory in project knime-core by knime.

the class ConverterFactoryDataTypeListCellRenderer method getListCellRendererComponent.

@Override
public Component getListCellRendererComponent(final JList list, final Object value, final int index, final boolean isSelected, final boolean cellHasFocus) {
    // The super method will reset the icon if we call this method
    // last. So we let super do its job first and then we take care
    // that everything is properly set.
    final Component c = super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
    assert c == this;
    if (value instanceof JavaToDataCellConverterFactory<?>) {
        final JavaToDataCellConverterFactory<?> factory = (JavaToDataCellConverterFactory<?>) value;
        setText(factory.getName());
        setIcon(factory.getDestinationType().getIcon());
    } else if (value instanceof DataCellToJavaConverterFactory) {
        final DataCellToJavaConverterFactory<?, ?> factory = (DataCellToJavaConverterFactory<?, ?>) value;
        setText(factory.getName());
    }
    setToolTipText(getText());
    return this;
}

Example 8 with DataCellToJavaConverterFactory

use of org.knime.core.data.convert.java.DataCellToJavaConverterFactory in project knime-core by knime.

the class InFieldsTableModel method getAllowedJavaTypes.

/**
 * {@inheritDoc}
 */
@Override
public Object[] getAllowedJavaTypes(final int row) {
    Object input = getValueAt(row, Column.COLUMN);
    if (input instanceof DataColumnSpec) {
        DataColumnSpec colSpec = (DataColumnSpec) input;
        final Collection<DataCellToJavaConverterFactory<?, ?>> factories = ConverterUtil.getFactoriesForSourceType(colSpec.getType()).stream().filter(factory -> JavaSnippet.getBuildPathFromCache(factory.getIdentifier()) != null).sorted((a, b) -> a.getName().compareToIgnoreCase(b.getName())).collect(Collectors.toList());
        final Object[] array = factories.toArray(new Object[factories.size()]);
        return array;
    } else if (input instanceof FlowVariable) {
        FlowVariable flowVar = (FlowVariable) input;
        TypeConverter typeConversion = TypeProvider.getDefault().getTypeConverter(flowVar.getType());
        return typeConversion.canProvideJavaTypes();
    } else {
        return new Class[0];
    }
}

Example 9 with DataCellToJavaConverterFactory

use of org.knime.core.data.convert.java.DataCellToJavaConverterFactory in project knime-core by knime.

the class InFieldsTableModel method validateJavaTypeColumn.

/**
 * Validate java type in the given row.
 * @param row the row to check
 * @return error message if error occurs
 */
private String validateJavaTypeColumn(final int row) {
    Object value = this.getValueAt(row, Column.JAVA_TYPE);
    if (null == value) {
        return "Please select a value";
    }
    Object input = this.getValueAt(row, Column.COLUMN);
    if (value instanceof DataCellToJavaConverterFactory) {
        if (input instanceof FlowVariable) {
            return "DataCell converters do not work for flow variables.";
        } else if (input instanceof DataColumnSpec) {
            final DataType dataType = ((DataColumnSpec) input).getType();
            if (!dataType.getValueClasses().contains(((DataCellToJavaConverterFactory<?, ?>) value).getSourceType())) {
                return "Input DataCell is incompatible with this java type.";
            }
        }
    // otherwise user has to fix column/flowvar first.
    } else if (value instanceof String) {
        // converter factory id
        final String id = (String) value;
        if (input instanceof DataColumnSpec) {
            final DataColumnSpec colSpec = (DataColumnSpec) input;
            final Optional<DataCellToJavaConverterFactory<?, ?>> factory = ConverterUtil.getDataCellToJavaConverterFactory(id);
            if (!factory.isPresent()) {
                return "Converter with id " + id + " could not be found.";
            }
            if (!colSpec.getType().getValueClasses().contains(factory.get().getSourceType())) {
                // But just in case it does, this will make sure we know.
                return "Selected factory does not support the input type.";
            }
            return null;
        } else if (input instanceof FlowVariable) {
            return "DataCell converters do not work for flow variables.";
        }
    } else if (value instanceof Class) {
        Class<?> javaType = (Class<?>) value;
        if (input instanceof DataColumnSpec) {
            DataColumnSpec colSpec = (DataColumnSpec) input;
            final Collection<?> factories = ConverterUtil.getFactoriesForSourceType(colSpec.getType());
            return factories.isEmpty() ? "The java type \"" + javaType.getSimpleName() + "\" is not supported." : null;
        } else if (input instanceof FlowVariable) {
            FlowVariable flowVar = (FlowVariable) input;
            TypeConverter typeConversion = TypeProvider.getDefault().getTypeConverter(flowVar.getType());
            return typeConversion.canProvideJavaType(javaType) ? null : "The java type \"" + javaType.getSimpleName() + "\" is not supported.";
        }
    } else {
        return "Cannot find type or converter " + value.toString();
    }
    return null;
}

Example 10 with DataCellToJavaConverterFactory

use of org.knime.core.data.convert.java.DataCellToJavaConverterFactory in project knime-core by knime.

the class InFieldsTable method getInColFields.

/**
 * Get the field definitions representing input columns.
 *
 * @return fields representing input columns.
 */
public InColList getInColFields() {
    InColList inCols = new InColList();
    for (int r = 0; r < m_model.getRowCount(); r++) {
        if (!m_model.validateValues(r)) {
            // there are errors in this row
            continue;
        }
        Object value = m_model.getValueAt(r, Column.COLUMN);
        if (value instanceof DataColumnSpec) {
            DataColumnSpec colSpec = (DataColumnSpec) value;
            InCol inCol = new InCol();
            inCol.setKnimeName(colSpec.getName());
            inCol.setJavaName((String) m_model.getValueAt(r, Column.JAVA_FIELD));
            Object javaTypeObject = m_model.getValueAt(r, Column.JAVA_TYPE);
            if (javaTypeObject instanceof DataCellToJavaConverterFactory) {
                inCol.setConverterFactory(colSpec.getType(), (DataCellToJavaConverterFactory) javaTypeObject);
            } else {
                throw new IllegalStateException("Contents of JavaType column need to be DataCellToJavaConverterFactory instances.");
            }
            inCols.add(inCol);
        }
    }
    return inCols;
}