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de.bund.bfr.knime.pmm.nodes/src/de/bund/bfr/knime/pmm/js/modelplotter/ModelPlotterNodeModel.java

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/*******************************************************************************
 * Copyright (c) 2015 Federal Institute for Risk Assessment (BfR), Germany
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Contributors:
 *     Department Biological Safety - BfR
 *******************************************************************************/
package de.bund.bfr.knime.pmm.js.modelplotter;

import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.knime.core.data.DataColumnSpec;
import org.knime.core.data.DataColumnSpecCreator;
import org.knime.core.data.DataTable;
import org.knime.core.data.DataTableSpec;
import org.knime.core.data.RowKey;
import org.knime.core.data.def.DefaultRow;
import org.knime.core.data.def.DoubleCell;
import org.knime.core.data.def.StringCell;
import org.knime.core.node.BufferedDataContainer;
import org.knime.core.node.BufferedDataTable;
import org.knime.core.node.ExecutionContext;
import org.knime.core.node.InvalidSettingsException;
import org.knime.core.node.NodeLogger;
import org.knime.core.node.NodeSettingsRO;
import org.knime.core.node.NodeSettingsWO;
import org.knime.core.node.port.PortObject;
import org.knime.core.node.port.PortType;
import org.knime.core.node.web.ValidationError;
import org.knime.js.core.node.AbstractWizardNodeModel;

import de.bund.bfr.knime.pmm.common.chart.Plotable;
import de.bund.bfr.knime.pmm.common.generictablemodel.KnimeTuple;
import de.bund.bfr.knime.pmm.common.pmmtablemodel.PmmUtilities;
import de.bund.bfr.knime.pmm.common.pmmtablemodel.SchemaFactory;
import de.bund.bfr.knime.pmm.js.modelplotter.ModelPlotterViewValue.Variable;
//import de.bund.bfr.knime.pmm.js.modelplotter.modern.ModelPlotterViewRepresentation.Variable;
import de.bund.bfr.knime.pmm.predictorview.TableReader;

/**
 * Model Plotter node model.
 * Reading all plotables functions of input table and preparing the first plotable for 
 * JavaScript view. 
 * 
 * @author Kilian Thiel, KNIME.com AG, Berlin, Germany
 *
 */
public final class ModelPlotterNodeModel extends AbstractWizardNodeModel<ModelPlotterViewRepresentation, ModelPlotterViewValue> {

    private static final NodeLogger LOGGER = NodeLogger.getLogger(ModelPlotterNodeModel.class);
    
    static final String FLOWVAR_FUNCTION_ORIG = "Original Function";
    static final String FLOWVAR_FUNCTION_FULL = "Full Function";
    static final String FLOWVAR_FUNCTION_APPLIED = "Applied Function";
    
    private static final String PMM_MODEL_ARG_TIME = "Time";
    private static final String PMM_MODEL_ARG_TEMP = "temp";
    private static final String PMM_MODEL_ARG_AW = "aw";
    private static final String PMM_MODEL_ARG_CO2 = "CO2";
    private static final String PMM_MODEL_ARG_PS = "PhysiologicalState";
    private static final String PMM_MODEL_ARG_PH = "pH";
    
    private final ModelPlotterViewConfig m_config;
    
    private boolean m_executed = false;
    
    /**
     * Constructor of {@code ModelPlotterNodeModel}.
     */
    protected ModelPlotterNodeModel() {
        super(new PortType[] { BufferedDataTable.TYPE }, 
              new PortType[] { BufferedDataTable.TYPE, BufferedDataTable.TYPE }, 
              (new ModelPlotterNodeFactory()).getInteractiveViewName());
        m_config = new ModelPlotterViewConfig();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public ModelPlotterViewRepresentation createEmptyViewRepresentation() {
        return new ModelPlotterViewRepresentation();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public ModelPlotterViewValue createEmptyViewValue() {
        return new ModelPlotterViewValue();
    }

    @Override
    public String getJavascriptObjectID() {
        return "de.bund.bfr.knime.pmm.js.modelplotter";
    }

    @Override
    public boolean isHideInWizard() {
        return m_config.getHideInwizard();
    }

    @Override
    public ValidationError validateViewValue(ModelPlotterViewValue viewContent) {
        synchronized (getLock()) {
            // Nothing to do.
        }
        return null;
    }

    @Override
    public void saveCurrentValue(NodeSettingsWO content) {
        // Nothing to do.
    }

    @Override
    protected DataTableSpec[] configure(DataTableSpec[] inSpecs)
            throws InvalidSettingsException {
        if (!SchemaFactory.createM1Schema()
                .conforms((DataTableSpec) inSpecs[0])) {
            throw new InvalidSettingsException("Wrong input!");
        }
        
        return createOutputDataTableSpecs();
    }
    
    /* (non-Javadoc)
     * @see org.knime.js.core.node.AbstractWizardNodeModel#performExecute(org.knime.core.node.port.PortObject[], org.knime.core.node.ExecutionContext)
     */
    @Override
    protected PortObject[] performExecute(PortObject[] inObjects,
            ExecutionContext exec) throws Exception {
        
        BufferedDataTable table = (BufferedDataTable)inObjects[0];
        TableReader reader = new TableReader(
                ModelPlotterNodeModel.getTuples(table),
                new LinkedHashMap<String, String>(),
                new LinkedHashMap<String, String>(), true);
        
        // read all plotables
        Map<String, Plotable> plotables = reader.getPlotables();
        Plotable p;
        
        // warn if more than one plotables
        if (plotables.size() <= 0) {
            setWarningMessage("No model functions to plot in input data table!");
            LOGGER.error("No model functions to plot in input data table!");
            throw new IllegalStateException("No model functions to plot in input data table!");
        } else if (plotables.size() > 1) {
            setWarningMessage("More than one model function to plot in input data table."
                    + " Plotting first function only.");
        }
        
        // get first plotable
        p = plotables.entrySet().iterator().next().getValue();
        
        ModelPlotterViewValue viewValue = getViewValue();
        if (viewValue == null) {
            viewValue = createEmptyViewValue();
            setViewValue(viewValue);
        }
        if (!m_executed) {
            // CONFIG of JavaScript view
            viewValue.setChartTitle(m_config.getChartTitle());
            viewValue.setY0(m_config.getY0());
            viewValue.setMinXAxis(m_config.getMinXAxis());
            viewValue.setMaxXAxis(m_config.getMaxXAxis());
            viewValue.setMinYAxis(m_config.getMinYAxis());
            viewValue.setMaxYAxis(m_config.getMaxYAxis());

            // set units
            viewValue.setxUnit(p.getUnits().get("Time"));
            viewValue.setyUnit(p.getUnits().get("Value"));

            // DATA: specify function (substring after '=')
            viewValue.setFunc(p.getFunction().substring(
                    p.getFunction().indexOf("=") + 1));

            // DATA: specify arguments that can be adjusted via sliders in
            // JavaScript view
            List<Variable> variables = new LinkedList<>();
            Map<String, List<Double>> args = p.getFunctionArguments();
            for (Map.Entry<String, List<Double>> a : args.entrySet()) {
                // ignore time argument
                if (!a.getKey().equals(PMM_MODEL_ARG_TIME)) {
                    Variable v = new Variable();
                    v.setName(a.getKey());

                    // set min value
                    Double min = p.getMinArguments().get(a.getKey());
                    if (min == null) {
                        min = 0.0;
                    }
                    v.setMin(min);

                    // set max value
                    Double max = p.getMaxArguments().get(a.getKey());
                    if (max == null) {
                        max = 0.0;
                    }
                    v.setMax(max);

                    // set default value (different for each argument)
                    if (a.getKey().equals(PMM_MODEL_ARG_AW)) {
                        v.setDef(0.997);
                    } else if (a.getKey().equals(PMM_MODEL_ARG_CO2)) {
                        v.setDef(0);
                    } else if (a.getKey().equals(PMM_MODEL_ARG_PH)) {
                        v.setDef(7.0);
                    } else if (a.getKey().equals(PMM_MODEL_ARG_PS)) {
                        v.setDef(0.0005);
                    } else if (a.getKey().equals(PMM_MODEL_ARG_TEMP)) {
                        v.setDef(20);
                    }

                    // add variable
                    variables.add(v);
                }
            }
            viewValue.setVariables(variables);

            // DATA: specify constants and values
            Map<String, Double> constants = new HashMap<>();
            Map<String, Double> params = p.getFunctionParameters();
            for (Map.Entry<String, Double> param : params.entrySet()) {
                Double val = param.getValue();
                if (val == null) {
                    val = 0.0;
                }
                constants.put(param.getKey(), val);
            }
            viewValue.setConstants(constants);
            
            setViewValue(viewValue);
            m_executed = true;
        }        
        
        exec.setProgress(1);
        
        pushFlowVariableString(FLOWVAR_FUNCTION_ORIG, getViewValue().getFunc());
        pushFlowVariableString(FLOWVAR_FUNCTION_FULL, getViewValue().getFunctionFull());        
        return createOutputDataTables(exec);
    }

    private DataTableSpec[] createOutputDataTableSpecs() {
        DataColumnSpec constantName = new DataColumnSpecCreator(
                "Constant name", StringCell.TYPE).createSpec();
        DataColumnSpec constantValue = new DataColumnSpecCreator(
                "Constant value", DoubleCell.TYPE).createSpec();
        DataTableSpec constantSpec = new DataTableSpec(constantName, constantValue);
        
        DataColumnSpec varName = new DataColumnSpecCreator(
                "Variable name", StringCell.TYPE).createSpec();
        DataColumnSpec varValue = new DataColumnSpecCreator(
                "Variable value", DoubleCell.TYPE).createSpec();
        DataColumnSpec varMin = new DataColumnSpecCreator(
                "Variable min ", DoubleCell.TYPE).createSpec();        
        DataColumnSpec varMax = new DataColumnSpecCreator(
                "Variable max", DoubleCell.TYPE).createSpec();        
        DataTableSpec varSpec = new DataTableSpec(varName, varValue, varMin, varMax);        
        
        return new DataTableSpec[]{ constantSpec, varSpec };        
    }
    
    private BufferedDataTable[] createOutputDataTables(final ExecutionContext exec) {
        ModelPlotterViewValue value = getViewValue();
        DataTableSpec[] outSpces = createOutputDataTableSpecs();
        
        BufferedDataContainer constBC = exec.createDataContainer(outSpces[0]);
        long i = 0;
        if (value.getConstants() != null) {
            for (Entry<String, Double> e : value.getConstants().entrySet()) {
                RowKey key = RowKey.createRowKey(i);
                constBC.addRowToTable(new DefaultRow(key, new StringCell(e
                        .getKey()), new DoubleCell(e.getValue())));
                i++;
            }
        }
        constBC.close();
        
        BufferedDataContainer varBC = exec.createDataContainer(outSpces[1]);
        i = 0;
        if (value.getVariables() != null) {
            for (Variable v : value.getVariables()) {
                RowKey key = RowKey.createRowKey(i);
                varBC.addRowToTable(new DefaultRow(key, new StringCell(v
                        .getName()), new DoubleCell(v.getDef()),
                        new DoubleCell(v.getMin()), new DoubleCell(v.getMax())));
                i++;
            }
        }
        varBC.close();
        
        return new BufferedDataTable[]{ constBC.getTable(), varBC.getTable() };
    }
    
    @Override
    protected void performReset() {
        m_executed = false;
    }

    @Override
    protected void useCurrentValueAsDefault() {
        // save value #getViewValue() as config for default values after restart 
    }

    @Override
    protected void saveSettingsTo(NodeSettingsWO settings) {
        m_config.saveSettings(settings);
    }

    @Override
    protected void validateSettings(NodeSettingsRO settings)
            throws InvalidSettingsException {
        new ModelPlotterViewConfig().loadSettings(settings);
    }

    @Override
    protected void loadValidatedSettingsFrom(NodeSettingsRO settings)
            throws InvalidSettingsException {
        m_config.loadSettings(settings);
    }
    
    private static List<KnimeTuple> getTuples(DataTable table) {
        boolean isTertiaryModel = SchemaFactory.createM12Schema().conforms(
                table);
        boolean containsData = SchemaFactory.createDataSchema().conforms(table);

        if (isTertiaryModel) {
            if (containsData) {
                return PmmUtilities.getTuples(table,
                        SchemaFactory.createM12DataSchema());
            } else {
                return PmmUtilities.getTuples(table,
                        SchemaFactory.createM12Schema());
            }
        } else {
            if (containsData) {
                return PmmUtilities.getTuples(table,
                        SchemaFactory.createM1DataSchema());
            } else {
                return PmmUtilities.getTuples(table,
                        SchemaFactory.createM1Schema());
            }
        }
    }

    @Override
    public void setHideInWizard(boolean hide) {
    }       
}