hex.genmodel.descriptor.ModelDescriptorBuilder Maven / Gradle / Ivy
package hex.genmodel.descriptor;
import hex.ModelCategory;
import hex.genmodel.GenModel;
import hex.genmodel.MojoModel;
import hex.genmodel.attributes.ModelAttributes;
import hex.genmodel.attributes.parameters.ColumnSpecifier;
import hex.genmodel.utils.ArrayUtils;
import java.io.Serializable;
import java.util.Arrays;
public class ModelDescriptorBuilder {
/**
* Builds an instance of {@link ModelDescriptor}, using information provided by the serialized model and
* which corresponding implementations of {@link hex.genmodel.ModelMojoReader} are able to provide.
*
* @param mojoModel A MojoModel to extract the model description from
* @param fullAlgorithmName A full name of the algorithm
* @param modelAttributes Optional model attributes
* @return A new instance of {@link ModelDescriptor}
*/
public static ModelDescriptor makeDescriptor(final MojoModel mojoModel, final String fullAlgorithmName,
final ModelAttributes modelAttributes) {
return new MojoModelDescriptor(mojoModel, fullAlgorithmName, modelAttributes);
}
public static ModelDescriptor makeDescriptor(final GenModel pojoModel) {
return new PojoModelDescriptor(pojoModel);
}
public static class MojoModelDescriptor implements ModelDescriptor, Serializable {
// Mandatory
private final String _h2oVersion;
private final hex.ModelCategory _category;
private final String _uuid;
private final boolean _supervised;
private final int _nfeatures;
private final int _nclasses;
private final boolean _balanceClasses;
private final double _defaultThreshold;
private final double[] _priorClassDistrib;
private final double[] _modelClassDistrib;
private final String _offsetColumn;
private final String _weightsColumn;
private final String[][] _domains;
private final String[][] _origDomains;
private final String[] _names;
private final String[] _origNames;
private final String _algoName;
private final String _fullAlgoName;
private MojoModelDescriptor(final MojoModel mojoModel, final String fullAlgorithmName,
final ModelAttributes modelAttributes) {
_category = mojoModel._category;
_uuid = mojoModel._uuid;
_supervised = mojoModel.isSupervised();
_nfeatures = mojoModel.nfeatures();
_nclasses = mojoModel._nclasses;
_balanceClasses = mojoModel._balanceClasses;
_defaultThreshold = mojoModel._defaultThreshold;
_priorClassDistrib = mojoModel._priorClassDistrib;
_modelClassDistrib = mojoModel._modelClassDistrib;
_h2oVersion = mojoModel._h2oVersion;
_offsetColumn = mojoModel._offsetColumn;
_domains = mojoModel._domains;
_origDomains = mojoModel.getOrigDomainValues();
_names = mojoModel._names;
_origNames = mojoModel.getOrigNames();
_algoName = mojoModel._algoName;
_fullAlgoName = fullAlgorithmName;
if (modelAttributes != null) {
ColumnSpecifier weightsColSpec = (ColumnSpecifier) modelAttributes.getParameterValueByName("weights_column");
_weightsColumn = weightsColSpec != null ? weightsColSpec.getColumnName() : null;
} else {
_weightsColumn = null;
}
}
@Override
public String[][] scoringDomains() {
return _domains;
}
@Override
public String projectVersion() {
return _h2oVersion;
}
@Override
public String algoName() {
return _algoName;
}
@Override
public String algoFullName() {
return _fullAlgoName;
}
@Override
public String offsetColumn() {
return _offsetColumn;
}
@Override
public String weightsColumn() {
return _weightsColumn;
}
@Override
public String foldColumn() {
return null;
}
@Override
public ModelCategory getModelCategory() {
return _category;
}
@Override
public boolean isSupervised() {
return _supervised;
}
@Override
public int nfeatures() {
return _nfeatures;
}
@Override
public String[] features() {
return Arrays.copyOf(columnNames(), nfeatures());
}
@Override
public int nclasses() {
return _nclasses;
}
@Override
public String[] columnNames() {
return _names;
}
@Override
public boolean balanceClasses() {
return _balanceClasses;
}
@Override
public double defaultThreshold() {
return _defaultThreshold;
}
@Override
public double[] priorClassDist() {
return _priorClassDistrib;
}
@Override
public double[] modelClassDist() {
return _modelClassDistrib;
}
@Override
public String uuid() {
return _uuid;
}
@Override
public String timestamp() {
return null;
}
@Override
public String[] getOrigNames() {
return _origNames;
}
@Override
public String[][] getOrigDomains() {
return _origDomains;
}
}
public static class PojoModelDescriptor implements ModelDescriptor, Serializable {
// Mandatory
private final hex.ModelCategory _category;
private final boolean _supervised;
private final int _nfeatures;
private final int _nclasses;
private final String _offsetColumn;
private final String[][] _domains;
private final String[][] _origDomains;
private final String[] _names;
private final String[] _origNames;
private PojoModelDescriptor(final GenModel mojoModel) {
_category = mojoModel.getModelCategory();
_supervised = mojoModel.isSupervised();
_nfeatures = mojoModel.nfeatures();
_nclasses = mojoModel.getNumResponseClasses();
_offsetColumn = mojoModel.getOffsetName();
_domains = mojoModel.getDomainValues();
_origDomains = mojoModel.getOrigDomainValues();
String[] names = mojoModel.getNames();
if (names.length == _domains.length - 1 && mojoModel.isSupervised() &&
!names[names.length - 1].equals(mojoModel._responseColumn)) {
names = ArrayUtils.append(names, mojoModel._responseColumn);
}
_names = names;
_origNames = mojoModel.getOrigNames();
}
@Override
public String[][] scoringDomains() {
return _domains;
}
@Override
public String projectVersion() {
return "unknown";
}
@Override
public String algoName() {
return "pojo";
}
@Override
public String algoFullName() {
return "POJO Scorer";
}
@Override
public String offsetColumn() {
return _offsetColumn;
}
@Override
public String weightsColumn() {
return null;
}
@Override
public String foldColumn() {
return null;
}
@Override
public ModelCategory getModelCategory() {
return _category;
}
@Override
public boolean isSupervised() {
return _supervised;
}
@Override
public int nfeatures() {
return _nfeatures;
}
@Override
public String[] features() {
return Arrays.copyOf(columnNames(), nfeatures());
}
@Override
public int nclasses() {
return _nclasses;
}
@Override
public String[] columnNames() {
return _names;
}
@Override
public boolean balanceClasses() {
return false;
}
@Override
public double defaultThreshold() {
return Double.NaN;
}
@Override
public double[] priorClassDist() {
return null;
}
@Override
public double[] modelClassDist() {
return null;
}
@Override
public String uuid() {
return null;
}
@Override
public String timestamp() {
return null;
}
@Override
public String[] getOrigNames() {
return _origNames;
}
@Override
public String[][] getOrigDomains() {
return _origDomains;
}
}
}