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org.pmml4s.xml.TransformationsBuilder.scala Maven / Gradle / Ivy
/*
* Copyright (c) 2017-2023 AutoDeployAI
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.pmml4s.xml
import org.pmml4s.UnsupportedException
import org.pmml4s.common._
import org.pmml4s.metadata._
import org.pmml4s.transformations._
import org.pmml4s.util.Utils
import scala.collection.mutable
import org.apache.commons.text.StringEscapeUtils
import org.pmml4s.data.DataVal
/**
* Builder of transformations
*/
trait TransformationsBuilder extends CommonBuilder
with FieldScope
with HasFieldScope
with FunctionProvider {
// This collection is only used when parsing derived fields within TransformationDictionary
protected val provider: MutableFunctionProvider = new MutableFunctionProvider
protected val derivedFieldScope: MutableFieldScope[DerivedField] = new MutableFieldScope
override def field(name: String): Field = {
val fld = super.field(name)
if (!fld.referenced) {
fld.referenced = true
}
fld
}
override def getField(name: String): Option[Field] = derivedFieldScope.getField(name)
override def scope: FieldScope = this
override def getFunction(name: String): Option[Function] = {
BuiltInFunctions.getFunction(name).orElse(provider.getFunction(name))
}
/** Parses the transformation dictionary. */
def makeTransformationDictionary(reader: XMLEventReader): TransformationDictionary = {
val defineFunctions = mutable.ArrayBuilder.make[DefineFunction]
val derivedFields = mutable.ArrayBuilder.make[DerivedField]
traverseElems(reader, ElemTags.TRANSFORMATION_DICTIONARY, {
case EvElemStart(_, ElemTags.DEFINE_FUNCTION, attrs, _) => {
defineFunctions += (provider += makeDefineFunction(reader, attrs))
}
case EvElemStart(_, ElemTags.DERIVED_FIELD, attrs, _) => {
derivedFields += (derivedFieldScope += makeDerivedField(reader, attrs))
}
})
new TransformationDictionary(derivedFields.result(), defineFunctions.result())
}
/** Parses the local transformations */
def makeLocalTransformations(reader: XMLEventReader): LocalTransformations = {
val derivedFields = makeElems(reader, ElemTags.LOCAL_TRANSFORMATIONS, ElemTags.DERIVED_FIELD, new ElemBuilder[DerivedField] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): DerivedField = {
derivedFieldScope += makeDerivedField(reader, attrs)
}
})
new LocalTransformations(derivedFields)
}
def makeDefineFunction(reader: XMLEventReader, attrs: XmlAttrs): DefineFunction = {
val name = attrs(AttrTags.NAME)
val opType = attrs.get(AttrTags.OPTYPE).map(OpType.withName(_)).getOrElse(OpType.typeless)
val dataType = attrs.get(AttrTags.DATA_TYPE).map(DataType.withName(_)).getOrElse(UnresolvedDataType)
val parameterFields = mutable.ArrayBuilder.make[ParameterField]
var expr: Expression = null
traverseElems(reader, ElemTags.DEFINE_FUNCTION, {
case EvElemStart(_, ElemTags.PARAMETER_FIELD, attrs, _) => parameterFields += makeElem(reader, attrs,
new ElemBuilder[ParameterField] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): ParameterField = {
val name = attrs(AttrTags.NAME)
val opType = attrs.get(AttrTags.OPTYPE).map(OpType.withName(_)).getOrElse(OpType.typeless)
val dataType = attrs.get(AttrTags.DATA_TYPE).map(DataType.withName(_)).getOrElse(UnresolvedDataType)
val displayName = attrs.get(AttrTags.DISPLAY_NAME)
new ParameterField(name, opType, dataType, displayName)
}
})
case event: EvElemStart if Expression.contains(event.label) => {
expr = makeExpression(reader, event, new FieldScope {
private lazy val nameToField = parameterFields.result().map(x => (x.name, x)).toMap
override def getField(name: String): Option[Field] = nameToField.get(name)
})
}
})
new DefineFunction(name, parameterFields.result(), expr, opType, dataType)
}
def makeDerivedField(reader: XMLEventReader, attrs: XmlAttrs): DerivedField = {
val name = attrs.getString(AttrTags.NAME, "")
val displayName = attrs.get(AttrTags.DISPLAY_NAME)
val opType = OpType.withName(attrs(AttrTags.OPTYPE))
val dataType = attrs.get(AttrTags.DATA_TYPE).map { x => DataType.withName(x) } getOrElse (UnresolvedDataType)
val valuesBuilder = mutable.ArrayBuilder.make[Value]
var expression: Expression = null
traverseElems(reader, ElemTags.DERIVED_FIELD, {
case event: EvElemStart if Expression.contains(event.label) => expression = makeExpression(reader, event, this)
case EvElemStart(_, ElemTags.VALUE, attrs, _) => valuesBuilder += makeValue(reader, attrs)
case _ =>
})
var values = valuesBuilder.result()
if (values.isEmpty && expression.categories.nonEmpty) {
values ++= expression.categories.map(x => new Value(x.toString))
}
new DerivedField(name, displayName, dataType, opType, values, expression)
}
def makeExpression(reader: XMLEventReader, event: EvElemStart, scope: FieldScope): Expression = makeElem(reader, event, new GroupElemBuilder[Expression] {
override def build(reader: XMLEventReader, event: EvElemStart): Expression = event match {
case EvElemStart(_, ElemTags.CONSTANT, attrs, _) => makeElem(reader, attrs, new ElemBuilder[Constant] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): Constant = {
val dataType = attrs.get(AttrTags.DATA_TYPE).map(DataType.withName(_))
val missing = attrs.getBoolean(AttrTags.MISSING, false)
var content: String = null
traverseElems(reader, ElemTags.CONSTANT, {
case EvText(text) => content = text
}, true)
val value: DataVal = if (dataType.isDefined) {
if (content != null && dataType.get == RealType) {
content.toLowerCase match {
case "nan" => DataVal.NaN
case "inf" => DataVal.PositiveInfinity
case "-inf" => DataVal.NegativeInfinity
case _ => Utils.toDataVal(content, dataType.get)
}
} else Utils.toDataVal(content, dataType.get)
} else DataVal.from(content)
new Constant(value, dataType, missing)
}
})
case EvElemStart(_, ElemTags.FIELD_REF, attrs, _) => makeFieldRef(reader, attrs, scope)
case EvElemStart(_, ElemTags.NORM_CONTINUOUS, attrs, _) => makeElem(reader, attrs, new ElemBuilder[NormContinuous] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): NormContinuous = {
val fld = scope.field(attrs(AttrTags.FIELD))
val mapMissingTo = attrs.getDouble(AttrTags.MAP_MISSING_TO)
val outliers = attrs.get(AttrTags.OUTLIERS).map(OutlierTreatmentMethod.withName(_)).getOrElse(OutlierTreatmentMethod.asIs)
val linearNorms = makeElems(reader, ElemTags.NORM_CONTINUOUS, ElemTags.LINEAR_NORM, new ElemBuilder[LinearNorm] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): LinearNorm = {
val orig = attrs.double(AttrTags.ORIG)
val norm = attrs.double(AttrTags.NORM)
new LinearNorm(orig, norm)
}
})
new NormContinuous(linearNorms, fld, mapMissingTo, outliers)
}
})
case EvElemStart(_, ElemTags.NORM_DISCRETE, attrs, _) => makeElem(reader, attrs, new ElemBuilder[NormDiscrete] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): NormDiscrete = {
val fld = scope.field(attrs(AttrTags.FIELD))
val value = fld.toVal(attrs(AttrTags.VALUE))
val mapMissingTo = attrs.getDouble(AttrTags.MAP_MISSING_TO)
new NormDiscrete(fld, value, mapMissingTo)
}
})
case EvElemStart(_, ElemTags.DISCRETIZE, attrs, _) => makeElem(reader, attrs, new ElemBuilder[Discretize] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): Discretize = {
val fld = scope.field(attrs(AttrTags.FIELD))
val dataType = attrs.get(AttrTags.DATA_TYPE).map(DataType.withName(_))
val mapMissingTo = attrs.get(AttrTags.MAP_MISSING_TO).flatMap(x => dataType.map(_.toVal(x)))
val defaultValue = attrs.get(AttrTags.DEFAULT_VALUE).flatMap(x => dataType.map(_.toVal(x)))
val discretizeBins = makeElems(reader, ElemTags.DISCRETIZE, ElemTags.DISCRETIZE_BIN, new ElemBuilder[DiscretizeBin] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): DiscretizeBin = {
val binValue = DataVal.from(attrs(AttrTags.BIN_VALUE))
val interval = makeElem(reader, ElemTags.DISCRETIZE_BIN, ElemTags.INTERVAL, new ElemBuilder[Interval] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): Interval = makeInterval(reader, attrs)
})
new DiscretizeBin(interval.get, binValue)
}
})
new Discretize(discretizeBins, fld, mapMissingTo, defaultValue, dataType)
}
})
case EvElemStart(_, ElemTags.MAP_VALUES, attrs, _) => makeElem(reader, attrs, new ElemBuilder[MapValues] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): MapValues = {
val outputColumn = attrs(AttrTags.OUTPUT_COLUMN)
val dataType = attrs.get(AttrTags.DATA_TYPE).map(DataType.withName)
val mapMissingTo = attrs.get(AttrTags.MAP_MISSING_TO).map(DataVal.from)
val defaultValue = attrs.get(AttrTags.DEFAULT_VALUE).map(DataVal.from)
val fieldColumnPairs = mutable.ArrayBuilder.make[FieldColumnPair]
var table: Table = null
val dataTypes = mutable.Map.empty[String, DataType]
dataType.foreach(x => dataTypes += outputColumn -> x)
traverseElems(reader, ElemTags.MAP_VALUES, {
case EvElemStart(_, ElemTags.FIELD_COLUMN_PAIR, attrs, _) => fieldColumnPairs +=
makeElem(reader, attrs, new ElemBuilder[FieldColumnPair] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): FieldColumnPair = {
val f = scope.field(attrs(AttrTags.FIELD))
val column = attrs(AttrTags.COLUMN)
dataTypes += column -> f.dataType
new FieldColumnPair(f, column)
}
})
case event: EvElemStart if (Table.contains(event.label)) => table = makeTable(reader, event, dataTypes.toMap)
})
new MapValues(fieldColumnPairs.result(), table, outputColumn, mapMissingTo, defaultValue, dataType)
}
})
case EvElemStart(_, ElemTags.TEXT_INDEX, attrs, _) => makeElem(reader, attrs, new ElemBuilder[TextIndex] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): TextIndex = {
val textField = scope.field(attrs(AttrTags.TEXT_FIELD))
val localTermWeights = attrs.get(AttrTags.LOCAL_TERM_WEIGHTS).map(LocalTermWeights.withName(_)).
getOrElse(LocalTermWeights.termFrequency)
val isCaseSensitive = attrs.getBoolean(AttrTags.IS_CASE_SENSITIVE, false)
val maxLevenshteinDistance = attrs.getInt(AttrTags.MAX_LEVENSHTEIN_DISTANCE, 0)
val countHits = attrs.get(AttrTags.COUNT_HITS).map(CountHits.withName(_)).
getOrElse(CountHits.allHits)
val wordSeparatorCharacterRE = attrs.getString(AttrTags.WORD_SEPARATOR_CHARACTER_RE, "\\s+")
val tokenize = attrs.getBoolean(AttrTags.TOKENIZE, true)
val textIndexNormalizations = mutable.ArrayBuilder.make[TextIndexNormalization]
var expression: Expression = null
traverseElems(reader, ElemTags.TEXT_INDEX, {
case EvElemStart(_, ElemTags.TEXT_INDEX_NORMALIZATION, attrs, _) => textIndexNormalizations +=
makeElem(reader, attrs, new ElemBuilder[TextIndexNormalization] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): TextIndexNormalization = {
val inField = attrs.getString(AttrTags.IN_FIELD, "string")
val outField = attrs.getString(AttrTags.OUT_FIELD, "stem")
val regexField = attrs.getString(AttrTags.REGEX_FIELD, "regex")
val recursive = attrs.getBoolean(AttrTags.RECURSIVE, false)
val isCaseSensitive = attrs.getBoolean(AttrTags.IS_CASE_SENSITIVE)
val maxLevenshteinDistance = attrs.getInt(AttrTags.MAX_LEVENSHTEIN_DISTANCE)
val wordSeparatorCharacterRE = attrs.get(AttrTags.WORD_SEPARATOR_CHARACTER_RE)
val tokenize = attrs.getBoolean(AttrTags.TOKENIZE)
var table: Table = null
traverseElems(reader, ElemTags.TEXT_INDEX_NORMALIZATION, {
case event: EvElemStart if (Table.contains(event.label)) => table = makeTable(reader, event)
case _ =>
})
new TextIndexNormalization(table, isCaseSensitive, maxLevenshteinDistance, wordSeparatorCharacterRE,
tokenize, inField, outField, regexField, recursive)
}
})
case event: EvElemStart if Expression.contains(event.label) => expression = makeExpression(reader, event, scope)
case _ =>
})
new TextIndex(textField, expression, textIndexNormalizations.result(), localTermWeights, isCaseSensitive,
maxLevenshteinDistance, countHits, wordSeparatorCharacterRE, tokenize)
}
})
case EvElemStart(_, ElemTags.APPLY, attrs, _) => makeElem(reader, attrs, new ElemBuilder[Apply] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): Apply = {
val func = function(attrs(AttrTags.FUNCTION))
val mapMissingTo = attrs.get(AttrTags.MAP_MISSING_TO).map(DataVal.from)
val defaultValue = attrs.get(AttrTags.DEFAULT_VALUE).map(DataVal.from)
val invalidValueTreatment = attrs.get(AttrTags.INVALID_VALUE_TREATMENT).map(InvalidValueTreatment.withName(_)).
getOrElse(InvalidValueTreatment.returnInvalid)
val children = mutable.ArrayBuilder.make[Expression]
traverseElems(reader, ElemTags.APPLY, {
case event: EvElemStart if Expression.contains(event.label) => children += makeExpression(reader, event, scope)
case _ =>
})
new Apply(func, children.result(), mapMissingTo, defaultValue, invalidValueTreatment)
}
})
case EvElemStart(_, ElemTags.AGGREGATE, attrs, _) => throw new UnsupportedException(ElemTags.AGGREGATE)
case EvElemStart(_, ElemTags.LAG, attrs, _) => throw new UnsupportedException(ElemTags.LAG)
case _ => ???
}
})
def makeFieldRef(reader: XMLEventReader, attrs: XmlAttrs, scope: FieldScope): FieldRef = makeElem(reader, attrs, new ElemBuilder[FieldRef] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): FieldRef = {
val fld = scope.field(attrs(AttrTags.FIELD))
val mapMissingTo = attrs.get(AttrTags.MAP_MISSING_TO).map(fld.toVal)
new FieldRef(fld, mapMissingTo)
}
})
def makeCategoricalPredictor(reader: XMLEventReader, attrs: XmlAttrs): CategoricalPredictor = makeElem(reader, attrs, new ElemBuilder[CategoricalPredictor] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): CategoricalPredictor = {
val name = attrs(AttrTags.NAME)
val fld = field(name)
val value = verifyValue(attrs(AttrTags.VALUE), field(name))
val coefficient = attrs.double(AttrTags.COEFFICIENT)
new CategoricalPredictor(fld, coefficient, value)
}
})
def makeTable(reader: XMLEventReader, event: EvElemStart, dataTypes: Map[String, DataType] = Map.empty): Table = makeElem(reader, event, new GroupElemBuilder[Table] {
override def build(reader: XMLEventReader, event: EvElemStart): Table = event match {
case EvElemStart(_, ElemTags.TABLE_LOCATOR, attrs, _) => makeElem(reader, attrs, new ElemBuilder[TableLocator] {
// TODO: table location
override def build(reader: XMLEventReader, attrs: XmlAttrs): TableLocator = {
throw new UnsupportedException(ElemTags.TABLE_LOCATOR)
}
})
case EvElemStart(_, ElemTags.INLINE_TABLE, attrs, _) => makeElem(reader, attrs, new ElemBuilder[InlineTable] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): InlineTable = {
val rows = makeElems(reader, ElemTags.INLINE_TABLE, ElemTags.ROW, new ElemBuilder[Row] {
override def build(reader: XMLEventReader, attrs: XmlAttrs): Row = {
val elements = new mutable.HashMap[String, DataVal]()
var key: String = null
var value: String = ""
traverseElems(reader, ElemTags.ROW, {
case EvElemStart(pre, label, _, _) => {
// Handel some elements like ,
key = if (pre != null && !pre.isEmpty) s"${pre}:${label}" else label
value = ""
}
case EvElemEnd(_, _) => if (key != null) {
elements += (key -> dataTypes.getOrElse(key, StringType).toVal(value))
key = null
value = ""
}
case EvEntityRef(text) => if (key != null) {
value = value + StringEscapeUtils.unescapeXml(text)
}
case EvText(text) => if (key != null) value = value + text
}, true, true, true)
new Row(elements.toMap)
}
})
new InlineTable(rows)
}
})
case _ => ??????
}
})
}
