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JPMML class model evaluator
/*
* Copyright (c) 2013 Villu Ruusmann
*
* This file is part of JPMML-Evaluator
*
* JPMML-Evaluator is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* JPMML-Evaluator 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with JPMML-Evaluator. If not, see
* A field value representation that meets the requirements of PMML type system.
*
*
* Type information has two components to it:
*
* - {@link #getOpType() Operational type}. Determines supported type equality and type comparison operations.
* - {@link #getDataType() Data type}. Determines supported type conversions.
*
*
*
* A field value is created after a {@link Field field}.
* It may be later refined by {@link Expression transformations} and {@link Function functions}.
*
*
* @see FieldValueUtil
*/
abstract
public class FieldValue implements TypeInfo, Serializable {
private DataType dataType = null;
private Object value = null;
FieldValue(){
}
FieldValue(DataType dataType, Object value){
setDataType(dataType);
setValue(value);
}
abstract
public boolean isValid();
abstract
public int compareToValue(Object value);
abstract
public int compareToValue(FieldValue value);
public FieldValue cast(HasType hasType){
DataType dataType = hasType.getDataType();
OpType opType = hasType.getOpType();
boolean equal = true;
if(dataType == null){
dataType = getDataType();
} else
{
equal &= (getDataType() == dataType);
} // End if
if(opType == null){
opType = getOpType();
} else
{
equal &= (getOpType() == opType);
} // End if
if(equal){
return this;
}
return FieldValue.create(opType, dataType, getValue());
}
public FieldValue cast(TypeInfo typeInfo){
DataType dataType = typeInfo.getDataType();
OpType opType = typeInfo.getOpType();
if((getDataType() == dataType) && (getOpType() == opType)){
return this;
}
return FieldValue.create(typeInfo, getValue());
}
/**
*
* Calculates the order between this value and the reference value.
*
*/
public int compareTo(HasValue hasValue){
return compareToValue(hasValue.requireValue());
}
/**
*
* Checks if this value is equal to the reference value.
*
*/
public boolean equals(HasValue hasValue){
return equalsValue(hasValue.requireValue());
}
/**
*
* Checks if this value is contained in the set of reference values.
*
*/
public boolean isIn(HasValueSet hasValueSet){
Array array = hasValueSet.requireArray();
if(array instanceof SetHolder){
SetHolder setHolder = (SetHolder)array;
return setHolder.contains(getDataType(), getValue());
}
List values = ArrayUtil.getContent(array);
for(int i = 0, max = values.size(); i < max; i++){
Object value = values.get(i);
if(equalsValue(value)){
return true;
}
}
return false;
}
public boolean isIn(Collection values){
for(FieldValue value : values){
if(FieldValueUtil.isMissing(value)){
continue;
} // End if
if(equalsValue(value)){
return true;
}
}
return false;
}
public boolean equalsValue(Object value){
value = TypeUtil.parseOrCast(getDataType(), value);
return (getValue()).equals(value);
}
public boolean equalsValue(FieldValue value){
return equalsValue(value.getValue());
}
public Collection asCollection(){
return TypeUtil.cast(Collection.class, getValue());
}
public String asString(){
return (String)getValue(DataType.STRING);
}
public Number asNumber(){
Object value = getValue();
if(value instanceof Number){
return (Number)value;
}
return (Number)getValue(DataType.DOUBLE);
}
public Integer asInteger(){
return (Integer)getValue(DataType.INTEGER);
}
public Float asFloat(){
Number number = asNumber();
return number.floatValue();
}
/**
* Getting the value of a field as {@link Double}:
*
* FieldValue value = ...;
* Double result = value.asDouble();
*
*
* Getting the value of a field as double:
*
* FieldValue value = ...;
* double result = (value.asNumber()).doubleValue();
*
*
* @see #asNumber()
*/
public Double asDouble(){
Number number = asNumber();
return number.doubleValue();
}
public Boolean asBoolean(){
return (Boolean)getValue(DataType.BOOLEAN);
}
public Date asDate(){
return (Date)getValue(DataType.DATE);
}
public Time asTime(){
return (Time)getValue(DataType.TIME);
}
public DateTime asDateTime(){
return (DateTime)getValue(DataType.DATE_TIME);
}
public Instant asInstant(){
DataType dataType = getDataType();
switch(dataType){
case DATE:
case TIME:
case DATE_TIME:
return TypeUtil.cast(Instant.class, getValue());
default:
break;
}
try {
return asDateTime();
} catch(TypeCheckException tceDateTime){
try {
return asDate();
} catch(TypeCheckException tceDate){
// Ignored
} // End try
try {
return asTime();
} catch(TypeCheckException tceTime){
// Ignored
}
throw tceDateTime;
}
}
Object getValue(DataType dataType){
if(getDataType() == dataType){
return getValue();
}
return TypeUtil.parseOrCast(dataType, getValue());
}
@Override
public int hashCode(){
return (31 * (getOpType().hashCode() ^ getDataType().hashCode())) + getValue().hashCode();
}
@Override
public boolean equals(Object object){
if(object instanceof FieldValue){
FieldValue that = (FieldValue)object;
return (this.getOpType() == that.getOpType()) && (this.getDataType() == that.getDataType()) && (this.getValue()).equals(that.getValue());
}
return false;
}
@Override
public String toString(){
ToStringHelper helper = toStringHelper();
return helper.toString();
}
protected ToStringHelper toStringHelper(){
ToStringHelper helper = new ToStringHelper(this)
.add("opType", getOpType())
.add("dataType", getDataType())
.add("value", getValue());
return helper;
}
@Override
public DataType getDataType(){
return this.dataType;
}
private void setDataType(DataType dataType){
this.dataType = Objects.requireNonNull(dataType);
}
public Object getValue(){
return this.value;
}
private void setValue(Object value){
this.value = Objects.requireNonNull(value);
}
static
public FieldValue create(OpType opType, DataType dataType, Object value){
if(opType == null || dataType == null){
throw new IllegalArgumentException();
}
switch(opType){
case CONTINUOUS:
return ContinuousValue.create(dataType, value);
case CATEGORICAL:
return CategoricalValue.create(dataType, value);
case ORDINAL:
return OrdinalValue.create(dataType, (List)null, value);
default:
throw new IllegalArgumentException();
}
}
static
public FieldValue create(TypeInfo typeInfo, Object value){
if(typeInfo == null){
throw new IllegalArgumentException();
}
DataType dataType = typeInfo.getDataType();
OpType opType = typeInfo.getOpType();
switch(opType){
case CONTINUOUS:
return ContinuousValue.create(dataType, value);
case CATEGORICAL:
return CategoricalValue.create(dataType, value);
case ORDINAL:
List ordering = typeInfo.getOrdering();
return OrdinalValue.create(dataType, ordering, value);
default:
throw new IllegalArgumentException();
}
}
static final Integer STATUS_UNKNOWN_VALID = Integer.MAX_VALUE;
static final Integer STATUS_MISSING = 0;
static final Integer STATUS_UNKNOWN_INVALID = Integer.MIN_VALUE;
}