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JPMML class model evaluator
/*
* Copyright (c) 2018 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 .
*/
package org.jpmml.evaluator;
import java.util.List;
import com.google.common.base.Function;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import org.dmg.pmml.Array;
public class ArrayUtil {
private ArrayUtil(){
}
static
public int getSize(Array array){
Integer n = array.getN();
if(n != null){
return n;
}
List content = getContent(array);
return content.size();
}
static
public List getContent(Array array){
return CacheUtil.getValue(array, ArrayUtil.contentCache);
}
static
public List asNumberList(Array array){
List content = getContent(array);
Array.Type type = array.getType();
if(type == null){
throw new MissingAttributeException(array, PMMLAttributes.ARRAY_TYPE);
}
switch(type){
case INT:
case REAL:
return (List)content;
case STRING:
throw new InvalidElementException(array);
default:
throw new UnsupportedAttributeException(array, type);
}
}
static
public List parse(Array array){
Array.Type type = array.getType();
if(type == null){
throw new MissingAttributeException(array, PMMLAttributes.ARRAY_TYPE);
}
String value = array.getValue();
List tokens;
switch(type){
case INT:
case REAL:
tokens = org.jpmml.model.ArrayUtil.parse(value, false);
break;
case STRING:
tokens = org.jpmml.model.ArrayUtil.parse(value, true);
break;
default:
throw new UnsupportedAttributeException(array, type);
}
Integer n = array.getN();
if(n != null && n != tokens.size()){
throw new InvalidElementException(array);
}
switch(type){
case INT:
return Lists.transform(tokens, INT_PARSER);
case REAL:
return Lists.transform(tokens, REAL_PARSER);
case STRING:
return Lists.transform(tokens, STRING_PARSER);
default:
throw new UnsupportedAttributeException(array, type);
}
}
private static final Function INT_PARSER = new Function(){
@Override
public Integer apply(String string){
return Numbers.INTEGER_INTERNER.intern(Integer.parseInt(string));
}
};
private static final Function REAL_PARSER = new Function(){
@Override
public Double apply(String string){
return Numbers.DOUBLE_INTERNER.intern(Double.parseDouble(string));
}
};
private static final Function STRING_PARSER = new Function(){
@Override
public String apply(String string){
return Strings.INTERNER.intern(string);
}
};
private static final LoadingCache> contentCache = CacheUtil.buildLoadingCache(new CacheLoader>(){
@Override
public List load(Array array){
return ImmutableList.copyOf(parse(array));
}
});
}