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    • org.jpmml.evaluator.InlineTableUtil Maven / Gradle / Ivy

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    /*
 * 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 .
 */
package org.jpmml.evaluator;

import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Set;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.common.collect.HashBasedTable;
import com.google.common.collect.Table;
import com.google.common.collect.Tables;
import org.dmg.pmml.InlineTable;
import org.dmg.pmml.Row;
import org.w3c.dom.Element;

public class InlineTableUtil {

	private InlineTableUtil(){
	}

	static
	public Table getContent(InlineTable inlineTable){
		return CacheUtil.getValue(inlineTable, InlineTableUtil.contentCache);
	}

	static
	public Table parse(InlineTable inlineTable){
		Table result = HashBasedTable.create();

		Integer rowKey = 1;

		List rows = inlineTable.getRows();
		for(Row row : rows){
			List cells = row.getContent();

			for(Object cell : cells){

				if(cell instanceof Element){
					Element element = (Element)cell;

					result.put(rowKey, element.getTagName(), element.getTextContent());
				}
			}

			rowKey += 1;
		}

		return result;
	}

	static
	public Map match(Table table, Map values){
		Set rowKeys = table.rowKeySet();

		rows:
		for(Integer rowKey : rowKeys){
			Map row = table.row(rowKey);

			// A table row contains a certain number of input columns, plus an output column
			if(values.size() < (row.size() - 1)){
				continue rows;
			}

			Collection> entries = values.entrySet();
			for(Map.Entry entry : entries){
				String key = entry.getKey();
				FieldValue value = entry.getValue();

				String rowValue = row.get(key);
				if(rowValue == null){
					continue rows;
				}

				boolean equals = value.equalsString(rowValue);
				if(!equals){
					continue rows;
				}
			}

			return row;
		}

		return null;
	}

	private static final LoadingCache> contentCache = CacheBuilder.newBuilder()
		.weakKeys()
		.build(new CacheLoader>(){

			@Override
			public Table load(InlineTable inlineTable){
				return Tables.unmodifiableTable(parse(inlineTable));
			}
		});
}    
    
    
    

    




    
    
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