com.nedap.archie.rules.evaluation.evaluators.functions.Max Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of tools Show documentation

tools that operate on the archie reference models and archetype object model

The newest version!

package com.nedap.archie.rules.evaluation.evaluators.functions;

import com.nedap.archie.rules.PrimitiveType;
import com.nedap.archie.rules.evaluation.FunctionCallException;
import com.nedap.archie.rules.evaluation.FunctionImplementation;
import com.nedap.archie.rules.evaluation.Value;
import com.nedap.archie.rules.evaluation.ValueList;

import java.util.ArrayList;
import java.util.List;

import static com.nedap.archie.rules.evaluation.evaluators.FunctionUtil.*;

/**
 * Created by pieter.bos on 07/04/2017.
 */
public class Max implements FunctionImplementation {
    @Override
    public String getName() {
        return "max";
    }

    @Override
    public ValueList evaluate(List arguments) throws FunctionCallException {
        //if one of the values is null, return null.
        ValueList possiblyNullResult = checkAndHandleNull(arguments);
        if(possiblyNullResult != null) {
            possiblyNullResult.setType(PrimitiveType.Real);
            return possiblyNullResult;
        }
        //check that all valueList are equal length or 1 length
        int length = checkEqualLengthOrOne(arguments);
        if(length == -1) {
            throw new FunctionCallException("value lists of max operator not the same length");
        }
        ValueList result = new ValueList();
        result.setType(PrimitiveType.Real);
        for(int i = 0; i < length; i++) {
            Double max = null;
            List paths = new ArrayList<>();
            for(ValueList list: arguments) {
                Value value = list.get(i);
                if(!value.isNull() && ((max == null) || castToDouble(value) > max)) {
                    max = castToDouble(value);
                }
                paths.addAll(value.getPaths());
            }
            result.addValue(max, paths);
        }

        return result;
    }


}