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JPMML class model evaluator

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/*
 * Copyright (c) 2017 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 jakarta.xml.bind.annotation.XmlRootElement;
import org.dmg.pmml.Expression;
import org.dmg.pmml.Version;
import org.dmg.pmml.Visitor;
import org.dmg.pmml.VisitorAction;
import org.jpmml.model.annotations.Added;

@XmlRootElement (
	name = "X-JavaExpression",
	namespace = "http://jpmml.org/jpmml-evaluator/"
)
@Added(Version.XPMML)
abstract
public class JavaExpression extends Expression {

	abstract
	public FieldValue evaluate(EvaluationContext context);

	@Override
	public VisitorAction accept(Visitor visitor){
		VisitorAction status = visitor.visit(this);

		if(status == VisitorAction.CONTINUE){
			visitor.pushParent(this);
			visitor.popParent();
		} // End if

		if(status == VisitorAction.TERMINATE){
			return VisitorAction.TERMINATE;
		}

		return VisitorAction.CONTINUE;
	}
}