org.jpmml.translator.tree.NodeScope Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of pmml-transpiler Show documentation

JPMML class model transpiler

There is a newer version: 1.3.8

/*
 * Copyright (c) 2021 Villu Ruusmann
 *
 * This file is part of JPMML-Transpiler
 *
 * JPMML-Transpiler 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-Transpiler 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-Transpiler.  If not, see .
 */
package org.jpmml.translator.tree;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import com.sun.codemodel.JBlock;
import com.sun.codemodel.JVar;
import org.jpmml.translator.JBlockUtil;
import org.jpmml.translator.JIfStatement;
import org.jpmml.translator.Scope;

public class NodeScope extends Scope {

	public NodeScope(JIfStatement ifStatement){
		super(ifStatement._then());
	}

	public int reInit(){
		JBlock block = getBlock();

		List objects = block.getContents();

		cleanVariableInfo();

		for(Object object : objects){

			if(object instanceof JVar){
				JVar variable = (JVar)object;

				putVariable(variable);
			}
		}

		return objects.size();
	}

	Object chainContent(){
		return chainContent(0);
	}

	Object chainContent(int offset){
		JBlock block = getBlock();

		List objects = block.getContents();

		List passiveObjects = Collections.emptyList();
		List activeObjects = objects;

		if(offset > 0){
			passiveObjects = new ArrayList<>(objects.subList(0, offset));
			activeObjects = new ArrayList<>(objects.subList(offset, activeObjects.size()));
		} // End if

		if(activeObjects.size() == 0){
			throw new IllegalStateException();
		} else

		if(activeObjects.size() == 1){
			return activeObjects.get(0);
		}

		Object result = activeObjects.get(activeObjects.size() - 1);

		List chainedActiveObjects = chainContent(activeObjects);

		JBlockUtil.clear(block);

		JBlockUtil.insertAll(block, passiveObjects);
		JBlockUtil.insertAll(block, chainedActiveObjects);

		return result;
	}

	static
	List