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JPMML Python to PMML converter

There is a newer version: 1.2.8

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

import java.util.ArrayDeque;
import java.util.Deque;

public class PushbackPythonParserTokenManager extends PythonParserTokenManager {

	private final Deque tokens = new ArrayDeque<>();


	public PushbackPythonParserTokenManager(SimpleCharStream simpleCharStream){
		super(simpleCharStream);
	}

	@Override
	public Token getNextToken(){

		if(!this.tokens.isEmpty()){
			return this.tokens.pop();
		}

		return super.getNextToken();
	}

	@Override
	public void SwitchTo(int lexState){
		throw new UnsupportedOperationException();
	}

	public void pushBack(Token token){
		this.tokens.push(token);
	}
}