/*******************************************************************************
 * JPUtil
 * Copyright (C) 2019  Javapony/OLEGSHA
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *******************************************************************************/
package ru.windcorp.jputil.chars.reader;

import java.io.IOException;
import java.io.Reader;

/**
 * @author Javapony
 *
 */
public class ReaderCharReader extends BufferedCharReader {
	
	private final Reader src;
	private IOException lastException = null;

	public ReaderCharReader(Reader src) {
		this.src = src;
	}

	/**
	 * @see ru.windcorp.jputil.chars.reader.BufferedCharReader#pullChar()
	 */
	@Override
	protected char pullChar() {
		try {
			return (char) src.read(); // Handles DONE correctly
		} catch (IOException e) {
			lastException = e;
			return DONE;
		}
	}
	
	/**
	 * @see ru.windcorp.jputil.chars.reader.BufferedCharReader#pullChars(char[], int, int)
	 */
	@Override
	protected int pullChars(char[] buffer, int offset, int length) {
		try {
			return src.read(buffer, offset, length);
		} catch (IOException e) {
			lastException = e;
			return 0;
		}
	}

	/**
	 * @return the exception
	 */
	@Override
	public IOException getLastException() {
		return lastException;
	}

}
