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Java Marine API is an NMEA 0183 library for Java (http://ktuukkan.github.io/marine-api/).

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/*
 * DefaultDataReader.java
 * Copyright (C) 2010-2014 Kimmo Tuukkanen
 * 
 * This file is part of Java Marine API.
 * 
 * 
 * Java Marine API is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 * 
 * Java Marine API 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 Lesser General Public License
 * for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with Java Marine API. If not, see .
 */
package net.sf.marineapi.nmea.io;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

/**
 * The default data reader implementation using InputStream as data source.
 * 
 * @author Kimmo Tuukkanen
 */
class DefaultDataReader extends AbstractDataReader {

	private final BufferedReader input;

	/**
	 * Creates a new instance of DefaultDataReader.
	 * 
	 * @param source InputStream to be used as data source.
	 * @param parent SentenceReader dispatching events for this reader.
	 */
	public DefaultDataReader(InputStream source, SentenceReader parent) {
		super(parent);
		InputStreamReader isr = new InputStreamReader(source);
		this.input = new BufferedReader(isr);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see net.sf.marineapi.nmea.io.AbstractDataReader#read()
	 */
	@Override
	public String read() {
		String data = null;
		try {
			if(input.ready()) {
				data = input.readLine();
			}
		} catch (Exception e) {
			getParent().handleException("InputStream read failed", e);
		}
		return data;
	}
}