CommonLineReader.java
/* Copyright 2002-2022 CS GROUP
* Licensed to CS GROUP (CS) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* CS licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.orekit.models.earth.atmosphere.data;
import java.io.BufferedReader;
import java.io.IOException;
/**
* Helper class to parse line data.
* @since 11.2
*/
class CommonLineReader {
/** The input stream. */
private final BufferedReader in;
/** The last line read from the file. */
private String line;
/** The number of the last line read from the file. */
private long lineNo;
/**
* Create a line reader.
*
* @param in the input data stream.
*/
CommonLineReader(final BufferedReader in) {
this.in = in;
this.line = null;
this.lineNo = 0;
}
/**
* Read a line from the input data stream.
*
* @return the next line without the line termination character, or {@code null}
* if the end of the stream has been reached.
* @throws IOException if an I/O error occurs.
* @see BufferedReader#readLine()
*/
public String readLine() throws IOException {
line = in.readLine();
lineNo++;
return line;
}
/**
* Check if the last line read is empty.
*
* @return whether a line is empty or not
*/
public boolean isEmptyLine() {
return line.length() == 0;
}
/**
* Get the last line read from the stream.
*
* @return May be {@code null} if no lines have been read or the end of stream
* has been reached.
*/
public String getLine() {
return line;
}
/**
* Get the line number of the last line read from the file.
*
* @return the line number.
*/
public long getLineNumber() {
return lineNo;
}
}