/* Copyright c 2005-2012.
* Licensed under GNU LESSER General Public License, Version 3.
* http://www.gnu.org/licenses
*/
package org.beangle.util.csv;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
import org.beangle.util.csv.internal.CsvParser;
public class CsvReader {
private boolean hasNext = true;
private boolean linesSkiped;
private int skipLines;
private BufferedReader br;
private CsvParser parser;
public CsvReader(Reader reader) {
this(reader, new CsvFormat.Builder().build());
}
public CsvReader(Reader reader, CsvFormat format) {
this.br = new BufferedReader(reader);
this.parser = new CsvParser(format);
this.skipLines = 0;
}
/**
* Reads the next line from the file.
*
* @return the next line from the file without trailing newline
* @throws IOException
* if bad things happen during the read
*/
private String getNextLine() {
try {
if (!this.linesSkiped) {
for (int i = 0; i < skipLines; i++) {
br.readLine();
}
this.linesSkiped = true;
}
String nextLine = br.readLine();
if (nextLine == null) {
hasNext = false;
}
return hasNext ? nextLine : null;
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public String[] readNext() {
String[] result = null;
do {
String nextLine = getNextLine();
if (!hasNext) { return result; // should throw if still pending?
}
String[] r = parser.parseLineMulti(nextLine);
if (r.length > 0) {
if (result == null) {
result = r;
} else {
String[] t = new String[result.length + r.length];
System.arraycopy(result, 0, t, 0, result.length);
System.arraycopy(r, 0, t, result.length, r.length);
result = t;
}
}
} while (parser.isPending());
return result;
}
}