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| import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.Writer;
import java.nio.charset.Charset;
import java.util.Vector;
/**
* @author Glob
* @version 0.1
*/
public class CSVFile {
private int m_rowsCount;
private int m_colsCount;
private Vector m_fileContent;
private final static char CELL_SEPARATOR = ';';
/**
* Method CSVFile.
* @param path le chemin du fichier à parser.
* @throws FileNotFoundException si le fichier spécifié n'existe pas.
*/
public CSVFile(String path) throws FileNotFoundException {
m_fileContent = new Vector();
InputStreamReader fileReader = new InputStreamReader(new FileInputStream(path), Charset.forName("UTF-8"));
// FileReader fileReader = new FileReader(path);
readFromFile(fileReader);
fitVectorsToSize();
}
/**
* Method CSVFile.
* @param reader un reader dans lequel on lit le fichier CSV.
*/
public CSVFile(Reader reader) {
m_fileContent = new Vector();
readFromFile(reader);
fitVectorsToSize();
}
private void fitVectorsToSize() {
m_fileContent.setSize(getRowsCount());
int fileSize = getRowsCount();
int colCount = getColsCount();
for (int i = 0; i < fileSize; i++) {
Vector aRow = (Vector)m_fileContent.get(i);
if (aRow == null) {
m_fileContent.set(i, new Vector());
aRow = (Vector)m_fileContent.get(i);
}
aRow.setSize(colCount);
}
}
/**
* Method readFromFile.
* @param path
*/
private void readFromFile(Reader reader) {
BufferedReader buffReader = new BufferedReader(reader);
if (buffReader != null) {
try {
String tempLine;
tempLine = buffReader.readLine();
while (tempLine != null) {
readFromLine(tempLine);
tempLine = buffReader.readLine();
}
} catch (IOException e) {
System.err.println("Error reading CSV file: " + e.toString());
} finally {
try {
buffReader.close();
} catch (IOException e) {
System.err.println(
"Erreur closing CSV file: "
+ e.toString()
);
}
}
}
System.runFinalization();
System.gc();
}
/**
* Method readFromLine.
* @param tempLine
*/
private void readFromLine(String tempLine) {
if (tempLine == null) {
return;
}
Vector currentLine = new Vector();
m_fileContent.add(currentLine);
m_rowsCount++;
// setRowsCount(getRowsCount() + 1);
if (tempLine.trim().length() == 0) {
return;
}
int colCount = 0;
int cursorBegin = 0;
int cursorEnd = tempLine.indexOf(CELL_SEPARATOR);
while (cursorBegin > -1) {
if (cursorEnd == -1) {
currentLine.add(tempLine.substring(cursorBegin));
cursorBegin = cursorEnd;
} else {
currentLine.add(tempLine.substring(cursorBegin, cursorEnd));
cursorBegin = cursorEnd + 1;
}
cursorEnd = tempLine.indexOf(CELL_SEPARATOR, cursorBegin);
colCount++;
}
if (colCount > getColsCount()) {
setColsCount(Math.max(getColsCount(), colCount));
}
}
/**
* Returns the colsCount.
* @return int
*/
public int getColsCount() {
return m_colsCount;
}
/**
* Returns the rowsCount.
* @return int
*/
public int getRowsCount() {
return m_rowsCount;
}
/**
* Sets the colsCount.
* @param colsCount The colsCount to set
*/
public void setColsCount(int colsCount) {
m_colsCount = colsCount;
fitVectorsToSize();
}
/**
* Sets the rowsCount.
* @param rowsCount The rowsCount to set
*/
public void setRowsCount(int rowsCount) {
m_rowsCount = rowsCount;
fitVectorsToSize();
}
/**
* Method getData.
* @param row la ligne voulue
* @param col la colonne voulue
* @return String la valeur à l'enplacement spécifié. Null si outOfBound.
*/
public String getData(int row, int col) {
if (row < 0
|| col < 0
|| row > (getRowsCount() - 1)
|| col > (getColsCount() - 1)) {
return null;
}
try {
Vector theRow = (Vector)m_fileContent.get(row);
String result = (String)theRow.get(col);
return (result == null ? "" : result);
} catch (IndexOutOfBoundsException e) {
return "";
}
}
/**
* Method setData.
* @param row le numéro de ligne (commence à 0).
* @param col le numéro de colonne (commence à 0).
* @param data les données à insérer.
*/
public void setData(int row, int col, String data) {
if (row < 0
|| col < 0
|| row > (getRowsCount() - 1)
|| col > (getColsCount() - 1)) {
throw new IndexOutOfBoundsException();
}
Vector theRow = (Vector)m_fileContent.get(row);
theRow.setElementAt(data, col);
}
/**
* Method write.
* @param filePath le fichier dans lequel sauver les données.
* @throws IOException si une erreur survient.
*/
public void write(String filePath) throws IOException {
FileWriter fileWriter = new FileWriter(filePath);
write(fileWriter);
}
/**
* Method write.
* @param aWriter le writer dans lequel on veut écrire les données.
* @throws IOException si une erreur survient.
*/
public void write(Writer aWriter) throws IOException {
BufferedWriter writer;
writer = new BufferedWriter(aWriter);
int fileSize = getRowsCount();
int colCount = getColsCount();
for (int i = 0; i < fileSize; i++) {
for (int j = 0; j < colCount; j++) {
writer.write(getData(i, j));
if (j + 1 < colCount) {
writer.write(CELL_SEPARATOR);
}
}
if (i + 1 < fileSize) {
writer.write("\n");
}
}
writer.flush();
writer.close();
}
} |
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