package org.drools.decisiontable.parser.csv;
/*
* Copyright 2005 (C) The Werken Company. All Rights Reserved.
*
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided that the
* following conditions are met:
*
* 1. Redistributions of source code must retain copyright statements and
* notices. Redistributions must also contain a copy of this document.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The name "drools" must not be used to endorse or promote products derived
* from this Software without prior written permission of The Werken Company.
* For written permission, please contact bob@werken.com.
*
* 4. Products derived from this Software may not be called "drools" nor may
* "drools" appear in their names without prior written permission of The Werken
* Company. "drools" is a registered trademark of The Werken Company.
*
* 5. Due credit should be given to The Werken Company.
* (http://drools.werken.com/).
*
* THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE WERKEN COMPANY OR ITS CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
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*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.List;
import org.drools.decisiontable.parser.DecisionTableParseException;
import org.drools.decisiontable.parser.DecisionTableParser;
import org.drools.decisiontable.parser.SheetListener;
/**
* Csv implementation.
* This implementation removes empty "cells" at the end of each line.
* Different CSV tools may or may not put heaps of empty cells in.
*
* @author <a href="mailto:michael.neale@gmail.com"> Michael Neale</a>
*/
public class CsvParser implements DecisionTableParser
{
private SheetListener _listener;
private CsvLineParser _lineParser;
public CsvParser(SheetListener listener, CsvLineParser lineParser) {
_listener = listener;
_lineParser = lineParser;
}
public void parseFile(InputStream inStream) {
BufferedReader reader = new BufferedReader(new InputStreamReader(inStream));
try {
_listener.startSheet("csv");
processRows(reader);
_listener.finishSheet();
} catch (IOException e) {
throw new DecisionTableParseException("An error occurred reading the CSV data.", e);
}
}
private void processRows(BufferedReader reader) throws IOException {
String line = reader.readLine();
int row = 0;
while (line != null) {
List cells = _lineParser.parse(line);
//remove the trailing empty "cells" which some tools smatter around
//trimCells(cells);
_listener.newRow(row, cells.size());
for (int col = 0; col < cells.size(); col++) {
String cell = (String) cells.get(col);
_listener.newCell(row, col, cell);
}
row++;
line = reader.readLine();
}
}
/** remove the trailing empty cells */
private void trimCells(List cells)
{
for (int i = cells.size() - 1; i > 0; i--) {
String cell = (String) cells.get(i);
if (!cell.trim().equals("")) {
return;
} else {
cells.remove(i);
}
}
}
}