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Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2019 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports 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.
*
* JasperReports 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 JasperReports. If not, see .
*/
package net.sf.jasperreports.engine.data;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.text.DateFormat;
import java.text.NumberFormat;
import net.sf.jasperreports.engine.JRDataSource;
import net.sf.jasperreports.engine.JRDataSourceProvider;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRField;
import net.sf.jasperreports.engine.JasperReport;
/**
* @author Ionut Nedelcu ([email protected])
*/
public class JRCsvDataSourceProvider implements JRDataSourceProvider
{
public static final String EXCEPTION_MESSAGE_KEY_CANNOT_FIND_SOURCE = "data.csv.cannot.find.source";
private Reader reader;
private DateFormat dateFormat;
private char fieldDelimiter;
private String recordDelimiter;
private String[] columnNames;
private NumberFormat numberFormat;
/**
* @param stream an input stream containing CSV data
*/
public JRCsvDataSourceProvider(InputStream stream)
{
this(new InputStreamReader(stream));
}
/**
* Builds a datasource instance.
* @param file a file containing CSV data
*/
public JRCsvDataSourceProvider(File file) throws FileNotFoundException
{
this(new FileReader(file));
}
/**
* Builds a datasource instance.
* @param reader a Reader instance, for reading the stream
*/
public JRCsvDataSourceProvider(Reader reader)
{
this.reader = reader;
}
@Override
public boolean supportsGetFieldsOperation()
{
return false;
}
@Override
public JRField[] getFields(JasperReport report) throws JRException, UnsupportedOperationException
{
return null;
}
@Override
public JRDataSource create(JasperReport report) throws JRException
{
JRCsvDataSource ds;
if (reader != null)
{
ds = new JRCsvDataSource(reader);
}
else
{
throw
new JRException(
EXCEPTION_MESSAGE_KEY_CANNOT_FIND_SOURCE,
(Object[])null);
}
ds.setDateFormat(dateFormat);
ds.setNumberFormat(numberFormat);
ds.setFieldDelimiter(fieldDelimiter);
ds.setRecordDelimiter(recordDelimiter);
ds.setColumnNames(columnNames);
return ds;
}
@Override
public void dispose(JRDataSource dataSource) throws JRException
{
}
public String[] getColumnNames()
{
return columnNames;
}
public void setColumnNames(String[] colNames)
{
if (colNames == null)
{
this.columnNames = null;
}
else
{
this.columnNames = new String[colNames.length];
System.arraycopy(colNames, 0, this.columnNames, 0, colNames.length);
}
}
public DateFormat getDateFormat()
{
return dateFormat;
}
public void setDateFormat(DateFormat dateFormat)
{
this.dateFormat = dateFormat;
}
public char getFieldDelimiter()
{
return fieldDelimiter;
}
public void setFieldDelimiter(char fieldDelimiter)
{
this.fieldDelimiter = fieldDelimiter;
}
public String getRecordDelimiter()
{
return recordDelimiter;
}
public void setRecordDelimiter(String recordDelimiter)
{
this.recordDelimiter = recordDelimiter;
}
public NumberFormat getNumberFormat()
{
return numberFormat;
}
public void setNumberFormat(NumberFormat numberFormat)
{
this.numberFormat = numberFormat;
}
}