/**
SpagoBI - The Business Intelligence Free Platform
Copyright (C) 2005-2008 Engineering Ingegneria Informatica S.p.A.
This library 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 2.1 of the License, or (at your option) any later version.
This library 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 this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
**/
package it.eng.spagobi.tools.dataset.bo;
import it.eng.spagobi.services.dataset.bo.SpagoBiDataSet;
import it.eng.spagobi.tools.dataset.common.dataproxy.FileDataProxy;
import it.eng.spagobi.tools.dataset.common.dataproxy.IDataProxy;
import it.eng.spagobi.tools.dataset.common.datareader.CsvDataReader;
import it.eng.spagobi.tools.dataset.common.datareader.XmlDataReader;
import org.apache.log4j.Logger;
/**
* @authors
* Angelo Bernabei
* angelo.bernabei@eng.it
* Giulio Gavardi
* giulio.gavardi@eng.it
* Andrea Gioia
* andrea.gioia@eng.it
*
*/
public class FileDataSet extends ConfigurableDataSet{
public static String DS_TYPE = "SbiFileDataSet";
private static transient Logger logger = Logger.getLogger(FileDataSet.class);
/**
* Instantiates a new empty file data set.
*/
public FileDataSet(){
super();
}
public FileDataSet( SpagoBiDataSet dataSetConfig ) {
super(dataSetConfig);
logger.debug("IN");
if(dataSetConfig.getFileName() == null || dataSetConfig.getFileName().length() == 0) {
throw new IllegalArgumentException("fileName member of SpagoBiDataSet object parameter cannot be null or empty" +
"while creating a FileDataSet. If you whant to create an empty FileDataSet use the proper constructor.");
}
logger.info("File name: " + dataSetConfig.getFileName());
setFileName( dataSetConfig.getFileName() );
logger.debug("OUT");
}
public SpagoBiDataSet toSpagoBiDataSet( ) {
SpagoBiDataSet sbd;
FileDataProxy dataProxy;
sbd = super.toSpagoBiDataSet();
sbd.setType( DS_TYPE );
dataProxy = (FileDataProxy)getDataProxy();
sbd.setFileName( dataProxy.getFileName() );
return sbd;
}
/**
* try to guess the proper dataReader to use depending on the file extension
*
* @param fileName the target filename
*/
public void setDataReader(String fileName) {
String fileExtension;
fileExtension = fileName.lastIndexOf('.') > 0 ? fileName.substring(fileName.lastIndexOf('.') + 1): null;
logger.debug("File extension: [" + fileExtension +"]");
if("csv".equalsIgnoreCase( fileExtension )) {
logger.info("File format: [CSV]");
setDataReader( new CsvDataReader() );
} else if ("xml".equalsIgnoreCase( fileExtension ) || "txt".equalsIgnoreCase( fileExtension )) {
logger.info("File format: [XML]");
setDataReader( new XmlDataReader() );
} else {
throw new IllegalArgumentException("[" + fileExtension+ "] is not a supported file extension");
}
}
public FileDataProxy getDataProxy() {
IDataProxy dataProxy;
dataProxy = super.getDataProxy();
if(dataProxy == null) {
setDataProxy( new FileDataProxy() );
dataProxy = getDataProxy();
}
if(!(dataProxy instanceof FileDataProxy)) throw new RuntimeException("DataProxy cannot be of type [" +
dataProxy.getClass().getName() + "] in FileDataSet");
return (FileDataProxy)dataProxy;
}
public String getFileName() {
return getDataProxy().getFileName();
}
public void setFileName(String fileName) {
setFileName(fileName, true);
}
public void setFileName(String fileName, boolean updateFileFormat) {
if(fileName == null || fileName.length() == 0) {
throw new IllegalArgumentException("fileName argument cannot be null or an empty string");
}
getDataProxy().setFileName(fileName);
if( updateFileFormat ) {
try{
setDataReader(fileName);
} catch (Exception e) {
throw new RuntimeException("Missing right exstension", e);
}
}
}
}