/*
* RapidMiner
*
* Copyright (C) 2001-2008 by Rapid-I and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapid-i.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.operator.io;
import java.util.Iterator;
import java.util.List;
import com.rapidminer.example.ExampleSet;
import com.rapidminer.operator.OperatorDescription;
import com.rapidminer.parameter.ParameterType;
import com.rapidminer.parameter.ParameterTypeFile;
/**
* <p>This operator can read csv files. All values must be separated by
* ",", by ";", or by white space like tabs.
* The first line is used for attribute names as default.</p>
*
* <p>For other file formats or column separators you can
* use in almost all cases the operator {@link SimpleExampleSource}
* or, if this is not sufficient, the operator {@link ExampleSource}.</p>
*
* @rapidminer.index csv
* @author Ingo Mierswa
* @version $Id: CSVExampleSource.java,v 1.5 2008/07/07 07:06:38 ingomierswa Exp $
*/
public class CSVExampleSource extends SimpleExampleSource {
public CSVExampleSource(OperatorDescription description) {
super(description);
}
public Class<?>[] getInputClasses() {
return new Class[0];
}
public Class<?>[] getOutputClasses() {
return new Class[] { ExampleSet.class };
}
public List<ParameterType> getParameterTypes() {
List<ParameterType> types = super.getParameterTypes();
Iterator<ParameterType> p = types.iterator();
while (p.hasNext()) {
ParameterType type = p.next();
if (type.getKey().equals(PARAMETER_READ_ATTRIBUTE_NAMES)) {
type.setDefaultValue(true);
} else if (type.getKey().equals(PARAMETER_FILENAME)) {
((ParameterTypeFile)type).setExtension("csv");
} else if (type.getKey().equals(PARAMETER_USE_QUOTES)) {
type.setDefaultValue(true);
} else if (type.getKey().equals(PARAMETER_COLUMN_SEPARATORS)) {
type.setDefaultValue(",\\s*|;\\s*");
}
}
return types;
}
}