/*
* 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.preprocessing.filter.attributes;
import com.rapidminer.example.Attribute;
import com.rapidminer.example.Example;
import com.rapidminer.example.set.ConditionCreationException;
/**
* This Attribute Filter removes every attribute, which name does not match the
* Regular expression given by parameter. A data scan is not needed.
*
* @author Sebastian Land, Ingo Mierswa
* @version $Id: NameAttributeFilter.java,v 1.5 2008/07/19 16:31:17 ingomierswa Exp $
*/
public class NameAttributeFilter implements AttributeFilterCondition {
public boolean check(Attribute attribute, Example example) {
return false;
}
public boolean beforeScanCheck(Attribute attribute, String parameter, boolean invert) throws ConditionCreationException {
if ((parameter == null) || (parameter.length() == 0))
throw new ConditionCreationException("The condition for attribute names needs a parameter string.");
return invert ^ !attribute.getName().matches(parameter);
}
/** Initializes the check for the scan. */
public void initScanCheck() {}
public boolean isNeedingScan() {
return false;
}
}