/**
* Copyright (C) 2001-2017 by RapidMiner and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapidminer.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.set.ConditionCreationException;
import com.rapidminer.operator.UserError;
import com.rapidminer.operator.ports.metadata.AttributeMetaData;
import com.rapidminer.operator.ports.metadata.MetaDataInfo;
import com.rapidminer.parameter.ParameterHandler;
/**
* This filter actually does nothing and removes no attribute. It is needed to create a behavior
* consistent with earlier versions and to allow to bundle the filtering with an
* AttributeSubsetPreprocessing operator.
*
* @author Sebastian Land
*/
public class TransparentAttributeFilter extends AbstractAttributeFilterCondition {
@Override
public MetaDataInfo isFilteredOutMetaData(AttributeMetaData attribute, ParameterHandler handler)
throws ConditionCreationException {
return MetaDataInfo.NO;
}
@Override
public ScanResult beforeScanCheck(Attribute attribute) throws UserError {
return ScanResult.KEEP;
}
}