/**
* 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.ports.metadata;
import com.rapidminer.operator.ports.InputPort;
import com.rapidminer.operator.ports.OutputPort;
import com.rapidminer.parameter.UndefinedParameterError;
/**
* @author Simon Fischer
*/
public class ExampleSetPassThroughRule extends PassThroughRule {
SetRelation relation;
public ExampleSetPassThroughRule(InputPort inputPort, OutputPort outputPort, SetRelation attributeSetRelation) {
super(inputPort, outputPort, false);
this.relation = attributeSetRelation;
}
@Override
public MetaData modifyMetaData(MetaData metaData) {
if (metaData instanceof ExampleSetMetaData) {
ExampleSetMetaData emd = (ExampleSetMetaData) metaData;
if (relation != null) {
emd.mergeSetRelation(relation);
}
try {
return modifyExampleSet(emd);
} catch (UndefinedParameterError e) {
return emd;
}
} else {
return metaData;
}
}
/**
* This method might be used for convenience for slight modifications of the exampleSet like
* adding an attribute. Subclasses might override this method.
*
* @throws UndefinedParameterError
*/
public ExampleSetMetaData modifyExampleSet(ExampleSetMetaData metaData) throws UndefinedParameterError {
return metaData;
}
}