/**
* 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.parameter.ParameterHandler;
import com.rapidminer.parameter.UndefinedParameterError;
/**
* This precondition wraps around another precondition and performs the check only if a parameter
* combination is fulfilled. If not, no checks will be performed. This might be used for parameter
* dependency aware checking.
*
* @author Sebastian Land
*
*/
public class ParameterConditionedPrecondition extends AbstractPrecondition {
private final Precondition condition;
private final String parameterKey;
private final String parameterValue;
private final ParameterHandler handler;
public ParameterConditionedPrecondition(InputPort inputPort, Precondition condition, ParameterHandler handler,
String parameterKey, String parameterValue) {
super(inputPort);
this.condition = condition;
this.parameterKey = parameterKey;
this.parameterValue = parameterValue;
this.handler = handler;
}
@Override
public void assumeSatisfied() {
condition.assumeSatisfied();
}
@Override
public void check(MetaData metaData) {
try {
if (handler.getParameterAsString(parameterKey).equals(parameterValue)) {
condition.check(metaData);
}
} catch (UndefinedParameterError e) {
// condition not applicable
}
}
@Override
public String getDescription() {
return condition.getDescription();
}
@Override
public boolean isCompatible(MetaData input, CompatibilityLevel level) {
return condition.isCompatible(input, level);
}
@Override
public MetaData getExpectedMetaData() {
return condition.getExpectedMetaData();
}
}