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/*
* Copyright (C) 2013-2015 TU Dortmund
* This file is part of LearnLib, http://www.learnlib.de/.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package de.learnlib.oracles;
import java.util.Collection;
import javax.annotation.Nonnull;
import javax.annotation.ParametersAreNonnullByDefault;
import de.learnlib.api.MembershipOracle;
import de.learnlib.api.Query;
import de.learnlib.statistics.HistogramDataSet;
import de.learnlib.statistics.StatisticOracle;
/**
* Collects a histogram of passed query lengths.
*
* @param input symbol class
* @param output symbol class
*
* @author falkhowar
*/
@ParametersAreNonnullByDefault
public class HistogramOracle implements StatisticOracle {
/**
* dataset to be collected.
*/
private final HistogramDataSet dataSet;
/**
* oracle used to answer queries.
*/
private MembershipOracle nextOracle;
/**
*
* @param next real oracle
* @param name name of the collected data set
*/
public HistogramOracle(MembershipOracle next, String name) {
this.nextOracle = next;
this.dataSet = new HistogramDataSet(name, "query length");
}
@Override
public final void processQueries(Collection> queries) {
for (Query q : queries) {
this.dataSet.addDataPoint((long) q.getInput().size());
}
nextOracle.processQueries(queries);
}
/**
* @return the data set collected by this oracle.
*/
@Override
@Nonnull
public final HistogramDataSet getStatisticalData() {
return this.dataSet;
}
/**
* set used oracle.
*
* @param next oracle to be used
*/
@Override
public final void setNext(final MembershipOracle next) {
this.nextOracle = next;
}
}