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/* Copyright (C) 2013-2014 TU Dortmund
 * This file is part of LearnLib, http://www.learnlib.de/.
 * 
 * LearnLib is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 3.0 as published by the Free Software Foundation.
 * 
 * LearnLib 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with LearnLib; if not, see
 * http://www.gnu.de/documents/lgpl.en.html.
 */
package de.learnlib.oracles;

import java.util.Collections;

import javax.annotation.Nullable;
import javax.annotation.ParametersAreNonnullByDefault;

import net.automatalib.words.Word;
import de.learnlib.api.MembershipOracle;
import de.learnlib.api.QueryAnswerer;

@ParametersAreNonnullByDefault
public final class OracleQueryAnswerer implements QueryAnswerer {
	
	private final MembershipOracle oracle;
	
	public OracleQueryAnswerer(MembershipOracle oracle) {
		this.oracle = oracle;
	}

	@Override
	@Nullable
	public O answerQuery(Word prefix, Word suffix) {
		DefaultQuery query = new DefaultQuery<>(prefix, suffix);
		oracle.processQueries(Collections.singleton(query));
		return query.getOutput();
	}

}