PrologCallable.java

/*-
 * #%L
 * prolobjectlink-jpi
 * %%
 * Copyright (C) 2020 - 2021 Prolobjectlink Project
 * %%
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 * of this software and associated documentation files (the "Software"), to deal
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 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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package io.github.prolobjectlink.prolog;

import java.util.List;
import java.util.concurrent.Callable;

class PrologCallable implements Callable<List<List<Object>>> {

	private final PrologTerm[] goals;
	private final PrologEngine engine;
	private final PrologProvider provider;

	PrologCallable(PrologProvider provider, PrologTerm... goals) {
		this.engine = provider.newEngine();
		this.provider = provider;
		this.goals = goals;
	}

	public List<List<Object>> call() throws Exception {
		return engine.query(goals).allResults();
	}

	public PrologProvider getProvider() {
		return provider;
	}

}