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1   /*-
2    * #%L
3    * prolobjectlink-jpi
4    * %%
5    * Copyright (C) 2020 - 2021 Prolobjectlink Project
6    * %%
7    * Permission is hereby granted, free of charge, to any person obtaining a copy
8    * of this software and associated documentation files (the "Software"), to deal
9    * in the Software without restriction, including without limitation the rights
10   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11   * copies of the Software, and to permit persons to whom the Software is
12   * furnished to do so, subject to the following conditions:
13   * 
14   * The above copyright notice and this permission notice shall be included in
15   * all copies or substantial portions of the Software.
16   * 
17   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23   * THE SOFTWARE.
24   * #L%
25   */
26  package io.github.prolobjectlink.prolog;
27  
28  import java.util.List;
29  import java.util.concurrent.Callable;
30  
31  class PrologCallable implements Callable<List<List<Object>>> {
32  
33  	private final PrologTerm[] goals;
34  	private final PrologEngine engine;
35  	private final PrologProvider provider;
36  
37  	PrologCallable(PrologProvider provider, PrologTerm... goals) {
38  		this.engine = provider.newEngine();
39  		this.provider = provider;
40  		this.goals = goals;
41  	}
42  
43  	public List<List<Object>> call() throws Exception {
44  		return engine.query(goals).allResults();
45  	}
46  
47  	public PrologProvider getProvider() {
48  		return provider;
49  	}
50  
51  }