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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package com.github.dexecutor.core.task;
19  
20  /**
21   * A Task Provider provides Tasks to be executed, when it comes to execution
22   * @author Nadeem Mohammad
23   *
24   * @param <T> Type of Node/Task ID
25   * @param <R> Type of Node/Task result
26   */
27  public interface TaskProvider <T extends Comparable<T>, R> {
28  	/**
29  	 * Given the node id, returns the task to be executed, while building graph only the node ids are required, when it comes to execution Task objects would be constructed
30  	 * 
31  	 * @param id task id
32  	 * @return task the task which should be executed
33  	 */
34  	public Task<T, R> provideTask(final T id);	
35  }