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Supplier xref
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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.giraph.function;
19  
20  import java.io.Serializable;
21  
22  /**
23   * Function:
24   * () -> T
25   * <br>
26   * Specialization of com.google.common.base.Supplier, that is also
27   * Serializable.
28   *
29   * @param <T> Result type
30   */
31  public interface Supplier<T> extends Serializable {
32    /**
33     * Retrieves an instance of the appropriate type. The returned object may or
34     * may not be a new instance, depending on the implementation.
35     *
36     * @return result
37     */
38    T get();
39  }