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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.primitive;
19  
20  import java.io.Serializable;
21  
22  /**
23   * Primitive specialization of Function:
24   * (double) -> T
25   *
26   * @param <T> Result type
27   */
28  public interface Double2ObjFunction<T> extends Serializable {
29    /**
30     * Returns the result of applying this function to given {@code input}.
31     *
32     * The returned object may or may not be a new instance,
33     * depending on the implementation.
34     *
35     * @param input input
36     * @return result
37     */
38    T apply(double input);
39  }