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1   /*
2    * Copyright (c) 2002-2018, Mairie de Paris
3    * All rights reserved.
4    *
5    * Redistribution and use in source and binary forms, with or without
6    * modification, are permitted provided that the following conditions
7    * are met:
8    *
9    *  1. Redistributions of source code must retain the above copyright notice
10   *     and the following disclaimer.
11   *
12   *  2. Redistributions in binary form must reproduce the above copyright notice
13   *     and the following disclaimer in the documentation and/or other materials
14   *     provided with the distribution.
15   *
16   *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
17   *     contributors may be used to endorse or promote products derived from
18   *     this software without specific prior written permission.
19   *
20   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
24   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30   * POSSIBILITY OF SUCH DAMAGE.
31   *
32   * License 1.0
33   */
34  package fr.paris.lutece.plugins.appointment.service;
35  
36  import java.time.LocalDate;
37  import java.time.LocalDateTime;
38  import java.time.format.DateTimeFormatter;
39  import java.util.List;
40  
41  /**
42   * Class of utilities
43   * 
44   * @author Laurent Payen
45   *
46   */
47  public final class Utilities
48  {
49  
50      public static final String FORMAT_DATE = "dd/MM/yyyy";
51      private static DateTimeFormatter _formatter = DateTimeFormatter.ofPattern( FORMAT_DATE );
52  
53      /**
54       * Private constructor - this class does not need to be instantiated
55       */
56      private Utilities( )
57      {
58      }
59  
60      /**
61       * Getter for the formatter
62       * 
63       * @return the formatter
64       */
65      public static DateTimeFormatter getFormatter( )
66      {
67          return _formatter;
68      }
69  
70      /**
71       * Setter for the formatter
72       * 
73       * @param formatter
74       *            the formatter to set
75       */
76      public static void setFormatter( DateTimeFormatter formatter )
77      {
78          _formatter = formatter;
79      }
80  
81      /**
82       * Return the closest date in past a list of date with the given date
83       * 
84       * @param listDate
85       *            the list of date
86       * @param dateToSearch
87       *            the date to search
88       * @return the closest date in past
89       */
90      public static LocalDate getClosestDateInPast( List<LocalDate> listDate, LocalDate dateToSearch )
91      {
92          return listDate.stream( ).filter( x -> x.isBefore( dateToSearch ) || x.isEqual( dateToSearch ) ).max( LocalDate::compareTo ).orElse( null );
93      }
94  
95      /**
96       * Return the closest date time in future in a list of date time and a given date time
97       * 
98       * @param listDateTime
99       *            the list of date time
100      * @param dateTimeToSearch
101      *            the date time to search
102      * @return the closest date time in the list in the future of the given date time
103      */
104     public static LocalDateTime getClosestDateTimeInFuture( List<LocalDateTime> listDateTime, LocalDateTime dateTimeToSearch )
105     {
106         return listDateTime.stream( ).filter( x -> x.isAfter( dateTimeToSearch ) || x.isEqual( dateTimeToSearch ) ).min( LocalDateTime::compareTo )
107                 .orElse( null );
108     }
109 
110 }