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task4/solution11/src/org/apidesign/apifest08/currency/DateUtil.java
author Jaroslav Tulach <jtulach@netbeans.org>
Sat, 25 Oct 2008 20:53:00 +0200
changeset 84 2ae6e4aa7aef
permissions -rw-r--r--
Solutions by Petr Smid 
     1 package org.apidesign.apifest08.currency;

     2 

     3 import java.util.Date;

     4 

     5 /**

     6  * Date util helper class.

     7  * @author ked

     8  */

     9 final class DateUtil {

    10 

    11     private DateUtil() {};

    12 

    13     static boolean isInRange(Date instant, Date from, Date till) {

    14         if ((from == null || instant.equals(from) || instant.after(from)) &&

    15                 (till == null || instant.before(till))) {

    16             return true;

    17         } else {

    18             return false;

    19         }

    20     }

    21 

    22     static boolean isRangesOverlapping(Date fromA, Date tillA, Date fromB, Date tillB) {

    23         if ((fromA == null && tillA == null) || (fromB == null && tillB == null)) {

    24             return true;

    25         }

    26         if (fromA != null && isInRange(fromA, fromB, tillB)) {

    27             return true;

    28         }

    29         if (tillA != null && !tillA.equals(fromB) && isInRange(tillA, fromB, tillB)) {

    30             return true;

    31         }

    32         if (fromB != null && isInRange(fromB, fromA, tillA)) {

    33             return true;

    34         }

    35         if (tillB != null && !tillB.equals(fromA) && isInRange(tillB, fromA, tillA)) {

    36             return true;

    37         }

    38         return false;

    39     }

    40 

    41     static Date getRangesIntersectionBottom(Date fromA, Date fromB) {

    42         if (fromA == null) {

    43             return fromB;

    44         }

    45         if (fromB == null) {

    46             return fromA;

    47         }

    48         if (fromA.after(fromB)) {

    49             return fromA;

    50         } else {

    51             return fromB;

    52         }

    53     }

    54 

    55     static Date getRangesIntersectionTop(Date tillA, Date tillB) {

    56         if (tillA == null) {

    57             return tillB;

    58         }

    59         if (tillB == null) {

    60             return tillA;

    61         }

    62         if (tillA.before(tillB)) {

    63             return tillA;

    64         } else {

    65             return tillB;

    66         }

    67     }

    68 }
hg/apifest08