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# | Location | File | Last Modified |
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1 | admin_portal_reeng_2018.1.0.0.zip\admin portal reeng\mhv_source\mhv_admin\mhv-admin-main\src\main\java\gov\va\med\mhv\admin\registry | ModelObject.java | Wed Aug 23 04:11:24 2017 UTC |
2 | admin_portal_reeng_2018.1.0.0.zip\admin portal reeng\mhv_source\mhv_admin\mhv-admin-main\src\main\java\gov\va\med\mhv\admin\registry | ModelObject.java | Tue Nov 28 20:42:25 2017 UTC |
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1 | /** | |
2 | * | |
3 | */ | |
4 | package go v.va.med.m hv.admin.r egistry; | |
5 | ||
6 | /** | |
7 | * @author
|
|
8 | * | |
9 | */ | |
10 | public abs tract clas s ModelObj ect { | |
11 | ||
12 | /** | |
13 | * Nul l-safe det ermination of hasCod e of an ob ject | |
14 | * @pa ram value The object to get th e hashcode for | |
15 | * @re turn The h ashcode of value, 0 if the val ue is null | |
16 | */ | |
17 | protec ted static int hashC odeOrZero( Object val ue) { | |
18 | re turn (valu e != null) ? value.h ashCode() : 0; | |
19 | } | |
20 | ||
21 | /** | |
22 | * Nul l-safe equ ality comp arison of objects. | |
23 | * @pa ram value Value to c ompare | |
24 | * @pa ram otherV alue The o ther value to compar e it to | |
25 | * @re turn True, if both o bjects are null or t he objects are equal as | |
26 | * ind icated by the equals () method; false oth erwise. | |
27 | */ | |
28 | protec ted static boolean a reEqual(Ob ject value , Object o therValue) { | |
29 | re turn ((val ue == null ) && (othe rValue == null)) | |
30 | || ((val ue != null ) && value .equals(ot herValue)) ; | |
31 | } | |
32 | ||
33 | /** | |
34 | * Cal culates a hash code from the h ash codes of set of objects. | |
35 | * Not e that an object doe s not need to provid e all fiel ds to calc ulate | |
36 | * a h ashCode. J ust use fi elds that will most likely be discrimina ting, | |
37 | * suc h that dif ferent val ue for the se fields leads to d ifferent h ash codes. | |
38 | * Usi ng 2-3 fie lds probab ly suffici ent. | |
39 | * @pa ram fields The field s used to calculate the hash c ode | |
40 | * @re turn The c alculated hash code value | |
41 | */ | |
42 | protec ted static int hashC ode(Object [] fields) { | |
43 | fi nal int PR IME = 31; | |
44 | in t hashCode = 1; | |
45 | // TODO: Thi s code cou ld overflo w the maxi mum intege r, | |
46 | // as the re sult can g row quickl y, if any of the fie lds | |
47 | // hashcodes are big. | |
48 | if (fields ! = null) { | |
49 | for (Obj ect field: fields) { | |
50 | hash Code = PRI ME * hashC ode + hash CodeOrZero (field); | |
51 | } | |
52 | } | |
53 | re turn hashC ode; | |
54 | ||
55 | } | |
56 | ||
57 | } |
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