Rev 34 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
31 | PointedEar | 1 | package ch.ffhs.webE.dao; |
2 | |||
37 | PointedEar | 3 | import java.util.ArrayList; |
31 | PointedEar | 4 | import java.util.List; |
5 | |||
37 | PointedEar | 6 | import org.hibernate.Session; |
7 | import org.hibernate.Transaction; |
||
8 | |||
31 | PointedEar | 9 | import ch.ffhs.webE.domain.Term; |
10 | |||
37 | PointedEar | 11 | import com.googlecode.s2hibernate.struts2.plugin.annotations.SessionTarget; |
12 | import com.googlecode.s2hibernate.struts2.plugin.annotations.TransactionTarget; |
||
13 | |||
31 | PointedEar | 14 | /** |
37 | PointedEar | 15 | * Implements the Database Access Object for terms |
31 | PointedEar | 16 | * |
37 | PointedEar | 17 | * @author Thomas Lahn |
31 | PointedEar | 18 | */ |
37 | PointedEar | 19 | public class TermDAO |
31 | PointedEar | 20 | { |
21 | /** |
||
37 | PointedEar | 22 | * Database session |
31 | PointedEar | 23 | */ |
37 | PointedEar | 24 | @SessionTarget |
25 | Session session; |
||
31 | PointedEar | 26 | |
27 | /** |
||
37 | PointedEar | 28 | * Database transaction |
29 | */ |
||
30 | @TransactionTarget |
||
31 | Transaction transaction; |
||
32 | |||
33 | /** |
||
34 | * Returns a list of all terms |
||
35 | * |
||
36 | * @return an ArrayList with all the terms - in case of a problem, an empty |
||
37 | * list is returned |
||
38 | */ |
||
39 | @SuppressWarnings("unchecked") |
||
40 | public List<Term> getList() |
||
41 | { |
||
42 | List<Term> term = null; |
||
43 | try |
||
44 | { |
||
45 | term = this.session.createQuery("from Term").list(); //$NON-NLS-1$ |
||
46 | } |
||
47 | catch (Exception e) |
||
48 | { |
||
49 | e.printStackTrace(); |
||
50 | } |
||
51 | |||
52 | /* |
||
53 | * If no term was checked, return an empty list to mitigate null pointer |
||
54 | * exceptions |
||
55 | */ |
||
56 | if (term == null) |
||
57 | { |
||
58 | term = new ArrayList<Term>(); |
||
59 | } |
||
60 | |||
61 | return term; |
||
62 | } |
||
63 | |||
64 | /** |
||
65 | * Executes the query to save the term |
||
66 | * |
||
67 | * @param term |
||
68 | * Domain object to be saved |
||
69 | * @return <code>true</code> if successful, <code>false</code> otherwise |
||
70 | */ |
||
71 | public boolean saveOrUpdate(Term term) |
||
72 | { |
||
73 | try |
||
74 | { |
||
75 | term.setObjectId(term.getObjectId()); |
||
76 | this.session.saveOrUpdate(term); |
||
77 | return true; |
||
78 | } |
||
79 | catch (Exception e) |
||
80 | { |
||
81 | this.transaction.rollback(); |
||
82 | e.printStackTrace(); |
||
83 | return false; |
||
84 | } |
||
85 | } |
||
86 | |||
87 | /** |
||
31 | PointedEar | 88 | * Delete a term |
89 | * |
||
90 | * @param termId |
||
91 | * Term ID |
||
92 | */ |
||
37 | PointedEar | 93 | public void delete(int termId) |
94 | { |
||
95 | try |
||
96 | { |
||
97 | Term term = (Term) this.session.get(Term.class, termId); |
||
98 | this.session.delete(term); |
||
99 | } |
||
100 | catch (Exception e) |
||
101 | { |
||
102 | this.transaction.rollback(); |
||
103 | e.printStackTrace(); |
||
104 | } |
||
105 | } |
||
31 | PointedEar | 106 | |
107 | /** |
||
33 | PointedEar | 108 | * Retrieves a term by ID |
109 | * |
||
31 | PointedEar | 110 | * @param termId |
111 | * @return |
||
112 | */ |
||
37 | PointedEar | 113 | public Term getById(int termId) |
114 | { |
||
115 | Term term = null; |
||
31 | PointedEar | 116 | |
37 | PointedEar | 117 | try |
118 | { |
||
119 | term = (Term) this.session.get(Term.class, termId); |
||
120 | } |
||
121 | catch (Exception e) |
||
122 | { |
||
123 | e.printStackTrace(); |
||
124 | } |
||
125 | |||
126 | return term; |
||
127 | } |
||
128 | } |