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