Rev 34 | 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; |
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| 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; |
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| 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 | /** |
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| 37 | PointedEar | 22 | * Database session |
| 31 | PointedEar | 23 | */ |
| 37 | PointedEar | 24 | @SessionTarget |
| 25 | Session session; |
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| 31 | PointedEar | 26 | |
| 27 | /** |
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| 37 | PointedEar | 28 | * Database transaction |
| 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 | * Returns a list of all terms |
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| 35 | * |
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| 36 | * @return an ArrayList with all the terms - in case of a problem, an empty |
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| 37 | * list is returned |
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| 38 | */ |
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| 39 | @SuppressWarnings("unchecked") |
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| 40 | public List<Term> getList() |
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| 41 | { |
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| 42 | List<Term> term = null; |
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| 43 | try |
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| 44 | { |
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| 45 | term = this.session.createQuery("from Term").list(); //$NON-NLS-1$ |
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| 46 | } |
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| 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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| 60 | |||
| 61 | return term; |
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| 62 | } |
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| 63 | |||
| 64 | /** |
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| 65 | * Executes the query to save the term |
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| 66 | * |
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| 67 | * @param term |
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| 68 | * Domain object to be saved |
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| 69 | * @return <code>true</code> if successful, <code>false</code> otherwise |
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| 70 | */ |
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| 71 | public boolean saveOrUpdate(Term term) |
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| 72 | { |
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| 73 | try |
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| 74 | { |
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| 75 | term.setObjectId(term.getObjectId()); |
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| 76 | this.session.saveOrUpdate(term); |
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| 77 | return true; |
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| 78 | } |
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| 79 | catch (Exception e) |
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| 80 | { |
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| 81 | this.transaction.rollback(); |
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| 82 | e.printStackTrace(); |
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| 83 | return false; |
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| 84 | } |
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| 85 | } |
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| 86 | |||
| 87 | /** |
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| 31 | PointedEar | 88 | * Delete a term |
| 89 | * |
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| 90 | * @param termId |
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| 91 | * Term ID |
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| 92 | */ |
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| 37 | PointedEar | 93 | public void delete(int termId) |
| 94 | { |
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| 95 | try |
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| 96 | { |
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| 97 | Term term = (Term) this.session.get(Term.class, termId); |
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| 98 | this.session.delete(term); |
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| 99 | } |
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| 100 | catch (Exception e) |
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| 101 | { |
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| 102 | this.transaction.rollback(); |
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| 103 | e.printStackTrace(); |
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| 104 | } |
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| 105 | } |
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| 31 | PointedEar | 106 | |
| 107 | /** |
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| 33 | PointedEar | 108 | * Retrieves a term by ID |
| 109 | * |
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| 31 | PointedEar | 110 | * @param termId |
| 111 | * @return |
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| 112 | */ |
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| 37 | PointedEar | 113 | public Term getById(int termId) |
| 114 | { |
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| 115 | Term term = null; |
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| 31 | PointedEar | 116 | |
| 37 | PointedEar | 117 | try |
| 118 | { |
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| 119 | term = (Term) this.session.get(Term.class, termId); |
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| 120 | } |
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| 121 | catch (Exception e) |
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| 122 | { |
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| 123 | e.printStackTrace(); |
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| 124 | } |
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| 125 | |||
| 126 | return term; |
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| 127 | } |
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| 128 | } |