Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 34 | PointedEar | 1 | package ch.ffhs.webE.dao; |
| 2 | |||
| 3 | import java.util.ArrayList; |
||
| 4 | import java.util.List; |
||
| 5 | |||
| 6 | import org.hibernate.Session; |
||
| 7 | import org.hibernate.Transaction; |
||
| 8 | |||
| 9 | import ch.ffhs.webE.domain.Relationship; |
||
| 10 | |||
| 11 | import com.googlecode.s2hibernate.struts2.plugin.annotations.SessionTarget; |
||
| 12 | import com.googlecode.s2hibernate.struts2.plugin.annotations.TransactionTarget; |
||
| 13 | |||
| 14 | /** |
||
| 15 | * Implements the Database Access Object for terms |
||
| 16 | * |
||
| 17 | * @author Thomas Lahn |
||
| 18 | */ |
||
| 19 | public class RelationshipDAOImpl |
||
| 20 | { |
||
| 21 | /** |
||
| 22 | * Database session |
||
| 23 | */ |
||
| 24 | @SessionTarget |
||
| 25 | Session session; |
||
| 26 | |||
| 27 | /** |
||
| 28 | * Database transaction |
||
| 29 | */ |
||
| 30 | @TransactionTarget |
||
| 31 | Transaction transaction; |
||
| 32 | |||
| 33 | /** |
||
| 34 | * Creates a list of all relationships |
||
| 35 | * |
||
| 36 | * @return an ArrayList with all the relationshops - in case of a problem, an |
||
| 37 | * empty list is returned |
||
| 38 | */ |
||
| 39 | @SuppressWarnings("unchecked") |
||
| 40 | public List<Relationship> listRelationships() |
||
| 41 | { |
||
| 42 | List<Relationship> relationship = null; |
||
| 43 | try |
||
| 44 | { |
||
| 45 | relationship = this.session.createQuery("from Relationship").list(); //$NON-NLS-1$ |
||
| 46 | } |
||
| 47 | catch (Exception e) |
||
| 48 | { |
||
| 49 | e.printStackTrace(); |
||
| 50 | } |
||
| 51 | |||
| 52 | /* |
||
| 53 | * If no relationship was checked, return an empty list to mitigate null |
||
| 54 | * pointer exceptions |
||
| 55 | */ |
||
| 56 | if (relationship == null) |
||
| 57 | { |
||
| 58 | relationship = new ArrayList<Relationship>(); |
||
| 59 | } |
||
| 60 | |||
| 61 | return relationship; |
||
| 62 | } |
||
| 63 | |||
| 64 | /** |
||
| 65 | * Executes the query to save the relationship |
||
| 66 | * |
||
| 67 | * @param relationship |
||
| 68 | * Domain object to be saved |
||
| 69 | * @return <code>true</code> if successful, <code>false</code> otherwise |
||
| 70 | */ |
||
| 71 | public boolean saveOrUpdate(Relationship relationship) |
||
| 72 | { |
||
| 73 | try |
||
| 74 | { |
||
| 75 | relationship.setObjectId(relationship.getObjectId()); |
||
| 76 | this.session.saveOrUpdate(relationship); |
||
| 77 | return true; |
||
| 78 | } |
||
| 79 | catch (Exception e) |
||
| 80 | { |
||
| 81 | this.transaction.rollback(); |
||
| 82 | e.printStackTrace(); |
||
| 83 | return false; |
||
| 84 | } |
||
| 85 | } |
||
| 86 | |||
| 87 | /** |
||
| 88 | * Delete a relationship |
||
| 89 | * |
||
| 90 | * @param id |
||
| 91 | * Relationship ID |
||
| 92 | */ |
||
| 93 | public void deleteRelationship(int id) |
||
| 94 | { |
||
| 95 | try |
||
| 96 | { |
||
| 97 | Relationship relationship = (Relationship) this.session.get( |
||
| 98 | Relationship.class, id); |
||
| 99 | this.session.delete(relationship); |
||
| 100 | } |
||
| 101 | catch (Exception e) |
||
| 102 | { |
||
| 103 | this.transaction.rollback(); |
||
| 104 | e.printStackTrace(); |
||
| 105 | } |
||
| 106 | } |
||
| 107 | |||
| 108 | /** |
||
| 109 | * Retrieves a relationship by ID |
||
| 110 | * |
||
| 111 | * @param id |
||
| 112 | * Term ID |
||
| 113 | * @return The relationship with this <var>id</var> |
||
| 114 | */ |
||
| 115 | public Relationship getRelationshipById(int id) |
||
| 116 | { |
||
| 117 | Relationship relationship = null; |
||
| 118 | |||
| 119 | try |
||
| 120 | { |
||
| 121 | relationship = (Relationship) this.session.get(Relationship.class, id); |
||
| 122 | } |
||
| 123 | catch (Exception e) |
||
| 124 | { |
||
| 125 | e.printStackTrace(); |
||
| 126 | } |
||
| 127 | |||
| 128 | return relationship; |
||
| 129 | } |
||
| 130 | } |