Examples of org.exolab.castor.jdo.Database

org.exolab.castor.jdo.Database
a database and start a transaction db = jdo.getDatabase(); db.begin(); // Select all the products in a given group oql = db.getOQLQuery( "SELECT p FROM Product p WHERE group=$"); oql.bind( groupId ); results = oql.execute(); while ( results.hasMore() ) { // A 25% mark down for each product and mark as sale prod = (Product) results.next(); prod.markDown( 0.25 ); prod.setOnSale( true ); } // Commit all changes, close the database db.commit(); db.close(); @author Assaf Arkin @version $Revision: 7976 $ $Date: 2006-03-16 16:04:24 -0700 (Thu, 16 Mar 2006) $ @see JDOManager#getDatabase() @see Query

    }


    public void testLoadChild() throws Exception {
        Lazy1to1Child child = null;


        Database db = _category.getDatabase();


        db.begin();
        child = (Lazy1to1Child) db.load(Lazy1to1Child.class, new Integer (1));
        assertChild(child, 1, "child 1");
        db.commit();
        
        db.close();
    }

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    }


    public void testLoadChildReadOnly() throws Exception {
        Lazy1to1Child child = null;


        Database db = _category.getDatabase();


        db.begin();
        child = (Lazy1to1Child) db.load(Lazy1to1Child.class, new Integer (1),
                                        AccessMode.ReadOnly);
        assertChild(child, 1, "child 1");
        db.commit();
        
        db.close();
    }

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    }


    public void testLoadParentWhereChildIsNull() throws Exception {
        Lazy1to1Parent parent = null;
        
        Database db = _category.getDatabase();
        
        db.begin();
        parent = (Lazy1to1Parent) db.load(Lazy1to1Parent.class, new Integer (5));
        assertParent(parent, 5, "parent 5");
        assertNull(parent.getChild());
        db.commit();
        
        db.close();
    }

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    }


    public void testLoadParentWithAccess() throws Exception {
        Lazy1to1Parent parent = null;
        
        Database db = _category.getDatabase();
        
        db.begin();
        parent = (Lazy1to1Parent) db.load(Lazy1to1Parent.class, new Integer (1));
        db.commit();


        assertParent(parent, 1, "parent 1");
        Lazy1to1Child nature = parent.getChild();
        assertChild(nature, 1, "child 1");


        db.close();
    }

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    }


    public void testLoadParentReadOnlyWithAccessWithoutChange() throws Exception {
        Lazy1to1Parent parent = null;
        
        Database db = _category.getDatabase();
        
        db.begin();
        parent = (Lazy1to1Parent) db.load(Lazy1to1Parent.class, new Integer (1),
                                          AccessMode.ReadOnly);
        db.commit();


        assertParent(parent, 1, "parent 1");
        Lazy1to1Child nature = parent.getChild();
        assertChild(nature, 1, "child 1");


        // re-load to assert that nothing has changed
        db.begin();
        parent = (Lazy1to1Parent) db.load(Lazy1to1Parent.class, new Integer (1));
        db.commit();


        assertParent(parent, 1, "parent 1");
        assertChild(parent.getChild(), 1, "child 1");


        db.close();
    }

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    }


    public void testLoadParentReadOnlyWithAccessWithChange() throws Exception {
        Lazy1to1Parent parent = null;
        
        Database db = _category.getDatabase();
        
        db.begin();
        parent = (Lazy1to1Parent) db.load(Lazy1to1Parent.class, new Integer (1),
                                          AccessMode.ReadOnly);


        assertParent(parent, 1, "parent 1");
        Lazy1to1Child nature = parent.getChild();
        assertChild(nature, 1, "child 1");


        parent.getChild().setDescription("child changed");


        db.commit();


        // re-load to assert that nothing has changed
        db.begin();
        parent = (Lazy1to1Parent) db.load(Lazy1to1Parent.class, new Integer (1));
        db.rollback();


        assertParent(parent, 1, "parent 1");
        assertChild(parent.getChild(), 1, "child 1");


        db.close();
    }

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    }


    public void testLoadParentWithoutAccess() throws Exception {
        Lazy1to1Parent parent = null;
        
        Database db = _category.getDatabase();
        
        db.begin();
        parent = (Lazy1to1Parent) db.load(Lazy1to1Parent.class, new Integer (1));
        assertParent(parent, 1, "parent 1");
        db.commit();
        
        db.close();
    }

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    public void testLoadParentReadOnlyWithoutAccess() throws Exception {
        
        Lazy1to1Parent parent = null;
        
        Database db = _category.getDatabase();
        
        db.begin();
        parent = (Lazy1to1Parent) db.load(Lazy1to1Parent.class, new Integer (1),
                                          AccessMode.ReadOnly);
        assertParent(parent, 1, "parent 1");
        db.commit();
        
        db.close();
    }

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    public void testSerializeParentWithAccess () throws Exception {
        File file = new File ("serialized.out");
        ObjectOutputStream out = new ObjectOutputStream (new FileOutputStream (file));
        Lazy1to1Parent parent = null;
        
        Database db = _category.getDatabase();
        
        db.begin();
        parent = (Lazy1to1Parent) db.load(Lazy1to1Parent.class, new Integer (1));
        assertParent(parent, 1, "parent 1");
        assertChild(parent.getChild(), 1, "child 1");
        db.commit();
        
        out.writeObject (parent);
        out.close();


        ObjectInputStream in = new ObjectInputStream (new FileInputStream (file));
        Lazy1to1Parent accountDeserialized = (Lazy1to1Parent) in.readObject ();
        assertNotNull(accountDeserialized);
        assertEquals(1, accountDeserialized.getId().intValue());
        assertChild(accountDeserialized.getChild(), 1, "child 1");
        
        db.close();
    }

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        File file = new File("serialized.out");
        ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream (file));
        
        Lazy1to1Parent parent = null;
        
        Database db = _category.getDatabase();
        
        db.begin();
        parent = (Lazy1to1Parent) db.load(Lazy1to1Parent.class, new Integer (1));
        assertParent (parent, 1, "parent 1");
        db.commit();
        
        out.writeObject (parent);
        out.close();
        
        ObjectInputStream in = new ObjectInputStream(new FileInputStream (file));
        parent = (Lazy1to1Parent) in.readObject ();
        assertNotNull(parent);
        assertEquals(1, parent.getId().intValue());
        assertChild(parent.getChild(), 1, "child 1");
        
        db.close();
    }

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