Examples of org.odmg.DBag

org.odmg.DBag
This interface defines the operations associated with an ODMG bag collection. All of the operations defined by the JavaSoft Collection interface are supported by an ODMG implementation of DBag, the exception UnsupportedOperationException is not thrown when a call is made to any of the Collection methods. @author David Jordan (as Java Editor of the Object Data Management Group) @version ODMG 3.0

    {
        String name = "testDBag_" + System.currentTimeMillis();


        Transaction tx = odmg.newTransaction();
        tx.begin();
        DBag bag1 = odmg.newDBag();
        DBag bag2 = odmg.newDBag();
        DObject a, b, c, d, e;
        a = createObject(name);
        b = createObject(name);
        c = createObject(name);
        d = createObject(name);
        e = createObject(name);
        bag1.add(a);
        bag1.add(b);
        bag1.add(c);
        bag2.add(b);
        bag2.add(c);
        bag2.add(d);
        bag2.add(e);
        DBag bag3 = bag1.difference(bag2);
        assertEquals("should contain only 1 element", 1, bag3.size());


        bag3 = bag1.intersection(bag2);
        assertEquals("should contain two elements", 2, bag3.size());


        tx.commit();
    }

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    {
        String name = "testDBag_" + System.currentTimeMillis();


        Transaction tx = odmg.newTransaction();
        tx.begin();
        DBag bag1 = odmg.newDBag();
        DBag bag2 = odmg.newDBag();
        DObject a, b, c, d, e;
        a = createObject(name);
        b = createObject(name);
        c = createObject(name);
        d = createObject(name);
        e = createObject(name);
        bag1.add(a);
        bag1.add(b);
        bag1.add(c);
        bag2.add(b);
        bag2.add(c);
        bag2.add(d);
        bag2.add(e);
        DBag bag3 = bag1.difference(bag2);
        assertEquals("should contain only 1 element", 1, bag3.size());


        bag3 = bag1.intersection(bag2);
        assertEquals("should contain two elements", 2, bag3.size());


        tx.commit();
    }

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        Database db = odmg.newDatabase();
        //open database
        db.open(databaseName, Database.OPEN_READ_WRITE);
        Transaction tx = odmg.newTransaction();
        tx.begin();
        DBag bag1 = odmg.newDBag();
        DBag bag2 = odmg.newDBag();
        DListObject a, b, c, d, e;
        a = createObject(name);
        b = createObject(name);
        c = createObject(name);
        d = createObject(name);
        e = createObject(name);
        bag1.add(a);
        bag1.add(b);
        bag1.add(c);
        bag2.add(b);
        bag2.add(c);
        bag2.add(d);
        bag2.add(e);
        DBag bag3 = bag1.difference(bag2);
        assertEquals("should contain only 1 element", 1, bag3.size());


        bag3 = bag1.intersection(bag2);
        assertEquals("should contain two elements", 2, bag3.size());


        tx.commit();
    }

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Related Classes of org.odmg.DBag

org.apache.ojb.odmg.DListTest

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