Examples of dList

com.sun.enterprise.util.collection.DList
A DList is an implementation of an unsynchronized doubly linked list. Unlike java.util.LinkedList, each node in the DList (DListNode) can be delinked in constant time. However, to do this the application must have the reference of the node to be delinked. DLists are exrtemely usefull if nodes are removed/inserted quite frequently. DList is used in the implementation of com.sun.enterprise.util.cache.AdaptiveCache.
net.aufdemrand.denizen.objects.dList
org.odmg.DList
The ODMG List collection. A DList collection is an ordered collection that provides efficient insertion and removal of elements at arbitrary positions in the list, but it also supports indexed access. The beginning index value is 0. When an element is added at a given position in the list, the index of all subsequent elements is increased by 1. Similarly, when an element is removed from the list, the index of all subsequent elements is decreased by 1.
All of the operations defined by the JavaSoft List interface are supported by an ODMG implementation of DList, the exception UnsupportedOperationException is not thrown when a call is made to any of the List methods. @author David Jordan (as Java Editor of the Object Data Management Group) @version ODMG 3.0

Examples of org.odmg.DList

    }


    protected int getObjectCount(Implementation ojb, Class target)
    {
        if(log.isDebugEnabled()) log.debug("getObjectCount was called");
        DList list;
        try
        {
            OQLQuery query = ojb.newOQLQuery();
            query.create("select allObjects from " + target.getName());
            list = (DList) query.execute();
            return list.size();
        }
        catch (QueryException e)
        {
            throw new EJBException("Query objects failed", e);
        }

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Examples of org.odmg.DList

        OQLQuery query = impl.newOQLQuery();


        query.create("select products from " + Product.class.getName() + " where name = $1");
        query.bind(name);


        DList   results = (DList)query.execute();
        Product product = (Product)results.iterator().next();


        tx.commit();
        return product;
    }

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Examples of org.odmg.DList

     * for the predicate, otherwise false.
     * @exception  org.odmg.QueryInvalidException  The query predicate is invalid.
     */
    public boolean existsElement(String predicate) throws org.odmg.QueryInvalidException
    {
        DList results = (DList) this.query(predicate);
        if (results == null || results.size() == 0)
            return false;
        else
            return true;
    }

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Examples of org.odmg.DList

            tx.begin();
            OQLQuery query = ojb.newOQLQuery();
            String sql = "select allArticles from " + PerformanceArticle.class.getName() +
                    " where articleName = \"" + PRE_NAME + threadName + "\"";
            query.create(sql);
            DList allProducts = (DList) query.execute();
            tx.commit();


            Iterator iter = allProducts.iterator();
            int fetchCount = 0;
            while (iter.hasNext())
            {
                fetchCount++;
                PerformanceArticle a = (PerformanceArticle) iter.next();

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Examples of org.odmg.DList

            tx.begin();
            OQLQuery query = ojb.newOQLQuery();
            String sql = "select allFarAways from " + FarAwayClass.class.getName() +
                    " where name = \"" + PRE_NAME + threadName + "\"";
            query.create(sql);
            DList allFarAways = (DList) query.execute();
            tx.commit();
            Iterator iter = allFarAways.iterator();
            int fetchCount = 0;
            while (iter.hasNext())
            {
                fetchCount++;
                FarAwayClass a = (FarAwayClass) iter.next();

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Examples of org.odmg.DList

        db.open(databaseName, Database.OPEN_READ_WRITE);


        Transaction tx = odmg.newTransaction();
        tx.begin();
        // create DList and bound by name
        DList list = odmg.newDList();
        db.bind(list, name);
        tx.commit();
        tx = odmg.newTransaction();
        tx.begin();
        Object obj = db.lookup(name);
        tx.commit();
        assertNotNull("binded DList not found", obj);


        tx = odmg.newTransaction();
        tx.begin();
        // add objects to list
        for (int i = 0; i < 5; i++)
        {
            DListObject a = createObject(name);
            list.add(a);
        }
        tx.commit();


        // check current list
        Iterator iter = list.iterator();
        while (iter.hasNext())
        {
            DListObject a = (DListObject) iter.next();
            assertNotNull(a);
        }


        tx = odmg.newTransaction();
        tx.begin();
        ((TransactionExt) odmg.currentTransaction()).getBroker().clearCache();


        // lookup list and check entries
        DList lookedUp = (DList) db.lookup(name);
        assertNotNull("binded DList not found", lookedUp);


        //System.out.println("sequence of items in lookedup list:");
        iter = lookedUp.iterator();
        Iterator iter1 = list.iterator();
        while (iter.hasNext())
        {
            DListObject a = (DListObject) iter.next();
            DListObject b = (DListObject) iter1.next();
            assertNotNull(a);
            assertNotNull(b);
            assertEquals(a.getId(), b.getId());
        }
        tx.commit();


        // add new entries to list
        tx.begin();
        for (int i = 0; i < 3; i++)
        {
            DListObject a = createObject(name + "_new_entry");
            list.add(a);
        }
        tx.commit();


        tx = odmg.newTransaction();
        tx.begin();
        ((TransactionExt) odmg.currentTransaction()).getBroker().clearCache();
        lookedUp = (DList) db.lookup(name);
        iter = lookedUp.iterator();
        iter1 = list.iterator();
        assertEquals("Wrong number of DListEntry found", 8, list.size());
        while (iter.hasNext())
        {
            DListObject a = (DListObject) iter.next();

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Examples of org.odmg.DList

        Implementation odmg = OJB.getInstance();
        Database db = odmg.newDatabase();
        //open database
        db.open(databaseName, Database.OPEN_READ_WRITE);
        // get DList and fill with objects
        DList list = odmg.newDList();
        Transaction tx = odmg.newTransaction();
        tx.begin();
        for (int i = 0; i < 5; i++)
        {
            DListObject a = createObject(name);
            list.add(a);
        }
        // bind the new list
        db.bind(list, name);
        tx.commit();


        tx = odmg.newTransaction();
        tx.begin();
        Object obj = db.lookup(name);
        tx.commit();
        assertNotNull("binded DList not found", obj);


        // iterate list
        Iterator iter = list.iterator();
        while (iter.hasNext())
        {
            DListObject a = (DListObject) iter.next();
            assertNotNull(a);
        }
        assertEquals(5, list.size());


        tx = odmg.newTransaction();
        tx.begin();
        ((TransactionExt) odmg.currentTransaction()).getBroker().clearCache();
        DList lookedUp = (DList) db.lookup(name);
        tx.commit();
        assertNotNull("binded DList not found", lookedUp);


        //System.out.println("sequence of items in lookedup list:");
        iter = lookedUp.iterator();
        Iterator iter1 = list.iterator();
        while (iter.hasNext())
        {
            DListObject a = (DListObject) iter.next();
            DListObject b = (DListObject) iter1.next();

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Examples of org.odmg.DList

        //open database
        db.open(databaseName, Database.OPEN_READ_WRITE);
        Transaction tx = odmg.newTransaction();


        tx.begin();
        DList list = odmg.newDList();
        // bind the list to the name:
        db.bind(list, name);


        for (int i = 0; i < 5; i++)
        {
            DListObject a = createObject(name);
            list.add(a);
        }
        assertEquals(5, list.size());
        tx.commit();


        // delete two items
        tx = odmg.newTransaction();
        tx.begin();
        ((HasBroker) odmg.currentTransaction()).getBroker().clearCache();
        DList lookedUp = (DList) db.lookup(name);
        assertNotNull("database lookup does not find the named DList", lookedUp);
        assertEquals("Wrong number of list entries", 5, lookedUp.size());
        lookedUp.remove(2);
        lookedUp.remove(1);
        tx.commit();


        // check if deletion was successful
        tx = odmg.newTransaction();
        tx.begin();
        ((HasBroker) odmg.currentTransaction()).getBroker().clearCache();
        lookedUp = (DList) db.lookup(name);
        tx.commit();


        assertEquals(3, lookedUp.size());
    }

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Examples of org.odmg.DList

        //open database
        db.open(databaseName, Database.OPEN_READ_WRITE);
        Transaction tx = odmg.newTransaction();


        tx.begin();
        DList list = odmg.newDList();
        db.bind(list, name);
        tx.commit();


        tx = odmg.newTransaction();
        tx.begin();
        for (int i = 0; i < 5; i++)
        {
            DListObject a = createObject(name);
            list.add(a);
        }


        list.add(2, createObject(name+"_pos2"));
        list.add(0, createObject(name+"_pos0"));
        list.add(7, createObject(name+"_pos7"));
        tx.commit();


        tx.begin();
        ((TransactionImpl) tx).getBroker().clearCache();
        // System.out.println("list: " + list);
        // System.out.println("lookup list: " + db.lookup(name));
        tx.commit();


        //System.out.println("sequence of items in list:");
        Iterator iter = list.iterator();
        DListObject a;
        while (iter.hasNext())
        {
            a = (DListObject) iter.next();
            assertNotNull(a);
            //System.out.print(a.getArticleId() + ", ");
        }




        tx = odmg.newTransaction();
        tx.begin();
        ((TransactionImpl) tx).getBroker().clearCache();
        DList lookedUp = (DList) db.lookup(name);
        // System.out.println("lookup list: " + lookedUp);
        assertNotNull("database lookup does not find DList", lookedUp);
        assertEquals(8, lookedUp.size());
        iter = lookedUp.iterator();
        while (iter.hasNext())
        {
            a = (DListObject) iter.next();
        }
        tx.commit();

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Examples of org.odmg.DList

     * for the predicate, otherwise false.
     * @exception  org.odmg.QueryInvalidException  The query predicate is invalid.
     */
    public boolean existsElement(String predicate) throws org.odmg.QueryInvalidException
    {
        DList results = (DList) this.query(predicate);
        if (results == null || results.size() == 0)
            return false;
        else
            return true;
    }

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