Examples of org.odmg.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

        predicateQuery.create(oql);
        Query pQ = ((OQLQueryImpl) predicateQuery).getQuery();
        Criteria pCrit = pQ.getCriteria();


        PBCapsule handle = new PBCapsule(pbKey, TxManagerFactory.instance().getTransaction());
        DList result;


        try
        {
            PersistenceBroker broker = handle.getBroker();

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     * 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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     * 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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        Criteria pCrit = pQ.getCriteria();


        Transaction tx = TxManagerFactory.instance().getTransaction();
        if (tx == null) throw new QueryInvalidException("Need running transaction to do query");
        PBCapsule handle = new PBCapsule(pbKey, tx);
        DList result;
        try
        {
            PersistenceBroker broker = handle.getBroker();
            Criteria allElementsCriteria = this.getPkCriteriaForAllElements(broker);
            // join selection of elements with predicate criteria:

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     * 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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     * 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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        predicateQuery.create(oql);
        Query pQ = ((OQLQueryImpl) predicateQuery).getQuery();
        Criteria pCrit = pQ.getCriteria();


        PBCapsule handle = new PBCapsule(pbKey, tx);
        DList result;
        try
        {
            PersistenceBroker broker = handle.getBroker();
            Criteria allElementsCriteria = this.getPkCriteriaForAllElements(broker);
            // join selection of elements with predicate criteria:

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