Examples of org.apache.ojb.broker.query.Criteria

org.apache.ojb.broker.query.Criteria
Persistent Criteria can be used to retrieve sets of objects based on their attributes Normally each attribute is ANDed together, an OR can be performed by creating a new PersistentCriteria and adding it.
Criteria are used, rather than a simple string, because they can be precompiled for efficiency. This code is based on stuff from COBRA - Java Object Persistence Layer Copyright (C) 1997, 1998 DB Harvey-George eMail: cobra@lowrent.org @author Jakob Braeuchi @version $Id: Criteria.java,v 1.45.2.5 2005/12/21 22:27:09 tomdz Exp $

    public PortletDefinitionComposite getPortletDefinitionByUniqueName( String name )
    {
        String appName = PortletRegistryHelper.parseAppName(name);
        String portletName = PortletRegistryHelper.parsePortletName(name);


        Criteria c = new Criteria();
        c.addEqualTo("app.name", appName);
        c.addEqualTo("name", portletName);


        PortletDefinitionComposite def = (PortletDefinitionComposite) getPersistenceBrokerTemplate().getObjectByQuery(
                QueryFactory.newQuery(PortletDefinitionImpl.class, c));
        if (def != null && def.getPortletApplicationDefinition() == null)
        {

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    {
        if (null == clients)
        {
                
            this.clients = getPersistenceBrokerTemplate().getCollectionByQuery(
                    QueryFactory.newQuery(clientClass, new Criteria()));
        }


        return this.clients.iterator();
    }

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     */
    public Collection getMediaTypesForMimeTypes(Iterator mimetypes)
    {
        //Find the MediaType by matching the Mimetype
        
        Criteria filter = new Criteria();


        Vector temp = new Vector();
        // Add Mimetypes to map and create query
        while (mimetypes.hasNext())
        {
            MimeType mt = (MimeType) mimetypes.next();


            // Add mimetype to query
            // Note: mimetypes is a member of MediaTypeImpl
            // criteria.addEqualTo("mimetypes.name", mt.getName());
            //stuff.add(new Integer(mt.getMimetypeId()));
            temp.add(mt.getName());
        }
        
        Collection co = null;
        if (temp.size() > 0)
        {
            filter.addIn("mimetypes.name", temp);
            QueryByCriteria query = QueryFactory.newQuery(mediaTypeClass, filter);
            co = getPersistenceBrokerTemplate().getCollectionByQuery(query);            
        }


        if (co == null || co.isEmpty())

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    /* (non-Javadoc)
     * @see org.apache.jetspeed.capabilities.CapabilityService#getMediaType(java.lang.String)
     */
    public MediaType getMediaType(String mediaType)
    {        
        Criteria filter = new Criteria();        
        filter.addEqualTo("name", mediaType);
        QueryByCriteria query = QueryFactory.newQuery(mediaTypeClass, filter);
        return (MediaType) getPersistenceBrokerTemplate().getObjectByQuery(query);                   
    }

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     */
    public MediaType getMediaTypeForMimeType(String mimeTypeName)
    {               
        //Find the MediaType by matching the Mimetype
                
        Criteria filter = new Criteria();       
        filter.addEqualTo("mimetypes.name", mimeTypeName);
        
        QueryByCriteria query = QueryFactory.newQuery(mediaTypeClass, filter);
        Collection mediaTypeCollection = getPersistenceBrokerTemplate().getCollectionByQuery(query);                    
        
        Iterator mtIterator = mediaTypeCollection.iterator();

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    public OjbExtent(Class pClazz, PersistenceBroker pBroker, PersistenceManagerInternal pPmi)
    {
      clazz = pClazz;
      broker = pBroker;
      pmi = pPmi;
        Criteria selectExtent = null;
        Query q = QueryFactory.newQuery(clazz, selectExtent);
        
        // the PB loads plain java objects
        Collection pojoInstances = broker.getCollectionByQuery(q);
        // To bring these instances under JDO management,

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    private Criteria getPkCriteriaForAllElements(PersistenceBroker brokerForClass)
    {
        try
        {
            Criteria crit = null;
            for (int i = 0; i < elements.size(); i++)
            {
                DListEntry entry = (DListEntry) elements.get(i);
                Object obj = entry.getRealSubject();
                ClassDescriptor cld = brokerForClass.getClassDescriptor(obj.getClass());


                FieldDescriptor[] pkFields = cld.getPkFields();
                ValueContainer[] pkValues = brokerForClass.serviceBrokerHelper().getKeyValues(cld, obj);


                Criteria criteria = new Criteria();
                for (int j = 0; j < pkFields.length; j++)
                {
                    FieldDescriptor fld = pkFields[j];
                    criteria.addEqualTo(fld.getPersistentField().getName(), pkValues[j].getValue());
                }


                if (crit == null)
                    crit = criteria;
                else

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        if (tx == null) throw new QueryInvalidException("Need running transaction to do query");


        OQLQuery predicateQuery = tx.getImplementation().newOQLQuery();
        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:
            allElementsCriteria.addAndCriteria(pCrit);


            Class clazz = null;
            try
            {
                clazz = this.getElementsExtentClass(broker);

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        while (e.hasMoreElements())
        {
            Object o = e.nextElement();
            if (o instanceof Criteria)
            {
                Criteria pc = (Criteria) o;
                flatten(pc, acc);
            }
            else
            {
                SelectionCriteria c = (SelectionCriteria) o;

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  public ExtentImpl(Class pClazz, OTMConnection conn, PersistenceManager pm, boolean subclasses)
  {
    m_clazz = pClazz;
    m_conn = conn;
    m_pm = pm;
        m_criteria = new Criteria();
  }

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