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

org.apache.ojb.broker.query.QueryByCriteria
represents a search by criteria. "find all articles where article.price > 100" could be represented as: Criteria crit = new Criteria(); crit.addGreaterThan("price", new Double(100)); Query qry = new QueryByCriteria(Article.class, crit); The PersistenceBroker can retrieve Objects by Queries as follows: PersistenceBroker broker = PersistenceBrokerFactory.createPersistenceBroker(); Collection col = broker.getCollectionByQuery(qry); Creation date: (24.01.2001 21:45:46) @author Thomas Mahler @version $Id: QueryByCriteria.java,v 1.26.2.4 2005/12/21 22:27:09 tomdz Exp $

            Criteria criteria = new Criteria();


            criteria.addLessOrEqualThan("stock", new Integer(20));
            criteria.addGreaterOrEqualThan("price", new Double(100000.0));


            QueryByCriteria query = new QueryByCriteria(Product.class, criteria);


            results = broker.getCollectionByQuery(query);
        }
        catch (PersistenceBrokerException ex)
        {

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        try
        {
            broker = PersistenceBrokerFactory.defaultPersistenceBroker();


            QueryByCriteria query  = new QueryByCriteria(template);
            Product         result = (Product)broker.getObjectByQuery(query);


            if (result != null)
            {
                broker.beginTransaction();

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        try
        {
            broker = PersistenceBrokerFactory.defaultPersistenceBroker();


            QueryByCriteria query  = new QueryByCriteria(template);
            Product         result = (Product)broker.getObjectByQuery(query);


            if (result != null)
            {
                broker.beginTransaction();

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    {
        System.out.println("The list of available products:");


        // 1. build a query that select all objects of Class Product, without any further criteria
        // according to ODMG the Collection containing all instances of a persistent class is called "Extent"
        Query query = new QueryByCriteria(Product.class, null);


        try
        {
            // 2. ask the broker to retrieve the Extent collection
            Collection allProducts = broker.getCollectionByQuery(query);

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      {
      
          Criteria filter = new Criteria();   
          filter.addIn("remotePrincipals.fullPath", temp);
           
          QueryByCriteria query = QueryFactory.newQuery(SSOCookieImpl.class, filter);
          return getPersistenceBrokerTemplate().getCollectionByQuery(query);
      }
      else
      {
        return null;

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    {
     
      Criteria filter = new Criteria();       
        filter.addEqualTo("principals.fullPath", fullPath);
        
        QueryByCriteria query = QueryFactory.newQuery(SSOSiteImpl.class, filter);
        return getPersistenceBrokerTemplate().getCollectionByQuery(query); 
    }

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      //  Find the MediaType by matching the Mimetype
                
        Criteria filter = new Criteria();       
        filter.addEqualTo("siteURL", site);
        
        QueryByCriteria query = QueryFactory.newQuery(SSOSiteImpl.class, filter);
        Collection ssoSiteCollection = getPersistenceBrokerTemplate().getCollectionByQuery(query);                    
        
        if ( ssoSiteCollection != null && ssoSiteCollection.isEmpty() != true)
        {
          Iterator itSite = ssoSiteCollection.iterator();

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      SSOPrincipal principal = null;
      
    Criteria filter = new Criteria();       
      filter.addEqualTo("fullPath", fullPath);
      
      QueryByCriteria query = QueryFactory.newQuery(SSOPrincipalImpl.class, filter);
      Collection principals = getPersistenceBrokerTemplate().getCollectionByQuery(query);                    
      
      if ( principals != null && principals.isEmpty() != true)
      {
        Iterator itPrincipals = principals.iterator();

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      {
      
          Criteria filter = new Criteria();   
          filter.addIn("remotePrincipals.fullPath", temp);
           
          QueryByCriteria query = QueryFactory.newQuery(SSOCookieImpl.class, filter);
          return getPersistenceBrokerTemplate().getCollectionByQuery(query);
      }
      else
      {
        return null;

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    {
     
      Criteria filter = new Criteria();       
        filter.addEqualTo("principals.fullPath", fullPath);
        
        QueryByCriteria query = QueryFactory.newQuery(SSOSiteImpl.class, filter);
        return getPersistenceBrokerTemplate().getCollectionByQuery(query); 
    }

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