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

org.apache.ojb.broker.query.Query
represents Queries that can be used by the OJB PersistenceBroker to retrieve Objects from the underlying DB. Until now there are two implementations: 1. QueryByCriteria, represents SELECT * FROM ... WHERE ... queries 2. QueryByIdentity, uses Example objects or OIDs as templates for the db lookup there could additional implementations, e.g for user defined SQL For the Criteria API I reused code from the COBRA project, as you will see by their class comments. I removed all stuff that relies on knowlegde of the DataDictionary or MetaData layer. The Query and Criteria classes thus don't know how to build SQL statements, as in the COBRA original sources. I use the this classes as mere data-structures, that are processed by the OJB Accesslayer (SqlGenerator, JdbcAccess). This design will allow to reuse the org.apache.ojb.broker.query package in other projects without breaking any references. I hope this will be useful for someone. @author Thomas Mahler @version $Id: Query.java,v 1.17.2.3 2005/12/21 22:27:09 tomdz Exp $

    
    public SSOSite getSite(String siteUrl)
    {
        Criteria filter = new Criteria();
        filter.addEqualTo("siteURL", siteUrl);
        Query query = QueryFactory.newQuery(SSOSiteImpl.class, filter);
        SSOSite site = (SSOSite) getPersistenceBrokerTemplate().getObjectByQuery(query);
        if (site != null)
        {    
            this.mapSite.put(siteUrl, site);
        }

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    private InternalGroupPrincipal  getGroupPrincipals(String principalFullPath)
    {
        // Get to the backend to return the group that matches the full path
        Criteria filter = new Criteria();
        filter.addEqualTo("fullPath", principalFullPath);
        Query query = QueryFactory.newQuery(InternalGroupPrincipalImpl.class, filter);
        InternalGroupPrincipal group = (InternalGroupPrincipal) getPersistenceBrokerTemplate().getObjectByQuery(query);
        return group;       
    }

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        }


        Criteria c = new Criteria();
        c.addEqualTo("fullPath", fullPath);
        c.addEqualTo("nodeType", new Integer(nodeType));
        Query query = QueryFactory.newQuery(NodeImpl.class, c);


        Node nodeObj = (Node) getPersistenceBrokerTemplate().getObjectByQuery(query);
        if (null != nodeObj)
        {
          NodeImplProxy proxy = new NodeImplProxy(nodeObj);

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    {
        
        Criteria c = new Criteria();
        c.addEqualTo("fullPath", fullPath);
        c.addEqualTo("nodeType", new Integer(nodeType));
        Query query = QueryFactory.newQuery(NodeImpl.class, c);


        Node nodeObj = (Node) getPersistenceBrokerTemplate().getObjectByQuery(query);
        if (null != nodeObj)
        {
          proxy.setNode(nodeObj);

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            return (proxy.getNode() != null);
        }
        Criteria c = new Criteria();
        c.addEqualTo("fullPath", fullPath);
        c.addEqualTo("nodeType", new Integer(nodeType));
        Query query = QueryFactory.newQuery(NodeImpl.class, c);


        Node nodeObj = (Node) getPersistenceBrokerTemplate().getObjectByQuery(query);
        if (null != nodeObj)
        {
          NodeImplProxy proxy = new NodeImplProxy(nodeObj);

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        }
        // check to see if node exists in persistent store        
        Criteria c = new Criteria();
        c.addEqualTo("fullPath", fullPath);
        c.addEqualTo("nodeType", new Integer(nodeType));
        Query query = QueryFactory.newQuery(NodeImpl.class, c);
        Node nodeObj = (Node) getPersistenceBrokerTemplate().getObjectByQuery(query);
        if (null != nodeObj)
        {
            throw new NodeAlreadyExistsException("Node of type " + nodeType + " already exists at path " + fullPath);
        }

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            return resolveChildren(hit.getChildren());
        }


        Criteria c = new Criteria();
        c.addEqualTo("parentNodeId", new Long(parentNode.getNodeId()));
        Query query = QueryFactory.newQuery(NodeImpl.class, c);
        Collection children = getPersistenceBrokerTemplate().getCollectionByQuery(query);
        hit.setChildren(cacheChildren(children));
        // null or not
        return children;
    }

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        }
        if (propertyValue != null)
        {
            c.addEqualTo("nodeProperties.propertyValue", propertyValue);
        }
        Query query = QueryFactory.newQuery(NodeImpl.class, c);
        Collection children = getPersistenceBrokerTemplate().getCollectionByQuery(query);
        Collection proxied = new ArrayList();
        Iterator iter = children.iterator();
        while (iter.hasNext())
        {

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        int count = 0;
        NodeCache root = null;
        Criteria c = new Criteria();
        c.addLike("fullPath", path + "%");
        //c.addOrderBy("fullPath");
        Query query = QueryFactory.newQuery(NodeImpl.class, c);
        Collection result = getPersistenceBrokerTemplate().getCollectionByQuery(query);
        // TODO: ensure that we always get the first node back first
        if (result == null || result.isEmpty())
        {
            return count;

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        Identity oid = new Identity(main1, broker);
        MainObject newMain = (MainObject) broker.getObjectByIdentity(oid);
        assertNull(newMain);
        Criteria crit = new Criteria();
        crit.addLike("name", nameSub);
        Query q = QueryFactory.newQuery(SubObject.class, crit);
        Collection result = broker.getCollectionByQuery(q);
        assertEquals(0, result.size());
    }

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