Examples of QueryByIdentity

org.apache.ojb.broker.query.QueryByIdentity
Represents a search by identity. "find the article with id 7" could be represented as:

Article example = new Article(); example.setId(7); Query qry = new QueryByIdentity(example);
The PersistenceBroker can retrieve Objects by examples as follows:

PersistenceBroker broker = PersistenceBrokerFactory.createPersistenceBroker(); Collection col = broker.getObjectByQuery(qry);
This Class can also handle working with OJB Identity objects: "find the article with Identity xyz" could be represnted as

Article example = new Article(); example.setId(7); Identity xyz = broker.serviceIdentity().buildIdentity(example); Query qry = new QueryByIdentity(xyz); Collection col = broker.getObjectByQuery(qry);
But in this case a smarter solution will be

Identity xyz = broker.serviceIdentity().buildIdentity(Article.class, new Integer(7)); Collection col = broker.getObjectByIdentity(xyz); @author Thomas Mahler @version $Id: QueryByIdentity.java,v 1.9.2.3 2005/12/21 22:27:09 tomdz Exp $

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

    {
        try
        {
            ProductGroup samplePG = new ProductGroup();
            samplePG.setId(1);
            InterfaceProductGroup pg = (InterfaceProductGroup) broker.getObjectByQuery(new QueryByIdentity(samplePG));
            Iterator iter = pg.getAllArticles().iterator();
            InterfaceArticle a1 = null;
            InterfaceArticle a2 = null;
            a1 = (InterfaceArticle) iter.next();
            while (iter.hasNext())

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

                //broker.getClassDescriptor(Article.class).getFieldDescriptorByName("articleId"));


        // now check if is really unique !
        Article tmp = new Article();
        tmp.setArticleId(uid);
        Query q = new QueryByIdentity(tmp);
        InterfaceArticle result = (InterfaceArticle) broker.getObjectByQuery(q);


        assertNull("" + uid + " should be unique", result);


        //System.out.println("next free UID for InterfaceArticle : " + uid);

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

        GUID guid = new GUID();


        PersistenceBroker broker1 = PersistenceBrokerFactory.defaultPersistenceBroker();
        broker1.beginTransaction();


        Article a1 = (Article) broker1.getObjectByQuery(new QueryByIdentity(oid));
        String originalName = a1.getArticleName();
        a1.setArticleName(guid.toString());


// start a second transaction
        PersistenceBroker broker2 = PersistenceBrokerFactory.defaultPersistenceBroker();
        broker2.beginTransaction();


        Article a2 = (Article) broker2.getObjectByQuery(new QueryByIdentity(oid));


        assertEquals(guid.toString(), a1.getArticleName());
        assertEquals(originalName, a2.getArticleName());
        assertNotSame(a1, a2);

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

        broker.beginTransaction();
        broker.store(samplePG);
        broker.commitTransaction();
        broker.clearCache();


        InterfaceProductGroup pg = (InterfaceProductGroup) broker.getObjectByQuery(new QueryByIdentity(samplePG));
        List list = pg.getAllArticles();
        assertNotNull(list);
        assertEquals(3, list.size());
        NumberRange range = new NumberRange(a1_.getArticleId(), a3_.getArticleId());
        InterfaceArticle a1 = null;

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

        tx.abort();


        tx = (TransactionExt) odmg.newTransaction();
        tx.begin();
        broker = tx.getBroker();
        QueryByIdentity query2 = new QueryByIdentity(obj);
        Object result = broker.getObjectByQuery(query2);
        tx.commit();


        assertNull("We should not find objects from aborted tx", result);
    }

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

        tx.abort();


        tx = (TransactionExt) odmg.newTransaction();
        tx.begin();
        broker = tx.getBroker();
        QueryByIdentity query2 = new QueryByIdentity(obj);
        Object result = broker.getObjectByQuery(query2);
        tx.commit();


        assertNull("We should not find objects from aborted tx", result);
    }

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

        else
        {
            // if query is Identity based transform it to a criteria based query first
            if (query instanceof QueryByIdentity)
            {
                QueryByIdentity qbi = (QueryByIdentity) query;
                Object oid = qbi.getExampleObject();
                // make sure it's an Identity
                if (!(oid instanceof Identity))
                {
                    oid = serviceIdentity().buildIdentity(oid);
                }

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

        // 1. build an example object with matching primary key values:
        Product example = new Product();
        example.setId(id);


        // 2. build a QueryByIdentity from this sample instance:
        Query query = new QueryByIdentity(example);
        try
        {
            // 3. start broker transaction
            broker.beginTransaction();

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

        // we do this by a query by example (QBE):
        // 1. build an example object with matching primary key values:
        Product example = new Product();
        example.setId(id);
        // 2. build a QueryByIdentity from this sample instance:
        Query query = new QueryByIdentity(example);
        try
        {
            // start broker transaction
            broker.beginTransaction();
            // lookup the product specified by the QBE

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

        GUID guid = new GUID();


        PersistenceBroker broker1 = PersistenceBrokerFactory.defaultPersistenceBroker();
        broker1.beginTransaction();


        Article a1 = (Article) broker1.getObjectByQuery(new QueryByIdentity(oid));
        String originalName = a1.getArticleName();
        a1.setArticleName(guid.toString());


// start a second transaction
        PersistenceBroker broker2 = PersistenceBrokerFactory.defaultPersistenceBroker();
        broker2.beginTransaction();


        Article a2 = (Article) broker2.getObjectByQuery(new QueryByIdentity(oid));


        assertEquals(guid.toString(), a1.getArticleName());
        assertEquals(originalName, a2.getArticleName());
        assertNotSame(a1, a2);

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