Examples of org.apache.ojb.broker.Identity

org.apache.ojb.broker.Identity
Represents the identity of an object.
It's composed of:
- class of the real object
- top-level class of the real object (could be an abstract class or interface or the class of the object itself), used to make an object unique across extent classes
- an array of all primary key value objects
- a flag which indicates whether this is a transient Identity (identity of a non-persistent, "new" object) or a persistent Identity (identity object of a persistent, "already written to datastore" object).
To create Identity objects it's strongly recommended to use the {@link IdentityFactory}, because in future releases of OJB the Identity constructors will be no longer reachable or forbidden to use.

NOTE: An Identity object must be unique accross extents. Means all objects with the same top-level class need unique PK values.
@see org.apache.ojb.broker.IdentityFactory @author Thomas Mahler @version $Id: Identity.java,v 1.36.2.14 2005/12/21 22:22:07 tomdz Exp $

            pg.setName("1");
            _conn.makePersistent(pg);


            tx.commit();


            Identity oid = _conn.getIdentity(pg);


            // get from the database
            tx = _kit.getTransaction(_conn);
            tx.begin();
            _conn.invalidate(oid);

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            pg.add(article);
            article.setProductGroup(pg);
            _conn.makePersistent(article);
            tx.commit();


            Identity aOid = _conn.getIdentity(article);
            Identity pgOid = _conn.getIdentity(pg);


            tx = _kit.getTransaction(_conn);
            tx.begin();
            pg = (ProductGroup) _conn.getObjectByIdentity(pgOid);
            pg.setName("2");

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            pg.setId(77777);
            pg.setName("1");
            _conn.makePersistent(pg);
            tx.commit();


            Identity pgOid = _conn.getIdentity(pg);


            tx = _kit.getTransaction(_conn);
            tx.begin();
            pg = (ProductGroup) _conn.getObjectByIdentity(pgOid);
            pg.setName("2");

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        Transaction tx = null;
        Transaction tx2 = null;
        OTMConnection conn2;
        ProductGroup pg = null;
        ProductGroup pg2 = null;
        Identity pOid = null;
        Identity pOid2 = null;


        conn2 = _kit.acquireConnection(PersistenceBrokerFactory.getDefaultKey());


        try
        {
            tx = _kit.getTransaction(_conn);
            tx.begin();
            pg = new ProductGroup();
            pg.setId(77777);
            pg.setName("1");
            pOid = _conn.getIdentity(pg);
            if (_conn.getObjectByIdentity(pOid) == null)
            {
                _conn.makePersistent(pg);
            }
            pg2 = new ProductGroup();
            pg2.setId(77778);
            pg2.setName("1");
            pOid2 = _conn.getIdentity(pg2);
            if (_conn.getObjectByIdentity(pOid2) == null)
            {
                _conn.makePersistent(pg2);
            }
            tx.commit();


            final Identity pgOid = _conn.getIdentity(pg);
            final Identity pgOid2 = _conn.getIdentity(pg2);




            final Transaction tx3 = _kit.getTransaction(_conn);
            tx3.begin();
            _conn.getObjectByIdentity(pgOid, LockType.WRITE_LOCK);

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        ProductGroup pg;
        Article article;
        Article article2;
        org.apache.ojb.broker.Person person;
        org.apache.ojb.broker.Project project;
        Identity aOid = null;
        Identity aOid2 = null;
        Identity pgOid = null;
        Identity prsOid = null;
        Identity prjOid = null;


        //perform transaction
        try
        {
            tx = _kit.getTransaction(_conn);

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            // cross check with PersistenceBroker lookup
            // 1. get OID
            Article example = new Article();
            example.setArticleId(60);
            Identity oid = new Identity(example, ((TransactionImpl) tx).getBroker());
            // 2. lookup object by OID
            PersistenceBroker broker = ((TransactionImpl) tx).getBroker();
            broker.clearCache();
            Article b = (Article) broker.getObjectByIdentity(oid);

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            //crosscheck with PersistenceBroker lookup
            // 1. get OID
            Article example = new Article();
            example.setArticleId(30);
            Identity oid = new Identity(example, ((TransactionImpl) tx).getBroker());


            // 2. lookup object by OID
            PersistenceBroker broker = ((TransactionImpl) tx).getBroker();
            broker.clearCache();
            Article b = (Article) broker.getObjectByIdentity(oid);

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            throws Exception
    {
        Master master = new Master();
        master.masterText = "Master_timestamp_" + timestamp;
        master.collDetailFKnoPK = new Vector();
        new Identity(master, ((HasBroker) tx).getBroker());
        for (int i = 0; i < countDetailObjects; i++)
        {
            DetailFKnoPK aDetail = new DetailFKnoPK();
            aDetail.detailText = "DetailFK*no*PK count " + i + ", associate master " + master.masterId + " timestamp_" + timestamp;
            aDetail.master = master;

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            throws Exception
    {
        Master master = new Master();
        master.masterText = "Master_timestamp_" + timestamp;
        master.collDetailFKinPK = new Vector();
        new Identity(master, ((HasBroker) tx).getBroker());
        for (int i = 0; i < countDetailObjects; i++)
        {
            DetailFKinPK aDetail = new DetailFKinPK();
            aDetail.detailText = "DetailFKinPK count " + i + ", associate master " + master.masterId + " timestamp_" + timestamp;
            aDetail.master = master;

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        database.makePersistent(em1);
        database.makePersistent(m1);
        tx.commit();


        tx.begin();
        Identity m1_oid = new Identity(m1, tx.getBroker());
        Identity ex1_oid = new Identity(ex1, tx.getBroker());
        Identity em1_oid = new Identity(em1, tx.getBroker());


        tx.getBroker().clearCache();


        Employee newEm1 = (Employee) tx.getBroker().getObjectByIdentity(em1_oid);
        Executive newEx1 = (Executive) tx.getBroker().getObjectByIdentity(ex1_oid);

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