Examples of org.apache.ojb.broker.util.BrokerHelper

org.apache.ojb.broker.util.BrokerHelper
This class contains helper methods primarily used by the {@link org.apache.ojb.broker.PersistenceBroker}implementation (e.g. contains methods to assign the the values of 'autoincrement' fields).
Furthermore it was used to introduce new features related to {@link org.apache.ojb.broker.PersistenceBroker} - thesenew features and services (if they stand the test of time) will be moved to separate services in future. @author Armin Waibel @version $Id: BrokerHelper.java,v 1.57.2.23 2005/12/21 22:27:47 tomdz Exp $

        this.pbf = pbf;
        this.pbKey = key;
        /*
        be careful when changing initializing order
        */
        brokerHelper = new BrokerHelper(this);
        connectionManager = ConnectionManagerFactory.getInstance().createConnectionManager(this);
        /*
        TODO: find better solution
        MaterializationCache is a interim solution help to solve the problem of not full
        materialized object reads by concurrent threads and will be replaced when

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     */
    protected Query[] buildMtoNImplementorQueries(Collection owners, Collection children)
    {
        ClassDescriptor cld = getOwnerClassDescriptor();
        Class topLevelClass = getBroker().getTopLevelClass(cld.getClassOfObject());
        BrokerHelper helper = getBroker().serviceBrokerHelper();
        Collection queries = new ArrayList(owners.size());
        Collection idsSubset = new HashSet(owners.size());
        Object[] fkValues;
        Object owner;
        Identity id;


        Iterator iter = owners.iterator();
        while (iter.hasNext())
        {
            owner = iter.next();
            fkValues = helper.extractValueArray(helper.getKeyValues(cld, owner));
            id = new Identity(null, topLevelClass, fkValues);
            idsSubset.add(id);
            if (idsSubset.size() == pkLimit)
            {
                queries.add(buildMtoNImplementorQuery(idsSubset));

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                m_objectsTopLevelClass = targetBroker.getTopLevelClass(objectToIdentify.getClass());
                m_objectsRealClass = objectToIdentify.getClass();


                // BRJ: definitely do NOT convertToSql
                // conversion is done when binding the sql-statement
                BrokerHelper helper = targetBroker.serviceBrokerHelper();
                m_pkValues = helper.extractValueArray( helper.getKeyValues(cld, objectToIdentify, false) );
            }


            checkForPrimaryKeys();
        }
        catch (Exception e)

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        this.pbf = pbf;
        this.pbKey = key;
        /*
        be careful when changing initializing order
        */
        brokerHelper = new BrokerHelper(this);
        connectionManager = ConnectionManagerFactory.getInstance().createConnectionManager(this);
        /*
        TODO: find better solution
        InternalCache is a interim solution help to solve the problem of not full
        materialized object reads by concurrent threads and will be replaced when

View Full Code Here

     */
    protected Query[] buildMtoNImplementorQueries(Collection owners, Collection children)
    {
        ClassDescriptor cld = getOwnerClassDescriptor();
        Class topLevelClass = getBroker().getTopLevelClass(cld.getClassOfObject());
        BrokerHelper helper = getBroker().serviceBrokerHelper();
        Collection queries = new ArrayList(owners.size());
        Collection idsSubset = new HashSet(owners.size());
        Object[] fkValues;
        Object owner;
        Identity id;


        Iterator iter = owners.iterator();
        while (iter.hasNext())
        {
            owner = iter.next();
            fkValues = helper.extractValueArray(helper.getKeyValues(cld, owner));
            id = new Identity(null, topLevelClass, fkValues);
            idsSubset.add(id);
            if (idsSubset.size() == pkLimit)
            {
                queries.add(buildMtoNImplementorQuery(idsSubset));

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                    m_objectsTopLevelClass = targetBroker.getTopLevelClass(objectToIdentify.getClass());
                    m_objectsRealClass = objectToIdentify.getClass();


                    // BRJ: definitely do NOT convertToSql
                    // conversion is done when binding the sql-statement
                    final BrokerHelper helper = targetBroker.serviceBrokerHelper();
                    final ValueContainer[] pkValues = helper.getKeyValues(cld, objectToIdentify, false);
                    if (pkValues == null || pkValues.length == 0)
                    {
                        throw createException("Can't extract PK value fields", objectToIdentify, null);
                    }
                    m_pkValues = helper.extractValueArray(pkValues);
                }
            }


            checkForPrimaryKeys(objectToIdentify);
        }

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     */
    protected Query[] buildPrefetchQueries(Collection owners, Collection children)
    {
        ClassDescriptor cld = getOwnerClassDescriptor();
        Class topLevelClass = getBroker().getTopLevelClass(cld.getClassOfObject());
        BrokerHelper helper = getBroker().serviceBrokerHelper();
        Collection queries = new ArrayList(owners.size());
        Collection idsSubset = new HashSet(owners.size());
        Object[] fkValues;
        Object owner;
        Identity id;


        Iterator iter = owners.iterator();
        while (iter.hasNext())
        {
            owner = iter.next();
            fkValues = helper.extractValueArray(helper.getKeyValues(cld, owner));
            id = new Identity(null, topLevelClass, fkValues);
            idsSubset.add(id);
            if (idsSubset.size() == pkLimit)
            {
                queries.add(buildPrefetchQuery(idsSubset));

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org.apache.commons.collections.iterators.ArrayIterator

org.apache.ojb.broker.accesslayer.CollectionPrefetcher

org.apache.ojb.broker.accesslayer.MtoNCollectionPrefetcher

org.apache.ojb.broker.accesslayer.sql.SqlExistStatement

org.apache.ojb.broker.accesslayer.StatementManagerIF

org.apache.ojb.broker.core.IdentityFactoryImpl

org.apache.ojb.broker.core.PersistenceBrokerImpl

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