Examples of org.apache.openjpa.kernel.OpenJPAStateManager

org.apache.openjpa.kernel.OpenJPAStateManager
Interface implemented by OpenJPA state managers. Each state manager manages the state of a single persistence capable instance. The state manager is also responsible for all communications about the instance to the {@link StoreManager}. The fetchXXXField and storeXXXField methods can be used to get and set fields of the managed persistent object. Most back-end code, however, should use the similar fetchXXX and storeXXX methods in place of the field methods. These methods function just like the field methods, but also pass the value through the externalizer and factory the field may have. @author Abe White


        StoreContext ctx = store.getContext();
        // load primary key of owner entity
        Object owner = field.getDefiningMapping().getObjectId(store, res, 
            null, true, joins);
        OpenJPAStateManager em = ctx.embed(null, null, null, field);
        // set owner id
        ((StateManagerImpl) em).setOwner(owner);
        boolean needsLoad = loadFields(em, store, fetch, res);


        // After loading everything from result, load the rest of the
        // configured fields if anything is missing.
        if (needsLoad && 
            fetch.requiresFetch(field.getFieldMetaData()) == 
                JDBCFetchConfiguration.FETCH_LOAD) {
          em.load(fetch);
        }
        
        return em.getManagedInstance();
    }

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    public boolean contains(Object entity) {
        assertNotCloseInvoked();
        if (entity == null)
            return false;
        OpenJPAStateManager sm = _broker.getStateManager(entity);
        if (sm == null
            && !ImplHelper.isManagedType(getConfiguration(), entity.getClass()))
            throw new ArgumentException(_loc.get("not-entity",
                entity.getClass()), null, null, true);
        return sm != null && !sm.isDeleted();
    }

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        return !_broker.isCloseInvoked();
    }


    public void dirty(Object o, String field) {
        assertNotCloseInvoked();
        OpenJPAStateManager sm = _broker.getStateManager(o);
        try {
            if (sm != null)
                sm.dirty(field);
        } catch (Exception e) {
            throw PersistenceExceptions.toPersistenceException(e);
        }
    }

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    /**
     * Throw IllegalArgumentExceptionif if entity is not a valid entity or
     * if it is detached.
     */
    void assertValidAttchedEntity(String call, Object entity) {
        OpenJPAStateManager sm = _broker.getStateManager(entity);
        if (sm == null || !sm.isPersistent() || sm.isDetached() || (call.equals(REFRESH) && sm.isDeleted())) {
            throw new IllegalArgumentException(_loc.get("invalid_entity_argument", 
                call, entity == null ? "null" : Exceptions.toString(entity)).getMessage());
        }
    }

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                // get the StateManager of this toMany value
                // and find the value of the inverse mappedBy field (Customer)
                // for this toMacdny field
                PersistenceCapable pc = (PersistenceCapable)
                    ((Collection) coll).iterator().next();
                OpenJPAStateManager sm1 = (OpenJPAStateManager) pc.
                    pcGetStateManager();
                
                ClassMapping clm = ((ClassMapping) sm1.getMetaData());
                FieldMapping fm = (FieldMapping) clm.getField(
                    mappedByFieldMapping.getName());
                if (fm == mappedByFieldMapping)
                    res.setMappedByValue(sm1.fetchObject(fm.getIndex()));
            } else {
                res.setMappedByValue(null);
            }
        }        
    }

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        throws SQLException {
        Row row = field.getRow(sm, store, rm, Row.ACTION_INSERT);
        if (row == null)
            return;


        OpenJPAStateManager em = store.getContext().getStateManager
            (sm.fetchObject(field.getIndex()));
        insert(sm, em, store, rm, row);
    }

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     * @param row expected row for this embedded value
     */
    public void insert(OpenJPAStateManager owner, OpenJPAStateManager sm,
        JDBCStore store, RowManager rm, Row row)
        throws SQLException {
        OpenJPAStateManager em = sm;
        if (em == null)
            em = new NullEmbeddedStateManager(owner, field);
        rm = new EmbeddedRowManager(rm, row);
        FieldMapping[] fields = field.getEmbeddedMapping().getFieldMappings();
        for (int i = 0; i < fields.length; i++)

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            setNullIndicatorColumn(sm, row);
    }


    public void update(OpenJPAStateManager sm, JDBCStore store, RowManager rm)
        throws SQLException {
        OpenJPAStateManager em = store.getContext().getStateManager
            (sm.fetchObject(field.getIndex()));
        boolean newVal = em == null || em.getPCState() == PCState.ECOPY;


        Row row = null;
        if (newVal && field.getJoinForeignKey() != null
            && field.isJoinOuter()) {
            // if our record is in an outer-joined related table and we're not

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     * @param row expected row for this embedded value
     */
    public void update(OpenJPAStateManager owner, OpenJPAStateManager sm,
        JDBCStore store, RowManager rm, Row row)
        throws SQLException {
        OpenJPAStateManager em = sm;
        if (em == null)
            em = new NullEmbeddedStateManager(owner, field);
        rm = new EmbeddedRowManager(rm, row);
        FieldMapping[] fields = field.getEmbeddedMapping().getFieldMappings();
        for (int i = 0; i < fields.length; i++)
            if (em.getDirty().get(i)
                && !em.getFlushed().get(i)
                && !Boolean.TRUE.equals(fields[i].isCustomUpdate(em, store)))
                fields[i].update(em, store, rm);


        if (field.getColumnIO().isUpdatable(0, true))
            setNullIndicatorColumn(sm, row);

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            setNullIndicatorColumn(sm, row);
    }


    public void delete(OpenJPAStateManager sm, JDBCStore store, RowManager rm)
        throws SQLException {
        OpenJPAStateManager em = null;
        if (sm.getLoaded().get(field.getIndex()))
            em = store.getContext().getStateManager(sm.fetchObject
                (field.getIndex()));
        Row row = field.getRow(sm, store, rm, Row.ACTION_DELETE);
        delete(sm, em, store, rm, row);

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