Package org.apache.openjpa.jdbc.meta

Examples of org.apache.openjpa.jdbc.meta.FieldMapping

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    }

    public void testOplockFieldMapping() {
        ClassMapping cm = (ClassMapping) JPAFacadeHelper.getMetaData(
            emf, OptimisticLockInstance.class);
        FieldMapping fm = cm.getFieldMapping("oplock");
        assertEquals(1, fm.getColumns().length);
    }
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     * Load the given state manager with data from the result set. Only
     * mappings originally selected will be loaded.
     */
    private void load(ClassMapping mapping, OpenJPAStateManager sm,
        JDBCFetchConfiguration fetch, Result res) throws SQLException {
        FieldMapping eagerToMany = load(mapping, sm, fetch, res, null);
        if (eagerToMany != null)
            eagerToMany.loadEagerJoin(sm, this, fetch.traverseJDBC(eagerToMany),
                res);
        if (_active && _lm != null && res.isLocking())
            _lm.loadedForUpdate(sm);
    }
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        // create all our eager selects so that those fields are reserved
        // and cannot be reused during the actual eager select process,
        // preventing infinite recursion
        eager = Math.min(eager, fetch.getEagerFetchMode());
        FieldMapping eagerToMany = createEagerSelects(sel, mapping, sm, fields,
            fetch, eager);

        // select all base class mappings; do this after batching so that
        // the joins needed by these selects don't get in the WHERE clause
        // of the batched selects
        int seld = selectBaseMappings(sel, mapping, mapping, sm, fields,
            fetch, eager, eagerToMany, ident, joinedSupers);

        // select eager to-many relations last because during load they
        // advance the result set and could exhaust it, so no other mappings
        // can load afterwords
        if (eagerToMany != null)
            eagerToMany.selectEagerJoin(sel, sm, this,
                fetch.traverseJDBC(eagerToMany), eager);

        // optionally select subclass mappings
        if (subs == Select.SUBS_JOINABLE || subs == Select.SUBS_ANY_JOINABLE)
            selectSubclassMappings(sel, mapping, sm, fetch);
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        OpenJPAStateManager sm, BitSet fields, JDBCFetchConfiguration fetch,
        int eager) {
        if (mapping == null || eager == JDBCFetchConfiguration.EAGER_NONE)
            return null;

        FieldMapping eagerToMany = createEagerSelects(sel,
            mapping.getJoinablePCSuperclassMapping(), sm, fields, fetch, eager);

        FieldMapping[] fms = mapping.getDefinedFieldMappings();
        boolean inEagerJoin = sel.hasEagerJoin(false);
        int sels;
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        // add more update clauses as needed.
        boolean augmentUpdates = true;

        for (Iterator i = updateParams.entrySet().iterator(); i.hasNext();) {
            Map.Entry next = (Map.Entry) i.next();
            FieldMapping fmd = (FieldMapping) next.getKey();

            if (fmd.isVersion())
                augmentUpdates = false;

            Val val = (Val) next.getValue();

            Column col = fmd.getColumns()[0];
            sql.append(col.getName());
            sql.append(" = ");

            ExpState state = val.initialize(sel, ctx, 0);
            val.calculateValue(sel, ctx, state, null, null);
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        if (elem.getTypeCode() != JavaTypes.PC || elem.isEmbeddedPC()
            || !elem.getTypeMapping().isMapped())
            throw new MetaDataException(_loc.get("not-elem-relation", field));

        // check for named inverse
        FieldMapping mapped = field.getMappedByMapping();
        FieldMappingInfo finfo = field.getMappingInfo();
        ValueMappingInfo vinfo = elem.getValueInfo();
        boolean criteria = vinfo.getUseClassCriteria();
        if (mapped != null) {
            mapped.resolve(mapped.MODE_META | mapped.MODE_MAPPING);
            if (!(mapped.getStrategy() instanceof RelationFieldStrategy))
                throw new MetaDataException(_loc.get("not-inv-relation",
                    field, mapped));
            vinfo.assertNoSchemaComponents(elem, !adapt);
            elem.setForeignKey(mapped.getForeignKey
                (field.getDefiningMapping()));
            elem.setColumns(mapped.getDefiningMapping().
                getPrimaryKeyColumns());
            elem.setJoinDirection(ValueMapping.JOIN_EXPECTED_INVERSE);
            elem.setUseClassCriteria(criteria);

            field.setOrderColumn(finfo.getOrderColumn(field,
                mapped.getForeignKey().getTable(), adapt));
            field.setOrderColumnIO(finfo.getColumnIO());
            return;
        }

        // map inverse foreign key in related table
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        field.getElementMapping().getValueInfo().assertNoSchemaComponents
            (field.getElement(), !adapt);
        boolean criteria = field.getValueInfo().getUseClassCriteria();

        // check for named inverse
        FieldMapping mapped = field.getMappedByMapping();
        if (mapped != null) {
            field.getMappingInfo().assertNoSchemaComponents(field, !adapt);
            field.getValueInfo().assertNoSchemaComponents(field, !adapt);
            mapped.resolve(mapped.MODE_META | mapped.MODE_MAPPING);

            if (!mapped.isMapped() || mapped.isSerialized())
                throw new MetaDataException(_loc.get("mapped-by-unmapped",
                    field, mapped));

            if (mapped.getTypeCode() == JavaTypes.PC) {
                if (mapped.getJoinDirection() == mapped.JOIN_FORWARD) {
                    field.setJoinDirection(field.JOIN_INVERSE);
                    field.setColumns(mapped.getDefiningMapping().
                        getPrimaryKeyColumns());
                } else if (isTypeUnjoinedSubclass(mapped))
                    throw new MetaDataException(_loc.get
                        ("mapped-inverse-unjoined", field.getName(),
                            field.getDefiningMapping(), mapped));

                field.setForeignKey(mapped.getForeignKey
                    (field.getDefiningMapping()));
            } else if (mapped.getElement().getTypeCode() == JavaTypes.PC) {
                if (isTypeUnjoinedSubclass(mapped.getElementMapping()))
                    throw new MetaDataException(_loc.get
                        ("mapped-inverse-unjoined", field.getName(),
                            field.getDefiningMapping(), mapped));

                // warn the user about making the collection side the owner
                Log log = field.getRepository().getLog();
                if (log.isInfoEnabled())
                    log.info(_loc.get("coll-owner", field, mapped));
                field.setForeignKey(mapped.getElementMapping().
                    getForeignKey());
            } else
                throw new MetaDataException(_loc.get("not-inv-relation",
                    field, mapped));
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    protected boolean serializeAttributeOverride(FieldMetaData fmd,
        FieldMetaData orig) {
        if (orig == null || fmd == orig)
            return false;

        FieldMapping field = (FieldMapping) fmd;
        FieldMapping field2 = (FieldMapping) orig;
        if (field.getMappingInfo().hasSchemaComponents()
            || field2.getMappingInfo().hasSchemaComponents())
            return true;

        ValueMappingInfo info = field.getValueInfo();
        List<Column> cols = (List<Column>) info.getColumns();
        if (cols == null || cols.size() == 0)
            return false;
        ValueMappingInfo info2 = field2.getValueInfo();
        List<Column> cols2 = (List<Column>) info2.getColumns();
        if (cols2 == null || cols2.size() != cols.size())
            return true;
        if (cols.size() != 1)
            return true;
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    }

    @Override
    protected void serializeAttributeOverrideMappingContent(FieldMetaData fmd,
        FieldMetaData orig, AnnotationBuilder ab) {
        FieldMapping fm = (FieldMapping) fmd;
        serializeColumns(fm.getValueInfo(), ColType.COL, fm.getMappingInfo()
            .getTableName(), ab, fmd);
    }
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    }

    @Override
    protected PersistenceStrategy getStrategy(FieldMetaData fmd) {
        PersistenceStrategy strat = super.getStrategy(fmd);
        FieldMapping field = (FieldMapping) fmd;
        switch (strat) {
            case MANY_MANY:
                // we can differentiate a one-many by the fact that there is no
                // secondary table join, or the fk is unique
                if (field.getMappedBy() == null
                    && (field.getMappingInfo().getJoinDirection()
                    == MappingInfo.JOIN_NONE
                    || field.getElementMapping().getValueInfo().getUnique()
                    != null))
                    return PersistenceStrategy.ONE_MANY;
                break;
            case MANY_ONE:
                // inverse join cols or unique fk?
                if (field.getValueInfo().getJoinDirection()
                    == MappingInfo.JOIN_INVERSE
                    || field.getValueInfo().getUnique() != null)
                    return PersistenceStrategy.ONE_ONE;

                // scan for primary-key-join-column
                List<Column> cols = field.getValueInfo().getColumns();
                boolean pkJoin = cols != null && cols.size() > 0;
                for (int i = 0; pkJoin && i < cols.size(); i++)
                    pkJoin = cols.get(i).getFlag(Column.FLAG_PK_JOIN);
                if (pkJoin)
                    return PersistenceStrategy.ONE_ONE;
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