Examples of org.apache.openjpa.jdbc.schema.ForeignKey

org.apache.openjpa.jdbc.schema.ForeignKey
Represents a database foreign key; may be a logical key with no database representation. This class can also represent a partial key, aligning with {@link DatabaseMetaData}. @author Abe White


    public ForeignKey getJoinForeignKey(ClassMapping cls, Table local,
        Table foreign) {
        if (_joinFKAction == ForeignKey.ACTION_NONE)
            return null;
        ForeignKey fk = new ForeignKey();
        fk.setDeleteAction(_joinFKAction);
        fk.setDeferred(_defer);
        return fk;
    }

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    public ForeignKey getJoinForeignKey(FieldMapping fm, Table local,
        Table foreign) {
        if (_joinFKAction == ForeignKey.ACTION_NONE)
            return null;
        ForeignKey fk = new ForeignKey();
        fk.setDeleteAction(_joinFKAction);
        fk.setDeferred(_defer);
        return fk;
    }

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    public ForeignKey getForeignKey(ValueMapping vm, DBIdentifier name, Table local,
        Table foreign, boolean inverse) {
        if (_fkAction == ForeignKey.ACTION_NONE)
            return null;
        ForeignKey fk = new ForeignKey();
        fk.setDeleteAction(_fkAction);
        fk.setDeferred(_defer);
        return fk;
    }

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        if (field.getTypeMapping().isMapped()) {
            if (field.getMappedByIdValue() != null) 
                setMappedByIdColumns();            
             
            if (!field.isBiMTo1JT()) {
                ForeignKey fk = vinfo.getTypeJoin(field, field.getName(), true,
                    adapt);
                field.setForeignKey(fk);
            }
            field.setColumnIO(vinfo.getColumnIO());
            if (vinfo.getJoinDirection() == vinfo.JOIN_INVERSE)

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    }


    public void initialize() {
        field.setUsesIntermediate(true);


        ForeignKey fk = field.getForeignKey();
        if (fk == null)
            _fkOid = Boolean.TRUE;
        else if (field.getJoinDirection() != FieldMapping.JOIN_INVERSE)
            _fkOid = field.getTypeMapping().isForeignKeyObjectId(fk);
    }

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        if (!key.isEmbedded()) {
            if (keyObj instanceof PersistenceCapable) {
                OpenJPAStateManager keySm = RelationStrategies.
                    getStateManager(keyObj, store.getContext());
                // key is an entity
                ForeignKey fk = mapField.getKeyMapping().
                    getForeignKey();
                ColumnIO io = new ColumnIO();
                row.setForeignKey(fk, io, keySm);
            } 
        } else {

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            // if our foreign key has a delete action, we need to set the
            // related object so constraints can be evaluated
            OpenJPAStateManager rel = RelationStrategies.getStateManager
                (sm.fetchObjectField(field.getIndex()), store.getContext());
            if (rel != null) {
                ForeignKey fk = field.getForeignKey((ClassMapping)
                    rel.getMetaData());
                if (fk.getDeleteAction() == ForeignKey.ACTION_RESTRICT ||
                    fk.getDeleteAction() == ForeignKey.ACTION_CASCADE) {
                    Row row = field.getRow(sm, store, rm, Row.ACTION_DELETE);
                    row.setForeignKey(fk, null, rel);
                    // this is for bi-directional maps, the key and value of the
                    // map are stored in the table of the mapped-by entity  
                    setMapKey(sm, rel, store, row);

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    private void nullInverse(OpenJPAStateManager sm, RowManager rm)
        throws SQLException {
        if (field.getUseClassCriteria())
            return;


        ForeignKey fk = field.getForeignKey();
        ColumnIO io = field.getColumnIO();
        if (!io.isAnyUpdatable(fk, true))
            return;


        // null inverse if not already enforced by fk
        if (field.getIndependentTypeMappings().length != 1)
            throw RelationStrategies.uninversable(field);
        Row row = rm.getAllRows(fk.getTable(), Row.ACTION_UPDATE);
        row.setForeignKey(fk, io, null);
        row.whereForeignKey(fk, sm);
        rm.flushAllRows(row);
    }

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        JDBCStore store, RowManager rm)
        throws SQLException {
        if (rel == null)
            return;


        ForeignKey fk = field.getForeignKey();
        ColumnIO io = field.getColumnIO();


        int action;
        if (rel.isNew() && !rel.isFlushed()) {
            if (sm.isDeleted() || !io.isAnyInsertable(fk, false))

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            joins = join(joins, false);
            joins = setEmbeddedVariable(joins);
        }


        // and join into relation
        ForeignKey fk = field.getForeignKey(cls);
        if (!forceInner && field.getNullValue() != FieldMapping.NULL_EXCEPTION)
            return joins.outerJoinRelation(field.getName(), fk, field.
                getTypeMapping(), field.getSelectSubclasses(), inverse, false);
        return joins.joinRelation(field.getName(), fk, field.getTypeMapping(), 
            field.getSelectSubclasses(), inverse, false);

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