Examples of org.apache.cayenne.map.DbEntity

org.apache.cayenne.map.DbEntity
A DbEntity is a mapping descriptor that defines a structure of a database table.

            List<ColumnDescriptor> columns,
            SelectQuery query) {


        final Set<ColumnTracker> attributes = new HashSet<ColumnTracker>();


        DbEntity table = getRootDbEntity();
        for (DbAttribute dba : table.getAttributes()) {
            appendColumn(columns, null, dba, attributes, null);
        }


        return columns;
    }

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        //stack should be reset, because all root table attributes go with "t0" table alias
        resetJoinStack();


        // add remaining needed attrs from DbEntity
        DbEntity table = getRootDbEntity();
        for (final DbAttribute dba : table.getPrimaryKeys()) {
            appendColumn(columns, null, dba, attributes, null);
        }


        // special handling of a disjoint query...


        if (query instanceof PrefetchSelectQuery) {


            // for each relationship path add PK of the target entity...
            for (String path : ((PrefetchSelectQuery) query).getResultPaths()) {


                Expression pathExp = oe.translateToDbPath(Expression.fromString(path));


                // add joins and find terminating element


                resetJoinStack();


                PathComponent<DbAttribute, DbRelationship> lastComponent = null;
                for (PathComponent<DbAttribute, DbRelationship> component : table
                        .resolvePath(pathExp, getPathAliases())) {


                    if (component.getRelationship() != null) {
                        dbRelationshipAdded(component.getRelationship(), component
                                .getJoinType(), null);
                    }


                    lastComponent = component;
                }


                // process terminating element
                if (lastComponent != null) {


                    DbRelationship relationship = lastComponent.getRelationship();


                    if (relationship != null) {


                        String labelPrefix = pathExp.toString().substring("db:".length());
                        DbEntity targetEntity = (DbEntity) relationship.getTargetEntity();


                        for (DbAttribute pk : targetEntity.getPrimaryKeys()) {


                            // note that we my select a source attribute, but label it as
                            // target for simplified snapshot processing
                            appendColumn(columns, null, pk, attributes, labelPrefix
                                    + '.'

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        Set<ColumnTracker> skipSet = new HashSet<ColumnTracker>();


        ClassDescriptor descriptor = queryMetadata.getClassDescriptor();
        ObjEntity oe = descriptor.getEntity();
        DbEntity dbEntity = oe.getDbEntity();
        for (ObjAttribute attribute : oe.getPrimaryKeys()) {


            // synthetic objattributes can't reliably lookup their DbAttribute, so do
            // it manually..
            DbAttribute dbAttribute = (DbAttribute) dbEntity.getAttribute(attribute
                    .getDbAttributeName());
            appendColumn(columns, attribute, dbAttribute, skipSet, null);
        }


        return columns;

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        if (descriptor == null) {
            throw new EJBQLException("Invalid identification variable: "
                    + expression.getText());
        }


        DbEntity table = descriptor.getEntity().getDbEntity();
        String alias = context.getTableAlias(expression.getText(), table
                .getFullyQualifiedName());


        Collection<DbAttribute> pks = table.getPrimaryKeys();


        if (pks.size() == 1) {
            DbAttribute pk = pks.iterator().next();
            context.append(' ').append(alias).append('.').append(pk.getName());
        }

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            loader.getConnection().close();
        }
    }


    private DbEntity getDbEntity(DataMap map, String name) {
        DbEntity de = map.getDbEntity(name);
        // sometimes table names get converted to lowercase
        if (de == null) {
            de = map.getDbEntity(name.toLowerCase());
        }

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        if (shouldDropTables) {
            ListIterator<DbEntity> it = dbEntitiesInInsertOrder
                    .listIterator(dbEntitiesInInsertOrder.size());
            while (it.hasPrevious()) {
                DbEntity ent = it.previous();
                list.addAll(dropTables.get(ent.getName()));
            }
        }


        if (shouldCreateTables) {
            for (final DbEntity ent : dbEntitiesInInsertOrder) {
                list.add(createTables.get(ent.getName()));
            }
        }


        if (shouldCreateFKConstraints) {
            for (final DbEntity ent : dbEntitiesInInsertOrder) {
                List<String> fks = createConstraints.get(ent.getName());
                list.addAll(fks);
            }
        }


        if (shouldDropPKSupport) {

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            // drop tables
            if (shouldDropTables) {
                ListIterator<DbEntity> it = dbEntitiesInInsertOrder
                        .listIterator(dbEntitiesInInsertOrder.size());
                while (it.hasPrevious()) {
                    DbEntity ent = it.previous();
                    for (String statement : dropTables.get(ent.getName())) {
                        safeExecute(connection, statement);
                    }
                }
            }


            // create tables
            List<String> createdTables = new ArrayList<String>();
            if (shouldCreateTables) {
                for (final DbEntity ent : dbEntitiesInInsertOrder) {


                    // only create missing tables


                    safeExecute(connection, createTables.get(ent.getName()));
                    createdTables.add(ent.getName());
                }
            }


            // create FK
            if (shouldCreateTables && shouldCreateFKConstraints) {
                for (DbEntity ent : dbEntitiesInInsertOrder) {


                    if (createdTables.contains(ent.getName())) {
                        List<String> fks = createConstraints.get(ent.getName());
                        for (String fk : fks) {
                            safeExecute(connection, fk);
                        }
                    }
                }

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        DbAdapter createdAdapter = factory.createAdapter(
                new DataNodeDescriptor(),
                dataSource);
        assertTrue(createdAdapter instanceof AutoAdapter);
        assertEquals("XXXXX", createdAdapter.createTable(new DbEntity("Test")));
    }

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                new MockDataSource());
        assertNotNull(createdAdapter);
        assertTrue(
                "Unexpected class: " + createdAdapter.getClass().getName(),
                createdAdapter instanceof AutoAdapter);
        assertEquals("CREATE TABLE Test ()", createdAdapter.createTable(new DbEntity(
                "Test")));
    }

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        if (objEntity == null) {
            throw new CayenneRuntimeException("Unmapped DataObject Class: "
                    + dataObjectClass.getName());
        }


        DbEntity dbEntity = objEntity.getDbEntity();
        if (dbEntity == null) {
            throw new CayenneRuntimeException("No DbEntity for ObjEntity: "
                    + objEntity.getName());
        }


        Collection pkAttributes = dbEntity.getPrimaryKeys();
        if (pkAttributes.size() != 1) {
            throw new CayenneRuntimeException("PK contains "
                    + pkAttributes.size()
                    + " columns, expected 1.");
        }

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