| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.openjpa.jdbc.meta.strats; |
| |
| import java.sql.SQLException; |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.openjpa.jdbc.identifier.DBIdentifier; |
| import org.apache.openjpa.jdbc.kernel.JDBCFetchConfiguration; |
| import org.apache.openjpa.jdbc.kernel.JDBCStore; |
| import org.apache.openjpa.jdbc.meta.ClassMapping; |
| import org.apache.openjpa.jdbc.meta.ValueHandler; |
| import org.apache.openjpa.jdbc.meta.ValueMapping; |
| import org.apache.openjpa.jdbc.schema.Column; |
| import org.apache.openjpa.jdbc.schema.ColumnIO; |
| import org.apache.openjpa.jdbc.sql.DBDictionary; |
| import org.apache.openjpa.jdbc.sql.Joins; |
| import org.apache.openjpa.jdbc.sql.Result; |
| import org.apache.openjpa.jdbc.sql.Row; |
| import org.apache.openjpa.jdbc.sql.RowManager; |
| import org.apache.openjpa.jdbc.sql.Select; |
| import org.apache.openjpa.kernel.OpenJPAStateManager; |
| import org.apache.openjpa.lib.util.Localizer; |
| import org.apache.openjpa.util.ChangeTracker; |
| import org.apache.openjpa.util.MetaDataException; |
| import org.apache.openjpa.util.Proxies; |
| import org.apache.openjpa.util.Proxy; |
| |
| /** |
| * Mapping for a map of keys and values both controlled by |
| * {@link ValueHandler}s. |
| * |
| * @author Abe White |
| * @since 0.4.0, 1.1.0 |
| */ |
| public class HandlerHandlerMapTableFieldStrategy |
| extends MapTableFieldStrategy { |
| |
| |
| private static final long serialVersionUID = 1L; |
| |
| private static final Localizer _loc = Localizer.forPackage |
| (HandlerHandlerMapTableFieldStrategy.class); |
| |
| private Column[] _kcols = null; |
| private ColumnIO _kio = null; |
| private boolean _kload = false; |
| private Column[] _vcols = null; |
| private ColumnIO _vio = null; |
| private boolean _vload = false; |
| |
| @Override |
| public Column[] getKeyColumns(ClassMapping cls) { |
| return _kcols; |
| } |
| |
| @Override |
| public Column[] getValueColumns(ClassMapping cls) { |
| return _vcols; |
| } |
| |
| @Override |
| public void selectKey(Select sel, ClassMapping cls, OpenJPAStateManager sm, |
| JDBCStore store, JDBCFetchConfiguration fetch, Joins joins) { |
| sel.select(_kcols, joins); |
| } |
| |
| @Override |
| public void selectValue(Select sel, ClassMapping cls, |
| OpenJPAStateManager sm, |
| JDBCStore store, JDBCFetchConfiguration fetch, Joins joins) { |
| sel.select(_vcols, joins); |
| } |
| |
| @Override |
| public Result[] getResults(OpenJPAStateManager sm, JDBCStore store, |
| JDBCFetchConfiguration fetch, int eagerMode, Joins[] joins, boolean lrs) |
| throws SQLException { |
| Select sel = store.getSQLFactory().newSelect(); |
| sel.setLRS(lrs); |
| sel.select(_kcols); |
| sel.select(_vcols); |
| sel.whereForeignKey(field.getJoinForeignKey(), sm.getObjectId(), |
| field.getDefiningMapping(), store); |
| Result res = sel.execute(store, fetch); |
| return new Result[]{ res, res }; |
| } |
| |
| @Override |
| public Object loadKey(OpenJPAStateManager sm, JDBCStore store, |
| JDBCFetchConfiguration fetch, Result res, Joins joins) |
| throws SQLException { |
| return HandlerStrategies.loadObject(field.getKeyMapping(), |
| sm, store, fetch, res, joins, _kcols, _kload); |
| } |
| |
| @Override |
| public Object loadValue(OpenJPAStateManager sm, JDBCStore store, |
| JDBCFetchConfiguration fetch, Result res, Joins joins) |
| throws SQLException { |
| return HandlerStrategies.loadObject(field.getElementMapping(), |
| sm, store, fetch, res, joins, _vcols, _vload); |
| } |
| |
| @Override |
| public void map(boolean adapt) { |
| super.map(adapt); |
| |
| ValueMapping key = field.getKeyMapping(); |
| if (key.getHandler() == null) |
| throw new MetaDataException(_loc.get("no-handler", key)); |
| ValueMapping val = field.getElementMapping(); |
| if (val.getHandler() == null) |
| throw new MetaDataException(_loc.get("no-handler", val)); |
| assertNotMappedBy(); |
| |
| field.mapJoin(adapt, true); |
| _kio = new ColumnIO(); |
| List columns = key.getValueInfo().getColumns(); |
| DBDictionary dict = field.getMappingRepository().getDBDictionary(); |
| DBIdentifier colName = dict.getValidColumnName(DBIdentifier.newColumn("key"), field.getTable()); |
| _kcols = HandlerStrategies.map(key, colName.getName(), _kio, adapt); |
| |
| _vio = new ColumnIO(); |
| _vcols = HandlerStrategies.map(val, "value", _vio, adapt); |
| field.mapPrimaryKey(adapt); |
| } |
| |
| @Override |
| public void initialize() { |
| _kload = field.getKeyMapping().getHandler(). |
| objectValueRequiresLoad(field.getKeyMapping()); |
| _vload = field.getElementMapping().getHandler(). |
| objectValueRequiresLoad(field.getElementMapping()); |
| } |
| |
| @Override |
| public void insert(OpenJPAStateManager sm, JDBCStore store, RowManager rm) |
| throws SQLException { |
| insert(sm, store, rm, (Map) sm.fetchObject(field.getIndex())); |
| } |
| |
| private void insert(OpenJPAStateManager sm, JDBCStore store, RowManager rm, |
| Map map) |
| throws SQLException { |
| if (map == null || map.isEmpty()) |
| return; |
| |
| Row row = rm.getSecondaryRow(field.getTable(), Row.ACTION_INSERT); |
| row.setForeignKey(field.getJoinForeignKey(), field.getJoinColumnIO(), |
| sm); |
| |
| ValueMapping key = field.getKeyMapping(); |
| ValueMapping val = field.getElementMapping(); |
| Map.Entry entry; |
| for (Object o : map.entrySet()) { |
| entry = (Map.Entry) o; |
| HandlerStrategies.set(key, entry.getKey(), store, row, _kcols, |
| _kio, true); |
| HandlerStrategies.set(val, entry.getValue(), store, row, _vcols, |
| _vio, true); |
| rm.flushSecondaryRow(row); |
| } |
| } |
| |
| @Override |
| public void update(OpenJPAStateManager sm, JDBCStore store, RowManager rm) |
| throws SQLException { |
| Map map = (Map) sm.fetchObject(field.getIndex()); |
| ChangeTracker ct = null; |
| if (map instanceof Proxy) { |
| Proxy proxy = (Proxy) map; |
| if (Proxies.isOwner(proxy, sm, field.getIndex())) |
| ct = proxy.getChangeTracker(); |
| } |
| |
| // if no fine-grained change tracking then just delete and reinsert |
| if (ct == null || !ct.isTracking()) { |
| delete(sm, store, rm); |
| insert(sm, store, rm, map); |
| return; |
| } |
| |
| // delete the removes |
| ValueMapping key = field.getKeyMapping(); |
| Collection rem = ct.getRemoved(); |
| if (!rem.isEmpty()) { |
| Row delRow = rm.getSecondaryRow(field.getTable(), |
| Row.ACTION_DELETE); |
| delRow.whereForeignKey(field.getJoinForeignKey(), sm); |
| for (Object o : rem) { |
| HandlerStrategies.where(key, o, store, delRow, |
| _kcols); |
| rm.flushSecondaryRow(delRow); |
| } |
| } |
| |
| // insert the adds |
| ValueMapping val = field.getElementMapping(); |
| Collection add = ct.getAdded(); |
| Object mkey; |
| if (!add.isEmpty()) { |
| Row addRow = rm.getSecondaryRow(field.getTable(), |
| Row.ACTION_INSERT); |
| addRow.setForeignKey(field.getJoinForeignKey(), |
| field.getJoinColumnIO(), sm); |
| |
| for (Object o : add) { |
| mkey = o; |
| HandlerStrategies.set(key, mkey, store, addRow, _kcols, |
| _kio, true); |
| HandlerStrategies.set(val, map.get(mkey), store, addRow, |
| _vcols, _vio, true); |
| rm.flushSecondaryRow(addRow); |
| } |
| } |
| |
| // update the changes |
| Collection change = ct.getChanged(); |
| if (!change.isEmpty()) { |
| Row changeRow = rm.getSecondaryRow(field.getTable(), |
| Row.ACTION_UPDATE); |
| changeRow.whereForeignKey(field.getJoinForeignKey(), sm); |
| |
| for (Object o : change) { |
| mkey = o; |
| HandlerStrategies.where(key, mkey, store, changeRow, _kcols); |
| HandlerStrategies.set(val, map.get(mkey), store, changeRow, |
| _vcols, _vio, true); |
| rm.flushSecondaryRow(changeRow); |
| } |
| } |
| } |
| |
| @Override |
| public Object toDataStoreValue(Object val, JDBCStore store) { |
| return HandlerStrategies.toDataStoreValue(field.getElementMapping(), |
| val, _vcols, store); |
| } |
| |
| @Override |
| public Object toKeyDataStoreValue(Object val, JDBCStore store) { |
| return HandlerStrategies.toDataStoreValue(field.getKeyMapping(), val, |
| _kcols, store); |
| } |
| |
| @Override |
| public Joins joinRelation(Joins joins, boolean forceOuter, |
| boolean traverse) { |
| if (traverse) |
| HandlerStrategies.assertJoinable(field.getElementMapping()); |
| return joins; |
| } |
| |
| @Override |
| public Joins joinKeyRelation(Joins joins, boolean forceOuter, |
| boolean traverse) { |
| if (traverse) |
| HandlerStrategies.assertJoinable(field.getKeyMapping()); |
| return joins; |
| } |
| } |