| /* |
| * 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 org.apache.openjpa.jdbc.kernel.JDBCStore; |
| import org.apache.openjpa.jdbc.meta.ClassMapping; |
| import org.apache.openjpa.jdbc.meta.Joinable; |
| import org.apache.openjpa.jdbc.schema.Column; |
| import org.apache.openjpa.jdbc.schema.ForeignKey; |
| import org.apache.openjpa.jdbc.sql.Joins; |
| import org.apache.openjpa.jdbc.sql.Result; |
| import org.apache.openjpa.kernel.OpenJPAStateManager; |
| import org.apache.openjpa.util.Id; |
| import serp.util.Numbers; |
| |
| /** |
| * {@link Joinable} for the datastore identity column. |
| * |
| * @author Abe White |
| */ |
| class IdentityJoinable |
| implements Joinable { |
| |
| private final ClassMapping mapping; |
| |
| /** |
| * Constructor; supply datastore identity mapping. |
| */ |
| public IdentityJoinable(ClassMapping mapping) { |
| this.mapping = mapping; |
| } |
| |
| public int getFieldIndex() { |
| return -1; |
| } |
| |
| public Object getPrimaryKeyValue(Result res, Column[] cols, ForeignKey fk, |
| JDBCStore store, Joins joins) |
| throws SQLException { |
| Column col = cols[0]; |
| if (fk != null) |
| col = fk.getColumn(col); |
| long id = res.getLong(col); |
| if (id == 0 && res.wasNull()) |
| return null; |
| return Numbers.valueOf(id); |
| } |
| |
| public Column[] getColumns() { |
| return mapping.getPrimaryKeyColumns(); |
| } |
| |
| public Object getJoinValue(Object val, Column col, JDBCStore store) { |
| return val; |
| } |
| |
| public Object getJoinValue(OpenJPAStateManager sm, Column col, |
| JDBCStore store) { |
| Id id = (Id) sm.getObjectId(); |
| return (id == null) ? null : id.getIdObject(); |
| } |
| |
| public void setAutoAssignedValue(OpenJPAStateManager sm, JDBCStore store, |
| Column col, Object autogen) { |
| long id = ((Number) autogen).longValue(); |
| sm.setObjectId(store.newDataStoreId(id, (ClassMapping) |
| sm.getMetaData(), true)); |
| } |
| } |