| /* |
| * 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.ArrayList; |
| import java.util.List; |
| |
| import org.apache.openjpa.jdbc.identifier.DBIdentifier; |
| import org.apache.openjpa.jdbc.kernel.JDBCStore; |
| import org.apache.openjpa.jdbc.meta.ClassMapping; |
| import org.apache.openjpa.jdbc.meta.FieldMapping; |
| 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.kernel.ObjectIdStateManager; |
| import org.apache.openjpa.kernel.OpenJPAStateManager; |
| import org.apache.openjpa.util.InternalException; |
| |
| /** |
| * Handler for embedded object id fields. |
| * |
| * @author Abe White |
| * @since 0.4.0 |
| */ |
| public class ObjectIdValueHandler |
| extends EmbedValueHandler { |
| |
| |
| private static final long serialVersionUID = 1L; |
| private Object[] _args = null; |
| |
| /** |
| * @deprecated |
| */ |
| @Deprecated |
| @Override |
| public Column[] map(ValueMapping vm, String name, ColumnIO io, |
| boolean adapt) { |
| DBDictionary dict = vm.getMappingRepository().getDBDictionary(); |
| DBIdentifier colName = DBIdentifier.newColumn(name, dict != null ? dict.delimitAll() : false); |
| return map(vm, colName, io, adapt); |
| } |
| |
| public Column[] map(ValueMapping vm, DBIdentifier name, ColumnIO io, |
| boolean adapt) { |
| List cols = new ArrayList(); |
| List args = new ArrayList(); |
| setMapsIdCol(vm); |
| super.map(vm, name, io, adapt, cols, args); |
| |
| vm.setColumns((Column[]) cols.toArray(new Column[cols.size()])); |
| _args = args.toArray(); |
| return vm.getColumns(); |
| } |
| |
| private void setMapsIdCol(ValueMapping vm) { |
| if (!(vm instanceof FieldMapping)) |
| return; |
| if (!((FieldMapping)vm).hasMapsIdCols()) |
| return; |
| ClassMapping embeddedMeta = (ClassMapping)((FieldMapping)vm).getValue().getEmbeddedMetaData(); |
| if (embeddedMeta == null) |
| return; |
| List mapsIdColList = ((FieldMapping)vm).getValueInfo().getMapsIdColumns(); |
| if (mapsIdColList.size() > 0 ) { |
| setMapsIdCols(mapsIdColList, embeddedMeta); |
| return; |
| } |
| |
| FieldMapping[] fmds = embeddedMeta.getFieldMappings(); |
| for (FieldMapping fmd : fmds) { |
| mapsIdColList = fmd.getValueInfo().getMapsIdColumns(); |
| if (mapsIdColList.size() == 0) |
| continue; |
| ClassMapping embeddedMeta1 = (ClassMapping) fmd.getEmbeddedMetaData(); |
| if (embeddedMeta1 != null) |
| setMapsIdCols(mapsIdColList, embeddedMeta1); |
| else |
| setMapsIdCols(mapsIdColList, fmd); |
| } |
| } |
| |
| private void setMapsIdCols(List cols, ClassMapping cm) { |
| for (Object col : cols) { |
| DBIdentifier refColName = ((Column) col).getTargetIdentifier(); |
| FieldMapping fm = getReferenceField(cm, refColName); |
| if (fm != null) { |
| List colList1 = new ArrayList(); |
| colList1.add(col); |
| fm.setMapsIdCols(true); |
| fm.getValueInfo().setMapsIdColumns(colList1); |
| } |
| } |
| } |
| |
| private void setMapsIdCols(List cols, FieldMapping fm) { |
| if (cols.size() == 1) { |
| fm.setMapsIdCols(true); |
| fm.getValueInfo().setMapsIdColumns(cols); |
| return; |
| } |
| |
| for (Object col : cols) { |
| DBIdentifier refColName = ((Column) col).getTargetIdentifier(); |
| if (isReferenceField(fm, refColName)) { |
| List colList1 = new ArrayList(); |
| colList1.add(col); |
| fm.setMapsIdCols(true); |
| fm.getValueInfo().setMapsIdColumns(colList1); |
| } |
| } |
| } |
| |
| private FieldMapping getReferenceField(ClassMapping cm, DBIdentifier refColName) { |
| FieldMapping[] fmds = cm.getFieldMappings(); |
| for (FieldMapping fmd : fmds) { |
| if (isReferenceField(fmd, refColName)) |
| return fmd; |
| } |
| return null; |
| } |
| |
| private boolean isReferenceField(FieldMapping fm, DBIdentifier refColName) { |
| List cols = fm.getValueInfo().getColumns(); |
| if (cols.size() == 0) { |
| if (fm.getName().equals(refColName.getName())) |
| return true; |
| } else { |
| if (((Column)cols.get(0)).getIdentifier().equals(refColName)) |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public Object getResultArgument(ValueMapping vm) { |
| return _args; |
| } |
| |
| @Override |
| public Object toDataStoreValue(ValueMapping vm, Object val, |
| JDBCStore store) { |
| OpenJPAStateManager sm = (val == null) ? null |
| : new ObjectIdStateManager(val, null, vm); |
| Column[] cols = vm.getColumns(); |
| Object rval = null; |
| if (cols.length > 1) |
| rval = new Object[cols.length]; |
| return super.toDataStoreValue(sm, vm, store, cols, rval, 0); |
| } |
| |
| @Override |
| public Object toObjectValue(ValueMapping vm, Object val) { |
| if (val == null) |
| return null; |
| |
| OpenJPAStateManager sm = new ObjectIdStateManager(null, null, vm); |
| try { |
| super.toObjectValue(sm, vm, val, null, null, vm.getColumns(), 0); |
| } catch (SQLException se) { |
| // shouldn't be possible |
| throw new InternalException(se); |
| } |
| return sm.getManagedInstance(); |
| } |
| } |