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/*
* 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
* @nojavadoc
* @since 0.4.0
*/
public class ObjectIdValueHandler
extends EmbedValueHandler {
private Object[] _args = null;
/**
* @deprecated
*/
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 (int i = 0; i < fmds.length; i++) {
mapsIdColList = fmds[i].getValueInfo().getMapsIdColumns();
if (mapsIdColList.size() == 0)
continue;
ClassMapping embeddedMeta1 = (ClassMapping)fmds[i].getEmbeddedMetaData();
if (embeddedMeta1 != null)
setMapsIdCols(mapsIdColList, embeddedMeta1);
else
setMapsIdCols(mapsIdColList, fmds[i]);
}
}
private void setMapsIdCols(List cols, ClassMapping cm) {
for (int i = 0; i < cols.size(); i++) {
DBIdentifier refColName = ((Column)cols.get(i)).getTargetIdentifier();
FieldMapping fm = getReferenceField(cm, refColName);
if (fm != null) {
List colList1 = new ArrayList();
colList1.add(cols.get(i));
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 (int i = 0; i < cols.size(); i++) {
DBIdentifier refColName = ((Column)cols.get(i)).getTargetIdentifier();
if (isReferenceField(fm, refColName)) {
List colList1 = new ArrayList();
colList1.add(cols.get(i));
fm.setMapsIdCols(true);
fm.getValueInfo().setMapsIdColumns(colList1);
}
}
}
private FieldMapping getReferenceField(ClassMapping cm, DBIdentifier refColName) {
FieldMapping[] fmds = cm.getFieldMappings();
for (int i = 0; i < fmds.length; i++) {
if (isReferenceField(fmds[i], refColName))
return fmds[i];
}
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;
}
public Object getResultArgument(ValueMapping vm) {
return _args;
}
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);
}
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();
}
}
