/*
* 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.enhance.PersistenceCapable;
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.RelationId;
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.OpenJPAStateManager;
import org.apache.openjpa.kernel.StoreContext;
import org.apache.openjpa.lib.util.Localizer;
import org.apache.openjpa.meta.JavaTypes;
import org.apache.openjpa.util.StoreException;
import org.apache.openjpa.util.ImplHelper;
/**
* Handler for unknown persistence-capable object fields that stores
* stringified oids.
*
* @nojavadoc
*/
public class UntypedPCValueHandler
extends AbstractValueHandler
implements RelationId {
private static final Localizer _loc = Localizer.forPackage
(UntypedPCValueHandler.class);
private static final UntypedPCValueHandler _instance =
new UntypedPCValueHandler();
/**
* Singleton instance.
*/
public static UntypedPCValueHandler getInstance() {
return _instance;
}
/**
* @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) {
Column col = new Column();
col.setIdentifier(name);
col.setJavaType(JavaTypes.STRING);
col.setRelationId(true);
return new Column[]{ col };
}
public boolean isVersionable(ValueMapping vm) {
return true;
}
public boolean objectValueRequiresLoad(ValueMapping vm) {
return true;
}
public Object toDataStoreValue(ValueMapping vm, Object val,
JDBCStore store) {
// in the past we've been lenient about being able to translate objects
// from other persistence contexts, so try to get sm directly from
// instance before asking our context
if (ImplHelper.isManageable(val)) {
PersistenceCapable pc = ImplHelper.toPersistenceCapable(val,
store.getConfiguration());
if (pc.pcGetStateManager() != null)
return pc.pcGetStateManager();
}
return RelationStrategies.getStateManager(val, store.getContext());
}
public Object toObjectValue(ValueMapping vm, Object val,
OpenJPAStateManager sm, JDBCStore store, JDBCFetchConfiguration fetch)
throws SQLException {
if (val == null)
return null;
String str = (String) val;
int idx = str.indexOf(':');
if (idx == -1)
throw new StoreException(_loc.get("oid-invalid", str, vm));
String clsName = str.substring(0, idx);
String oidStr = str.substring(idx + 1);
StoreContext ctx = store.getContext();
ClassLoader loader = store.getConfiguration().
getClassResolverInstance().getClassLoader(vm.getType(),
ctx.getClassLoader());
Class cls = null;
try {
cls = Class.forName(clsName, true, loader);
} catch (ClassNotFoundException cnfe) {
throw new StoreException(cnfe);
}
Object oid = ctx.newObjectId(cls, oidStr);
return store.find(oid, vm, fetch);
}
public Object toRelationDataStoreValue(OpenJPAStateManager sm, Column col) {
if (sm == null || sm.getObjectId() == null)
return null;
return sm.getMetaData().getDescribedType().getName() + ":"
+ sm.getObjectId().toString();
}
}