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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;
import org.apache.openjpa.lib.util.Localizer;
import org.apache.openjpa.util.MetaDataException;
/**
* Attempts to install using the given mapping information. If that
* fails, clears the mapping information and constructs new mappings.
*
* @author Abe White
* @since 0.4.0
*/
public class RefreshStrategyInstaller
extends StrategyInstaller {
private static final Localizer _loc = Localizer.forPackage
(RefreshStrategyInstaller.class);
/**
* Constructor; supply configuration.
*/
public RefreshStrategyInstaller(MappingRepository repos) {
super(repos);
}
public boolean isAdapting() {
return true;
}
public void installStrategy(ClassMapping cls) {
ClassStrategy strat = repos.namedStrategy(cls);
if (strat == null)
strat = repos.defaultStrategy(cls, true);
try {
cls.setStrategy(strat, Boolean.TRUE);
} catch (MetaDataException mde) {
// if this is a custom strategy, don't attempt to override
if (isCustomStrategy(strat))
throw mde;
repos.getLog().warn(_loc.get("fatal-change", cls,
mde.getMessage()));
cls.clearMapping();
cls.setStrategy(repos.defaultStrategy(cls, true), Boolean.TRUE);
}
cls.setSourceMode(cls.MODE_MAPPING, true);
}
public void installStrategy(FieldMapping field) {
FieldStrategy strategy = repos.namedStrategy(field, true);
if (strategy == null)
strategy = repos.defaultStrategy(field, true, true);
try {
field.setStrategy(strategy, Boolean.TRUE);
} catch (MetaDataException mde) {
// if this is a custom strategy, don't override
if (isCustomStrategy(strategy))
throw mde;
repos.getLog().warn(_loc.get("fatal-change", field,
mde.getMessage()));
field.clearMapping();
field.setHandler(null);
field.getKeyMapping().setHandler(null);
field.getElementMapping().setHandler(null);
field.setStrategy(repos.defaultStrategy(field, true, true),
Boolean.TRUE);
}
}
public void installStrategy(Version version) {
VersionStrategy strat = repos.namedStrategy(version);
if (strat == null)
strat = repos.defaultStrategy(version, true);
try {
version.setStrategy(strat, Boolean.TRUE);
} catch (MetaDataException mde) {
// if this is a custom strategy, don't attempt to override
if (isCustomStrategy(strat))
throw mde;
repos.getLog().warn(_loc.get("fatal-change", version,
mde.getMessage()));
version.clearMapping();
version.setStrategy(repos.defaultStrategy(version, true),
Boolean.TRUE);
}
}
public void installStrategy(Discriminator discrim) {
DiscriminatorStrategy strat = repos.namedStrategy(discrim);
if (strat == null)
strat = repos.defaultStrategy(discrim, true);
try {
discrim.setStrategy(strat, Boolean.TRUE);
} catch (MetaDataException mde) {
// if this is a custom strategy, don't attempt to override
if (isCustomStrategy(strat))
throw mde;
repos.getLog().warn(_loc.get("fatal-change", discrim,
mde.getMessage()));
// retain old discriminator version, if any
String val = discrim.getMappingInfo().getValue();
discrim.clearMapping();
discrim.getMappingInfo().setValue(val);
discrim.setStrategy(repos.defaultStrategy(discrim, true),
Boolean.TRUE);
}
}
/**
* Return true if the given strategy is not a built-in type.
*/
private static boolean isCustomStrategy(Strategy strat) {
return !strat.getClass().getName().startsWith("org.apache.openjpa.");
}
}
