org.apache.openjpa.conf.MetaDataRepositoryValue Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
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*/
package org.apache.openjpa.conf;
import java.util.Map;
import org.apache.openjpa.lib.conf.Configuration;
import org.apache.openjpa.lib.conf.PluginValue;
import org.apache.openjpa.conf.CacheMarshallersValue;
import org.apache.openjpa.meta.MetaDataRepository;
/**
* A {@link PluginValue} that interacts with the {@link CacheMarshaller}
* to cache the metadata repository between executions.
*
* @since 1.1.0
*/
public class MetaDataRepositoryValue
extends PluginValue {
private static final String KEY = "MetaDataRepository";
public MetaDataRepositoryValue() {
super(KEY, false);
String[] aliases = new String[] {
"default",
MetaDataRepository.class.getName()
};
setAliases(aliases);
setDefault(aliases[0]);
setString(aliases[0]);
}
public Object instantiate(Class type, Configuration c, boolean fatal) {
MetaDataRepository repos = null;
OpenJPAConfiguration conf = (OpenJPAConfiguration) c;
Object[] os = (Object[]) CacheMarshallersValue.getMarshallerById(
conf, MetaDataCacheMaintenance.class.getName())
.load();
if (os != null) {
repos = (MetaDataRepository) os[0];
if (os[1] != null)
// It's a bit odd that we do this in MetaDataRepositoryValue.
// We need to serialize all the various bits of configuration
// together; maybe we can move the caching logic somewhere
// else?
conf.getQueryCompilationCacheInstance().putAll((Map) os[1]);
}
if (repos == null)
return super.instantiate(type, c, fatal);
else
return repos;
}
}