org.hibernate.envers.entities.mapper.id.AbstractCompositeIdMapper Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
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*/
package org.hibernate.envers.entities.mapper.id;
import java.util.Map;
import org.hibernate.envers.entities.PropertyData;
import org.hibernate.envers.exception.AuditException;
import org.hibernate.envers.tools.Tools;
import org.hibernate.internal.util.ReflectHelper;
/**
* @author Adam Warski (adam at warski dot org)
* @author Lukasz Antoniak (lukasz dot antoniak at gmail dot com)
*/
public abstract class AbstractCompositeIdMapper extends AbstractIdMapper implements SimpleIdMapperBuilder {
protected Map ids;
protected String compositeIdClass;
protected AbstractCompositeIdMapper(String compositeIdClass) {
ids = Tools.newLinkedHashMap();
this.compositeIdClass = compositeIdClass;
}
public void add(PropertyData propertyData) {
ids.put(propertyData, new SingleIdMapper(propertyData));
}
public Object mapToIdFromMap(Map data) {
if (data == null) {
return null;
}
Object ret;
try {
final Class clazz = ReflectHelper.classForName(compositeIdClass);
ret = ReflectHelper.getDefaultConstructor(clazz).newInstance();
} catch (Exception e) {
throw new AuditException(e);
}
for (SingleIdMapper mapper : ids.values()) {
if (!mapper.mapToEntityFromMap(ret, data)) {
return null;
}
}
return ret;
}
}