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com.ethlo.dachs.hibernate.HibernatePropertyChangeInterceptor Maven / Gradle / Ivy
package com.ethlo.dachs.hibernate;
import java.io.Serializable;
import java.lang.reflect.Field;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Objects;
import java.util.Set;
import java.util.function.Predicate;
import org.hibernate.EmptyInterceptor;
import org.hibernate.type.Type;
import org.springframework.util.ReflectionUtils;
import com.ethlo.dachs.EntityDataChangeImpl;
import com.ethlo.dachs.InternalEntityListener;
import com.ethlo.dachs.PropertyChange;
public class HibernatePropertyChangeInterceptor extends EmptyInterceptor
{
private static final long serialVersionUID = 4618098551981894684L;
private InternalEntityListener listener;
private Predicate entityFilter;
private Predicate fieldFilter;
public HibernatePropertyChangeInterceptor(InternalEntityListener listener)
{
this.listener = listener;
this.entityFilter = listener.getEntityFilter();
this.fieldFilter = listener.getFieldFilter();
}
@Override
public void onDelete(Object entity, Serializable id, Object[] state, String[] propertyNames, Type[] types)
{
final Collection> props = getProperties(entity, new Object[state.length], state, propertyNames, types);
listener.deleted(new EntityDataChangeImpl(id, entity, props));
}
@Override
public boolean onSave(Object entity, Serializable id, Object[] state, String[] propertyNames, Type[] types)
{
final Collection> props = getProperties(entity, state, new Object[state.length], propertyNames, types);
listener.created(new EntityDataChangeImpl(id, entity, props));
return false;
}
@Override
public boolean onFlushDirty(Object entity, Serializable id, Object[] currentState, Object[] previousState, String[] propertyNames, Type[] types)
{
final Collection> props = getProperties(entity, currentState, previousState, propertyNames, types);
listener.updated(new EntityDataChangeImpl(id, entity, props));
return false;
}
@SuppressWarnings(
{ "unchecked", "rawtypes" })
private Collection> getProperties(Object entity, Object[] currentState, Object[] previousState, String[] propertyNames, Type[] types)
{
final Set> retVal = new HashSet<>();
if (entityFilter.test(entity))
{
for (int i = 0; i < propertyNames.length; i++)
{
final String propertyName = propertyNames[i];
final Field field = ReflectionUtils.findField(entity.getClass(), propertyName);
if (this.fieldFilter.test(field) && !Objects.equals(previousState[i], currentState[i]))
{
final PropertyChange changed = new PropertyChange(propertyName, types[i].getReturnedClass(), previousState[i], currentState[i]);
retVal.add(changed);
}
}
}
return retVal;
}
public void postFlush(Iterator entities)
{
listener.postFlush(entities);
}
}
