package org.infinispan.notifications.cachelistener.filter;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Collections;
import java.util.Set;
import org.infinispan.commons.marshall.AbstractExternalizer;
import org.infinispan.factories.ComponentRegistry;
import org.infinispan.factories.annotations.Inject;
import org.infinispan.filter.KeyValueFilter;
import org.infinispan.marshall.core.Ids;
import org.infinispan.metadata.Metadata;
import org.infinispan.notifications.cachelistener.event.Event;
/**
* KeyValueFilter that is implemented by using the provided CacheEventFilter. The provided event type will always be
* one that is not retried, post and of type CREATE, The old value and old metadata in both pre and post events will
* be the data that was in the cache before the event occurs. The new value and new metadata in both pre and post
* events will be the data that is in the cache after the event occurs.
*
* @author wburns
* @since 7.0
*/
public class CacheEventFilterAsKeyValueFilter<K, V> implements KeyValueFilter<K, V> {
private static final EventType CREATE_EVENT = new EventType(false, false, Event.Type.CACHE_ENTRY_CREATED);
private final CacheEventFilter<K, V> filter;
public CacheEventFilterAsKeyValueFilter(CacheEventFilter<K, V> filter) {
this.filter = filter;
}
@Override
public boolean accept(K key, V value, Metadata metadata) {
return filter.accept(key, null, null, value, metadata, CREATE_EVENT);
}
@Inject
protected void injectDependencies(ComponentRegistry cr) {
cr.wireDependencies(filter);
}
public static class Externalizer extends AbstractExternalizer<CacheEventFilterAsKeyValueFilter> {
@Override
public Set<Class<? extends CacheEventFilterAsKeyValueFilter>> getTypeClasses() {
return Collections.singleton(CacheEventFilterAsKeyValueFilter.class);
}
@Override
public void writeObject(ObjectOutput output, CacheEventFilterAsKeyValueFilter object) throws IOException {
output.writeObject(object.filter);
}
@Override
public CacheEventFilterAsKeyValueFilter readObject(ObjectInput input) throws IOException, ClassNotFoundException {
return new CacheEventFilterAsKeyValueFilter((CacheEventFilter)input.readObject());
}
@Override
public Integer getId() {
return Ids.CACHE_EVENT_FILTER_AS_KEY_VALUE_FILTER;
}
}
}