/*
* Copyright (C) 2011 Red Hat, Inc. and/or its affiliates.
*
* Licensed 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.jboss.errai.enterprise.client.cdi;
import org.jboss.errai.bus.client.api.messaging.Message;
import org.jboss.errai.bus.client.api.messaging.MessageCallback;
import javax.enterprise.inject.Any;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
/**
* @author Christian Sadilek <csadilek@redhat.com>
* @author Mike Brock
*/
public abstract class AbstractCDIEventCallback<T> implements MessageCallback {
/**
* The qualifiers a message must contain to be propagated.
*/
protected final Set<String> qualifierSet = new HashSet<String>();
public Set<String> getQualifiers() {
return qualifierSet;
}
@SuppressWarnings("unchecked")
@Override
public final void callback(final Message message) {
Set<String> msgQualifiers = message.get(Set.class, CDIProtocol.Qualifiers);
if (msgQualifiers == null) {
msgQualifiers = Collections.emptySet();
}
if (message.hasPart(CDIProtocol.FromClient)) {
if (isDefault() || msgQualifiers.containsAll(qualifierSet)) {
fireEvent((T) message.get(Object.class, CDIProtocol.BeanReference));
}
}
else {
// Our server-side CDI integration module knows of all client-side event
// observers and sends a separate message specific to each matching
// observer.
if (msgQualifiers.equals(qualifierSet)) {
fireEvent((T) message.get(Object.class, CDIProtocol.BeanReference));
}
}
}
protected boolean isDefault() {
return qualifierSet.size() == 1 && qualifierSet.contains(Any.class.getName());
}
protected abstract void fireEvent(T event);
}