org.jvnet.hk2.internal.TopicImpl Maven / Gradle / Ivy
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package org.jvnet.hk2.internal;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import org.glassfish.hk2.api.messaging.Topic;
import org.glassfish.hk2.api.messaging.TopicDistributionService;
import org.glassfish.hk2.utilities.NamedImpl;
/**
* @author jwells
*
*/
public class TopicImpl implements Topic {
private final ServiceLocatorImpl locator;
private final Type topicType;
private final Set requiredQualifiers;
/* package */ TopicImpl(ServiceLocatorImpl locator,
Type topicType,
Set requiredQualifiers) {
this.locator = locator;
this.topicType = topicType;
this.requiredQualifiers = Collections.unmodifiableSet(requiredQualifiers);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.messaging.Topic#publish(java.lang.Object)
*/
@Override
public void publish(T message) {
if (message == null) throw new IllegalArgumentException();
TopicDistributionService distributor = locator.getService(TopicDistributionService.class);
if (distributor == null) {
throw new IllegalStateException("There is no implementation of the TopicDistributionService to distribute the message");
}
distributor.distributeMessage(this, message);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.messaging.Topic#named(java.lang.String)
*/
@Override
public Topic named(String name) {
return qualifiedWith(new NamedImpl(name));
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.messaging.Topic#ofType(java.lang.reflect.Type)
*/
@Override
public Topic ofType(Type type) {
return new TopicImpl(locator, type, requiredQualifiers);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.messaging.Topic#qualifiedWith(java.lang.annotation.Annotation[])
*/
@Override
public Topic qualifiedWith(Annotation... qualifiers) {
HashSet moreAnnotations = new HashSet(requiredQualifiers);
for (Annotation qualifier : qualifiers) {
moreAnnotations.add(qualifier);
}
return new TopicImpl(locator, topicType, moreAnnotations);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.messaging.Topic#getTopicType()
*/
@Override
public Type getTopicType() {
return topicType;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.api.messaging.Topic#getTopicQualifiers()
*/
@Override
public Set getTopicQualifiers() {
return requiredQualifiers;
}
}