/*
* Copyright 2009 JBoss, a divison Red Hat, Inc
*
* 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.rebind;
import org.jboss.errai.enterprise.client.cdi.api.CDI;
import org.jboss.errai.enterprise.client.cdi.api.ConversationContext;
import org.jboss.errai.ioc.client.api.CodeDecorator;
import org.jboss.errai.ioc.rebind.ioc.IOCDecoratorExtension;
import org.jboss.errai.ioc.rebind.ioc.InjectableInstance;
import org.jboss.errai.ioc.rebind.ioc.codegen.Statement;
import org.jboss.errai.ioc.rebind.ioc.codegen.meta.MetaClass;
import org.jboss.errai.ioc.rebind.ioc.codegen.meta.MetaClassFactory;
import org.jboss.errai.ioc.rebind.ioc.codegen.meta.MetaField;
import org.jboss.errai.ioc.rebind.ioc.codegen.meta.MetaParameterizedType;
import org.jboss.errai.ioc.rebind.ioc.codegen.util.Stmt;
import com.google.gwt.core.ext.typeinfo.JClassType;
import javax.enterprise.event.Event;
/**
* @author Heiko Braun <hbraun@redhat.com>
* @author Mike Brock <cbrock@redhat.com>
* @author Christian Sadilek <csadilek@redhat.com>
*/
@CodeDecorator
public class ConversationExtension extends IOCDecoratorExtension<ConversationContext> {
public ConversationExtension(Class<ConversationContext> decoratesWith) {
super(decoratesWith);
}
@Override
public Statement generateDecorator(InjectableInstance<ConversationContext> injectableInstance) {
final MetaField field = injectableInstance.getField();
final JClassType eventClassType = injectableInstance.getInjectionContext().getProcessingContext()
.loadClassType(Event.class);
if (!MetaClassFactory.get(eventClassType).isAssignableFrom(field.getType())) {
throw new RuntimeException("@ConversationContext should be used with type Event");
}
MetaParameterizedType type = field.getType().getParameterizedType();
if (type == null) {
throw new RuntimeException("Event<?> must be parameterized");
}
MetaClass typeParm = (MetaClass) type.getTypeParameters()[0];
String toSubject = CDI.getSubjectNameByType(typeParm.getFullyQualifiedName());
Statement statement = Stmt.nestedCall(injectableInstance.getValueStatement())
.invoke("registerConversation", Stmt.invokeStatic(CDI.class, "createConversation", toSubject));
return statement;
}
}