001/* 002 * (C) Copyright 2017 Nuxeo (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Florent Guillaume 018 */ 019package org.nuxeo.runtime.pubsub; 020 021import org.nuxeo.common.xmap.annotation.XNode; 022import org.nuxeo.common.xmap.annotation.XObject; 023 024/** 025 * Descriptor for a {@link PubSubProvider} implementation. 026 * 027 * @since 9.1 028 */ 029@XObject("provider") 030public class PubSubProviderDescriptor { 031 032 @XNode("@class") 033 public Class<? extends PubSubProvider> klass; 034 035 public PubSubProvider getInstance() { 036 // dynamic class check, the generics aren't enough 037 if (!PubSubProvider.class.isAssignableFrom(klass)) { 038 throw new RuntimeException("Class does not implement PubSubServiceProvider: " + klass.getName()); 039 } 040 try { 041 return klass.newInstance(); 042 } catch (ReflectiveOperationException e) { 043 throw new RuntimeException(e); 044 } 045 } 046 047}