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.ecm.core.pubsub; 020 021import org.nuxeo.common.xmap.annotation.XNode; 022import org.nuxeo.common.xmap.annotation.XObject; 023import org.nuxeo.ecm.core.api.NuxeoException; 024 025/** 026 * Descriptor for a {@link PubSubProvider} implementation. 027 * 028 * @since 9.1 029 */ 030@XObject("provider") 031public class PubSubProviderDescriptor { 032 033 @XNode("@class") 034 public Class<? extends PubSubProvider> klass; 035 036 public PubSubProvider getInstance() { 037 // dynamic class check, the generics aren't enough 038 if (!PubSubProvider.class.isAssignableFrom(klass)) { 039 throw new NuxeoException("Class does not implement PubSubServiceProvider: " + klass.getName()); 040 } 041 try { 042 return klass.newInstance(); 043 } catch (ReflectiveOperationException e) { 044 throw new NuxeoException(e); 045 } 046 } 047 048}