001/* 002 * (C) Copyright 2018 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 * pierre 018 */ 019package org.nuxeo.runtime.api.login; 020 021import org.apache.logging.log4j.LogManager; 022import org.apache.logging.log4j.Logger; 023import org.nuxeo.runtime.model.DefaultComponent; 024import org.nuxeo.runtime.model.Descriptor; 025 026/** 027 * LoginAs component. 028 * <p> 029 * It allows to contribute implementation to which login is delegated. 030 * 031 * @since 10.3 032 */ 033public class LoginAsComponent extends DefaultComponent { 034 035 private static final Logger log = LogManager.getLogger(LoginAsComponent.class); 036 037 private static final String XP_IMPL = "implementation"; 038 039 @SuppressWarnings("unchecked") 040 @Override 041 public <T> T getAdapter(Class<T> adapter) { 042 if (adapter == LoginAs.class) { 043 return (T) getLoginAs(); 044 } 045 return null; 046 } 047 048 protected LoginAs getLoginAs() { 049 LoginAsDescriptor descriptor = getDescriptor(XP_IMPL, Descriptor.UNIQUE_DESCRIPTOR_ID); 050 if (descriptor == null) { 051 return null; 052 } 053 try { 054 return descriptor.klass.getDeclaredConstructor().newInstance(); 055 } catch (ReflectiveOperationException e) { 056 log.error("Unable to instantiate LoginAs implementation", e); 057 return null; 058 } 059 } 060 061}