001/* 002 * (C) Copyright 2014 Nuxeo SA (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl-2.1.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * Contributors: 015 * Nicolas Chapurlat <nchapurlat@nuxeo.com> 016 */ 017 018package org.nuxeo.ecm.core.schema.types.resolver; 019 020import java.util.HashMap; 021import java.util.Map; 022 023import org.apache.commons.logging.Log; 024import org.apache.commons.logging.LogFactory; 025import org.nuxeo.runtime.model.ComponentContext; 026import org.nuxeo.runtime.model.ComponentInstance; 027import org.nuxeo.runtime.model.DefaultComponent; 028 029/** 030 * Simple Map base implementation. 031 * 032 * @since 7.1 033 */ 034public class ObjectResolverServiceImpl extends DefaultComponent implements ObjectResolverService { 035 036 private static final Log log = LogFactory.getLog(ObjectResolverServiceImpl.class); 037 038 private Map<String, Class<? extends ObjectResolver>> resolvers; 039 040 @Override 041 public void activate(ComponentContext context) { 042 super.activate(context); 043 resolvers = new HashMap<String, Class<? extends ObjectResolver>>(); 044 } 045 046 @Override 047 public void registerContribution(Object contribution, String extensionPoint, ComponentInstance contributor) { 048 if (extensionPoint.equals("resolvers")) { 049 ObjectResolverDescriptor erd = (ObjectResolverDescriptor) contribution; 050 resolvers.put(erd.getType(), erd.getResolver()); 051 } 052 } 053 054 @Override 055 public void unregisterContribution(Object contribution, String extensionPoint, ComponentInstance contributor) { 056 if (extensionPoint.equals("resolvers")) { 057 ObjectResolverDescriptor erd = (ObjectResolverDescriptor) contribution; 058 resolvers.remove(erd.getType()); 059 } 060 } 061 062 @Override 063 public ObjectResolver getResolver(String type, Map<String, String> parameters) { 064 Class<? extends ObjectResolver> resolverClass = resolvers.get(type); 065 if (resolverClass == null) { 066 return null; 067 } 068 ObjectResolver resolver = null; 069 try { 070 resolver = resolverClass.newInstance(); 071 } catch (InstantiationException | IllegalAccessException e) { 072 log.warn(String.format("Unable to instanciate %s - missing public constructor with no param", 073 resolverClass.getCanonicalName())); 074 return null; 075 } 076 try { 077 resolver.configure(parameters != null ? parameters : new HashMap<String, String>()); 078 } catch (IllegalArgumentException e) { 079 log.info(String.format("Unable to configure %s with parameters %s", resolverClass.getCanonicalName(), 080 parameters.toString())); 081 return null; 082 } 083 return resolver; 084 } 085 086}