| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.openjpa.conf; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.openjpa.lib.conf.Configuration; |
| import org.apache.openjpa.lib.conf.PluginListValue; |
| import org.apache.openjpa.lib.log.Log; |
| import org.apache.openjpa.lib.util.Localizer; |
| |
| /** |
| * A configuration value for handling and accessing cache marshallers. |
| * |
| * @since 1.1.0 |
| */ |
| public class CacheMarshallersValue |
| extends PluginListValue { |
| |
| private static final String KEY = "CacheMarshallers"; |
| private static final CacheMarshaller NO_OP_CACHE_MARSHALLER |
| = new NoOpCacheMarshaller(); |
| private static final Localizer _loc = |
| Localizer.forPackage(CacheMarshallersValue.class); |
| |
| private Configuration _conf; |
| private Map<String,CacheMarshaller> _marshallers; |
| private boolean _initialized; |
| |
| public CacheMarshallersValue(Configuration conf) { |
| super(KEY); |
| _conf = conf; |
| setAlias("default", CacheMarshallerImpl.class.getName()); |
| setAlias("none", null); |
| setDefault("none"); |
| setString("none"); |
| setScope(getClass()); |
| } |
| |
| @Override |
| public Object instantiate(Class<?> elemType, Configuration conf, |
| boolean fatal) { |
| CacheMarshaller[] ms = (CacheMarshaller[]) |
| super.instantiate(elemType, conf, fatal); |
| if (ms != null) { |
| _marshallers = new HashMap<>(); |
| for (CacheMarshaller m : ms) { |
| String mid = m.getId(); |
| if (mid != null) |
| _marshallers.put(mid, m); |
| } |
| } else { |
| _marshallers = null; |
| } |
| return ms; |
| } |
| |
| /** |
| * Return the {@link CacheMarshaller} to use for caching metadata of id |
| * <code>id</code>. If no marshaller exists for the id, returns |
| * {@link NoOpCacheMarshaller}. |
| */ |
| public CacheMarshaller getMarshallerById(String id) { |
| initialize(); |
| |
| CacheMarshaller cm = (CacheMarshaller) _marshallers.get(id); |
| if (cm == null) { |
| if (getLog().isTraceEnabled()) |
| getLog().trace(_loc.get("cache-marshaller-not-found", id)); |
| return NO_OP_CACHE_MARSHALLER; |
| } else { |
| if (getLog().isTraceEnabled()) |
| getLog().trace(_loc.get("cache-marshaller-found", id, |
| cm.getClass().getName())); |
| return cm; |
| } |
| } |
| |
| private Log getLog() { |
| return _conf.getConfigurationLog(); |
| } |
| |
| /** |
| * Return the {@link CacheMarshaller} to use for caching metadata of id |
| * <code>id</code>. If no marshaller exists for the id, returns |
| * {@link NoOpCacheMarshaller}. |
| */ |
| public static CacheMarshaller getMarshallerById(Configuration c, String id){ |
| CacheMarshallersValue v = |
| ((OpenJPAConfigurationImpl) c).cacheMarshallerPlugins; |
| return v.getMarshallerById(id); |
| } |
| |
| public Map<String,CacheMarshaller> getInstancesAsMap() { |
| return _marshallers; |
| } |
| |
| protected synchronized void initialize() { |
| if (!_initialized) { |
| instantiate(CacheMarshaller.class, _conf); |
| _initialized = true; |
| } |
| } |
| } |