| /* |
| * 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.openejb.util; |
| |
| import org.apache.openejb.OpenEJBRuntimeException; |
| import org.apache.xbean.recipe.ObjectRecipe; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Properties; |
| |
| public final class ListConfigurator { |
| private ListConfigurator() { |
| // no-op |
| } |
| |
| public static <T> List<T> getList(final Properties properties, final String key, final ClassLoader classloader, final Class<T> filter) { |
| if (properties == null) { |
| return null; |
| } |
| |
| final String features = properties.getProperty(key); |
| if (features == null) { |
| return null; |
| } |
| |
| final List<T> list = new ArrayList<T>(); |
| final String[] split = features.trim().split(","); |
| for (String feature : split) { |
| if (feature == null || feature.trim().isEmpty()) { |
| continue; |
| } |
| |
| final String prefix = key + "." + feature + "."; |
| final ObjectRecipe recipe = new ObjectRecipe(feature); |
| for (Map.Entry<Object, Object> entry : properties.entrySet()) { |
| final String current = entry.getKey().toString(); |
| if (current.startsWith(prefix)) { |
| final String property = current.substring(prefix.length()); |
| recipe.setProperty(property, entry.getValue()); |
| } |
| } |
| |
| final Object instance = recipe.create(classloader); |
| if (!filter.isInstance(instance)) { |
| throw new OpenEJBRuntimeException(feature + " is not an abstract feature"); |
| } |
| list.add(filter.cast(instance)); |
| } |
| |
| if (list.isEmpty()) { |
| return null; |
| } |
| return list; |
| } |
| } |
| |