/* | |
* Copyright 1999-2012 Alibaba Group. | |
* | |
* Licensed 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 com.alibaba.dubbo.common.extension.factory; | |
import java.util.ArrayList; | |
import java.util.Collections; | |
import java.util.List; | |
import com.alibaba.dubbo.common.extension.Adaptive; | |
import com.alibaba.dubbo.common.extension.ExtensionFactory; | |
import com.alibaba.dubbo.common.extension.ExtensionLoader; | |
/** | |
* AdaptiveExtensionFactory | |
* | |
* @author william.liangf | |
*/ | |
@Adaptive | |
public class AdaptiveExtensionFactory implements ExtensionFactory { | |
private final List<ExtensionFactory> factories; | |
public AdaptiveExtensionFactory() { | |
ExtensionLoader<ExtensionFactory> loader = ExtensionLoader.getExtensionLoader(ExtensionFactory.class); | |
List<ExtensionFactory> list = new ArrayList<ExtensionFactory>(); | |
for (String name : loader.getSupportedExtensions()) { | |
list.add(loader.getExtension(name)); | |
} | |
factories = Collections.unmodifiableList(list); | |
} | |
public <T> T getExtension(Class<T> type, String name) { | |
for (ExtensionFactory factory : factories) { | |
T extension = factory.getExtension(type, name); | |
if (extension != null) { | |
return extension; | |
} | |
} | |
return null; | |
} | |
} |