/*
* Copyright 2008-2009 the original author or authors.
*
* 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 net.hasor.core.provider;
import net.hasor.core.AppContext;
import net.hasor.core.AppContextAware;
import net.hasor.core.Hasor;
import net.hasor.core.Provider;
/**
* 用法：Hasor.autoAware(env,new ClassAwareProvider(...));
* 注意事项：只可以在 AppContext init 期间使用。
* @version : 2015年12月18日
* @author 赵永春(zyc@hasor.net)
*/
public class ClassAwareProvider<T> implements Provider<T>, AppContextAware {
private Class<? extends T> implementation;
private AppContext appContext;
public ClassAwareProvider(Class<? extends T> implementation) {
this.implementation = Hasor.assertIsNotNull(implementation);
}
@Override
public void setAppContext(AppContext appContext) {
this.appContext = appContext;
}
@Override
public T get() {
if (this.appContext != null && this.implementation != null) {
return this.appContext.getInstance(this.implementation);
}
throw new IllegalStateException("has not been initialized");
}
}