/**
 * Copyright 2013-2014 Guoqiang Chen, Shanghai, China. All rights reserved.
 *
 * Email: subchen@gmail.com
 * URL: http://subchen.github.io/
 *
 * 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 jetbrick.web.mvc.results;

import jetbrick.ioc.annotations.Managed;
import jetbrick.web.mvc.RequestContext;
import jetbrick.web.mvc.ResultHandlerResolver;

@Managed
public class ObjectResultHandler implements ResultHandler<Object> {

    // 没有直接注入，否则会产生循环注入失败
    private ResultHandlerResolver resolver;

    @Override
    public void handle(RequestContext ctx, Object result) throws Exception {
        if (resolver == null) {
            resolver = ctx.getWebConfig().getResultHandlerResolver();
        }

        if (result != null) {
            Class<?> resultClass = result.getClass();
            if (resultClass == Object.class) {
                throw new IllegalStateException("Invalid result class.");
            }

            ResultHandler<Object> handler = resolver.lookup(resultClass);
            handler.handle(ctx, result);
        }
    }
}