/*
 * Copyright 2012 astamuse company,Ltd.
 * 
 * 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.astamuse.asta4d.web.dispatch.request.transformer;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.astamuse.asta4d.web.dispatch.request.ResultTransformer;
import com.astamuse.asta4d.web.dispatch.response.provider.HeaderInfoProvider;

public class DefaultExceptionTransformer implements ResultTransformer {

    private static final Logger logger = LoggerFactory.getLogger(DefaultExceptionTransformer.class);

    @Override
    public Object transformToContentProvider(Object result) {
        if (result instanceof Throwable) {
            Throwable t = (Throwable) result;
            logger.error(t.getMessage(), t);
            return new HeaderInfoProvider(500, false);
        } else {
            return null;
        }
    }

}