/*
 * Copyright (c) 2016. Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 * http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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 utils.http;

import com.amazonaws.AmazonWebServiceResponse;
import com.amazonaws.http.HttpResponse;
import com.amazonaws.http.HttpResponseHandler;
import com.amazonaws.util.IOUtils;

public class HttpResponseHandlers {

    public static HttpResponseHandler<AmazonWebServiceResponse<String>> stringResponseHandler() {
        return responseHandler(new FunctionWithException<HttpResponse, String>() {
            @Override
            public String apply(HttpResponse in) throws Exception {
                return IOUtils.toString(in.getContent());
            }
        });
    }

    public static <T> HttpResponseHandler<AmazonWebServiceResponse<T>> responseHandler(final FunctionWithException<HttpResponse, T> handle) {
        return new HttpResponseHandler<AmazonWebServiceResponse<T>>() {

            @Override
            public AmazonWebServiceResponse<T> handle(HttpResponse response) throws Exception {
                AmazonWebServiceResponse<T> resp = new AmazonWebServiceResponse<T>();
                resp.setResult(handle.apply(response));
                return resp;
            }

            @Override
            public boolean needsConnectionLeftOpen() {
                return false;
            }
        };
    }

    interface FunctionWithException<Input, Output> {
        Output apply(Input in) throws Exception;
    }
}