org.commonjava.web.json.ser.ServletSerializerUtils.java Source code

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Here is the source code for org.commonjava.web.json.ser.ServletSerializerUtils.java

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/*******************************************************************************
 * Copyright (c) 2014 Red Hat, Inc..
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Red Hat, Inc. - initial API and implementation
 ******************************************************************************/
package org.commonjava.web.json.ser;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;

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

import com.google.gson.reflect.TypeToken;

public final class ServletSerializerUtils {

    private static final Logger LOGGER = LoggerFactory.getLogger(ServletSerializerUtils.class);

    private ServletSerializerUtils() {
    }

    public static <T> T fromRequestBody(final HttpServletRequest req, final JsonSerializer serializer,
            final Class<T> type) {
        String encoding = req.getCharacterEncoding();
        if (encoding == null) {
            encoding = "UTF-8";
        }

        try {
            return serializer.fromStream(req.getInputStream(), encoding, type);
        } catch (final IOException e) {
            LOGGER.error("Failed to deserialize type: {} from HttpServletRequest body. Error: {}", e,
                    type.getName(), e.getMessage());

            throw new RuntimeException("Cannot read request.");
        }
    }

    public static <T> T fromRequestBody(final HttpServletRequest req, final JsonSerializer serializer,
            final TypeToken<T> token) {
        String encoding = req.getCharacterEncoding();
        if (encoding == null) {
            encoding = "UTF-8";
        }

        try {
            return serializer.fromStream(req.getInputStream(), encoding, token);
        } catch (final IOException e) {
            LOGGER.error("Failed to deserialize type: {} from HttpServletRequest body. Error: {}", e,
                    token.getType(), e.getMessage());

            throw new RuntimeException("Cannot read request.");
        }
    }
}