com.gemstone.gemfire.management.internal.web.http.converter.SerializableObjectHttpMessageConverter Maven / Gradle / Ivy

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/*
 * Copyright (c) 2010-2015 Pivotal Software, Inc. 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. 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. See accompanying
 * LICENSE file.
 */
package com.gemstone.gemfire.management.internal.web.http.converter;

import java.io.IOException;
import java.io.Serializable;

import com.gemstone.gemfire.internal.lang.ObjectUtils;
import com.gemstone.gemfire.internal.util.IOUtils;

import org.springframework.http.HttpInputMessage;
import org.springframework.http.HttpMessage;
import org.springframework.http.HttpOutputMessage;
import org.springframework.http.MediaType;
import org.springframework.http.converter.AbstractHttpMessageConverter;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.http.converter.HttpMessageNotWritableException;
import org.springframework.util.StreamUtils;

/**
 * The SerializableObjectHttpMessageConverter class is a Spring HttpMessageConverter for converting bytes streams to/from
 * Serializable Objects.
 * 
 * @author John Blum
 * @see java.io.Serializable
 * @see org.springframework.http.HttpInputMessage
 * @see org.springframework.http.HttpMessage
 * @see org.springframework.http.HttpOutputMessage
 * @see org.springframework.http.MediaType
 * @see org.springframework.http.converter.AbstractHttpMessageConverter
 * @since 7.5
 */
@SuppressWarnings("unused")
public class SerializableObjectHttpMessageConverter extends AbstractHttpMessageConverter {

  public SerializableObjectHttpMessageConverter() {
    super(MediaType.APPLICATION_OCTET_STREAM, MediaType.ALL);
  }

  /*
  @Override
  public boolean canRead(final Class clazz, final MediaType mediaType) {
    return canRead(mediaType);
  }
  */

  @Override
  protected boolean supports(final Class type) {
    if (logger.isTraceEnabled()) {
      logger.trace(String.format("%1$s.supports(%2$s)", getClass().getName(), type.getName()),
        new Throwable());
    }
    /*
    logger.warn(String.format("%1$s.supports(%2$s)", getClass().getName(), type.getName()));
    final StringWriter writer = new StringWriter();
    new Throwable().printStackTrace(new PrintWriter(writer));
    logger.warn(writer.toString());
    */
    return (type != null && Serializable.class.isAssignableFrom(type));
  }

  @Override
  protected Serializable readInternal(final Class type, final HttpInputMessage inputMessage)
    throws IOException, HttpMessageNotReadableException
  {
    try {
      return type.cast(IOUtils.deserializeObject(IOUtils.toByteArray(inputMessage.getBody()),
        ObjectUtils.defaultIfNull(type.getClassLoader(), getClass().getClassLoader())));
    }
    catch (ClassNotFoundException e) {
      throw new HttpMessageNotReadableException(String.format(
        "Unable to convert the HTTP message body into an Object of type (%1$s)", type.getName()), e);
    }
  }

  protected void setContentLength(final HttpMessage message, final byte[] messageBody) {
    message.getHeaders().setContentLength(messageBody.length);
  }

  @Override
  protected void writeInternal(final Serializable serializableObject, final HttpOutputMessage outputMessage)
    throws IOException, HttpMessageNotWritableException
  {
    final byte[] messageBody = IOUtils.serializeObject(serializableObject);
    setContentLength(outputMessage, messageBody);
    StreamUtils.copy(messageBody, outputMessage.getBody());
  }

}