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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2005-2014 Red Hat, Inc.
 * Red Hat licenses this file to you 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 org.hornetq.utils;

import org.hornetq.api.core.HornetQBuffer;
import org.hornetq.api.core.SimpleString;

/**
 * Helper methods to read and write from HornetQBuffer.
 *
 * @author Clebert Suconic
 *
 *
 */
public class BufferHelper
{

   /** Size of a String as if it was a Nullable Simple String */
   public static int sizeOfNullableSimpleString(String str)
   {
      if (str == null)
      {
         return DataConstants.SIZE_BOOLEAN;
      }
      else
      {
         return DataConstants.SIZE_BOOLEAN + sizeOfSimpleString(str);
      }
   }

   /** Size of a String as it if was a Simple String*/
   public static int sizeOfSimpleString(String str)
   {
      return DataConstants.SIZE_INT + str.length() * 2;
   }

   public static void writeAsNullableSimpleString(HornetQBuffer buffer, String str)
   {
      buffer.writeNullableSimpleString(SimpleString.toSimpleString(str));
   }

   public static String readNullableSimpleStringAsString(HornetQBuffer buffer)
   {
      SimpleString str = buffer.readNullableSimpleString();
      return str != null ? str.toString() : null;
   }

   public static void writeAsSimpleString(HornetQBuffer buffer, String str)
   {
      buffer.writeSimpleString(new SimpleString(str));
   }

   /**
    * @param buffer
    */
   public static void writeNullableBoolean(HornetQBuffer buffer, Boolean value)
   {
      buffer.writeBoolean(value != null);

      if (value != null)
      {
         buffer.writeBoolean(value.booleanValue());
      }
   }

   public static int sizeOfNullableBoolean(Boolean value)
   {
      return DataConstants.SIZE_BOOLEAN + (value != null ? DataConstants.SIZE_BOOLEAN : 0);
   }

   public static Boolean readNullableBoolean(HornetQBuffer buffer)
   {
      boolean isNotNull = buffer.readBoolean();

      if (isNotNull)
      {
         return buffer.readBoolean();
      }
      else
      {
         return null;
      }
   }

   /**
    * @param buffer
    */
   public static void writeNullableLong(HornetQBuffer buffer, Long value)
   {
      buffer.writeBoolean(value != null);

      if (value != null)
      {
         buffer.writeLong(value.longValue());
      }
   }

   /**
    * @param buffer
    */
   public static void writeNullableDouble(HornetQBuffer buffer, Double value)
   {
      buffer.writeBoolean(value != null);

      if (value != null)
      {
         buffer.writeDouble(value.doubleValue());
      }
   }

   public static int sizeOfNullableLong(Long value)
   {
      return DataConstants.SIZE_BOOLEAN + (value != null ? DataConstants.SIZE_LONG : 0);
   }

   public static int sizeOfNullableDouble(Double value)
   {
      return DataConstants.SIZE_BOOLEAN + (value != null ? DataConstants.SIZE_DOUBLE : 0);
   }


   public static Long readNullableLong(HornetQBuffer buffer)
   {
      boolean isNotNull = buffer.readBoolean();

      if (isNotNull)
      {
         return buffer.readLong();
      }
      else
      {
         return null;
      }
   }

   /**
    * @param buffer
    */
   public static void writeNullableInteger(HornetQBuffer buffer, Integer value)
   {
      buffer.writeBoolean(value != null);

      if (value != null)
      {
         buffer.writeInt(value.intValue());
      }
   }

   public static int sizeOfNullableInteger(Integer value)
   {
      return DataConstants.SIZE_BOOLEAN + (value != null ? DataConstants.SIZE_INT : 0);
   }

   public static Integer readNullableInteger(HornetQBuffer buffer)
   {
      boolean isNotNull = buffer.readBoolean();

      if (isNotNull)
      {
         return buffer.readInt();
      }
      else
      {
         return null;
      }
   }

   public static Double readNullableDouble(HornetQBuffer buffer)
   {
      boolean isNotNull = buffer.readBoolean();

      if (isNotNull)
      {
         return buffer.readDouble();
      }
      else
      {
         return null;
      }
   }

}