/*
* Copyright amoeba.meidusa.com
*
* This program is free software; you can redistribute it and/or modify it under the terms of
* the GNU AFFERO GENERAL PUBLIC LICENSE as published by the Free Software Foundation; either version 3 of the License,
* or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU AFFERO GENERAL PUBLIC LICENSE for more details.
* You should have received a copy of the GNU AFFERO GENERAL PUBLIC LICENSE along with this program;
* if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package com.meidusa.amoeba.mongodb.packet;
import java.io.UnsupportedEncodingException;
import org.bson.BSONObject;
import com.meidusa.amoeba.mongodb.io.MongodbPacketConstant;
/**
* <h6><a name="MongoWireProtocol-OPUPDATE"></a>OP_UPDATE <a name="MongoWireProtocol-OPUPDATE"></a></h6>
*
* <p>The OP_UPDATE message is used to update a document in a collection. The format of a OP_UPDATE message is</p>
*
* <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
* <pre class="code-java">struct OP_UPDATE {
* MsgHeader header; <span class="code-comment">// standard message header
* </span> int32 ZERO; <span class="code-comment">// 0 - reserved <span class="code-keyword">for</span> <span class="code-keyword">future</span> use
*
* </span> cstring fullCollectionName; <span class="code-comment">// <span class="code-quote">"dbname.collectionname"</span>
* </span> int32 updateFlags; <span class="code-comment">// bit vector. see below
* </span> document selector; <span class="code-comment">// the query to select the document
* </span> document update; <span class="code-comment">// specification of the update to perform
* </span>}
* </pre>
*
* @author Struct
*
*/
public class UpdateMongodbPacket extends RequestMongodbPacket {
public int updateFlags;
public BSONObject selector;
public BSONObject update;
public UpdateMongodbPacket(){
this.opCode = MongodbPacketConstant.OP_UPDATE;
}
protected void init(MongodbPacketBuffer buffer) {
super.init(buffer);
updateFlags = buffer.readInt();
if(buffer.hasRemaining()){
selector = buffer.readBSONObject();
}
if(buffer.hasRemaining()){
update = buffer.readBSONObject();
}
}
@Override
protected void write2Buffer(MongodbPacketBuffer buffer)
throws UnsupportedEncodingException {
super.write2Buffer(buffer);
buffer.writeInt(updateFlags);
if(selector != null){
buffer.writeBSONObject(selector);
}
if(update != null){
buffer.writeBSONObject(update);
}
}
}