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/*
* Copyright (c) 2008-2014 MongoDB, Inc.
*
* 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.
*/
// CommandResult.java
package com.mongodb;
import java.util.List;
/**
* A simple wrapper for the result of getLastError() calls and other commands
*/
public class CommandResult extends BasicDBObject {
CommandResult(ServerAddress serverAddress) {
if (serverAddress == null) {
throw new IllegalArgumentException("server address is null");
}
_host = serverAddress;
//so it is shown in toString/debug
put("serverUsed", serverAddress.toString());
}
/**
* gets the "ok" field which is the result of the command
* @return True if ok
*/
public boolean ok(){
Object okValue = get("ok");
if (okValue instanceof Boolean) {
return (Boolean) okValue;
} else if (okValue instanceof Number) {
return ((Number) okValue).intValue() == 1;
} else {
return false;
}
}
/**
* gets the "errmsg" field which holds the error message
* @return The error message or null
*/
public String getErrorMessage(){
Object errorMessage = get( "errmsg" );
if ( errorMessage == null )
return null;
return errorMessage.toString();
}
/**
* utility method to create an exception with the command name
* @return The mongo exception or null
*/
public MongoException getException() {
if ( !ok() ) { // check for command failure
if (getCode() == 50) {
return new MongoExecutionTimeoutException(getCode(), getErrorMessage());
}
else {
return new CommandFailureException( this );
}
} else if (hasErr()) {
return getWriteException();
} else {
return null;
}
}
private MongoException getWriteException() {
int code = getCode();
if (code == 11000 || code == 11001 || code == 12582) {
return new MongoException.DuplicateKey(this);
} else {
return new WriteConcernException(this);
}
}
/**
* returns the "code" field, as an int
* @return -1 if there is no code
*/
@SuppressWarnings("unchecked")
int getCode() {
int code = getInt("code", -1);
// mongos may return a list of documents representing getlasterror responses from each shard. Return the one with a matching
// "err" field, so that it can be used to get the error code
if (code == -1 && get("errObjects") != null) {
for (BasicDBObject curErrorDocument : (List<BasicDBObject>) get("errObjects")) {
if (get("err").equals(curErrorDocument.get("err"))) {
code = curErrorDocument.getInt("code", -1);
break;
}
}
}
return code;
}
/**
* check the "err" field
* @return if it has it, and isn't null
*/
boolean hasErr(){
String err = getString("err");
return err != null && err.length() > 0;
}
/**
* throws an exception containing the cmd name, in case the command failed, or the "err/code" information
* @throws MongoException
*/
public void throwOnError() {
if ( !ok() || hasErr() ){
throw getException();
}
}
public ServerAddress getServerUsed() {
return _host;
}
private final ServerAddress _host;
private static final long serialVersionUID = 1L;
}