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MongoDbBasicConverters.java
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MongoDbBasicConverters.java
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/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.camel.component.mongodb.converters;
import java.util.Map;
import com.mongodb.BasicDBObject;
import com.mongodb.DBObject;
import com.mongodb.util.JSON;
import org.apache.camel.Converter;
import org.codehaus.jackson.map.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@SuppressWarnings({"rawtypes"})
@Converter
public final class MongoDbBasicConverters {
private static final transient Logger LOG = LoggerFactory.getLogger(MongoDbBasicConverters.class);
// Jackson's ObjectMapper is thread-safe, so no need to create a pool nor synchronize access to it
private static ObjectMapper objectMapper = new ObjectMapper();
private MongoDbBasicConverters() { }
@Converter
public static DBObject fromMapToDBObject(Map<?, ?> map) {
return new BasicDBObject(map);
}
@Converter
public static Map<String, Object> fromBasicDBObjectToMap(BasicDBObject basicDbObject) {
return basicDbObject;
}
@Converter
public static DBObject fromStringToDBObject(String s) {
DBObject answer = null;
try {
answer = (DBObject) JSON.parse(s);
} catch (Exception e) {
LOG.warn("String -> DBObject conversion selected, but the following exception occurred. Returning null.", e);
}
return answer;
}
@Converter
public static DBObject fromAnyObjectToDBObject(Object value) {
BasicDBObject answer;
try {
Map m = MongoDbBasicConverters.objectMapper.convertValue(value, Map.class);
answer = new BasicDBObject(m);
} catch (Exception e) {
LOG.warn("Conversion has fallen back to generic Object -> DBObject, but unable to convert type {}. Returning null.",
value.getClass().getCanonicalName());
return null;
}
return answer;
}
}