package org.apache.helix.controller.serializer;
import java.io.ByteArrayInputStream;
import java.io.StringWriter;
import org.apache.helix.HelixException;
import org.apache.log4j.Logger;
import org.codehaus.jackson.map.DeserializationConfig;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.SerializationConfig;
/*
* 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.
*/
/**
* Default serializer implementation for converting to/from strings. Uses the Jackson JSON library
* to do the conversion
*/
public class DefaultStringSerializer implements StringSerializer {
private static Logger logger = Logger.getLogger(DefaultStringSerializer.class);
@Override
public <T> String serialize(final T data) {
if (data == null) {
return null;
}
ObjectMapper mapper = new ObjectMapper();
SerializationConfig serializationConfig = mapper.getSerializationConfig();
serializationConfig.set(SerializationConfig.Feature.INDENT_OUTPUT, true);
serializationConfig.set(SerializationConfig.Feature.AUTO_DETECT_FIELDS, true);
serializationConfig.set(SerializationConfig.Feature.CAN_OVERRIDE_ACCESS_MODIFIERS, true);
StringWriter sw = new StringWriter();
try {
mapper.writeValue(sw, data);
} catch (Exception e) {
logger.error("Exception during payload data serialization.", e);
throw new HelixException(e);
}
return sw.toString();
}
@Override
public <T> T deserialize(final Class<T> clazz, final String string) {
if (string == null || string.length() == 0) {
return null;
}
ObjectMapper mapper = new ObjectMapper();
ByteArrayInputStream bais = new ByteArrayInputStream(string.getBytes());
DeserializationConfig deserializationConfig = mapper.getDeserializationConfig();
deserializationConfig.set(DeserializationConfig.Feature.AUTO_DETECT_FIELDS, true);
deserializationConfig.set(DeserializationConfig.Feature.AUTO_DETECT_SETTERS, true);
deserializationConfig.set(DeserializationConfig.Feature.AUTO_DETECT_CREATORS, true);
deserializationConfig.set(DeserializationConfig.Feature.CAN_OVERRIDE_ACCESS_MODIFIERS, true);
try {
T payload = mapper.readValue(bais, clazz);
return payload;
} catch (Exception e) {
logger.error("Exception during deserialization of payload bytes: " + string, e);
return null;
}
}
}