/**
* 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.hadoop.yarn.server.applicationhistoryservice.metrics
.loadsimulator.util;
import org.codehaus.jackson.annotate.JsonAutoDetect;
import org.codehaus.jackson.annotate.JsonMethod;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.SerializationConfig;
import java.io.IOException;
/**
* Small wrapper that configures the ObjectMapper with some defaults.
*/
public class Json {
private ObjectMapper myObjectMapper;
/**
* Creates default Json ObjectMapper that maps fields.
*/
public Json() {
this(false);
}
/**
* Creates a Json ObjectMapper that maps fields and optionally pretty prints the
* serialized objects.
*
* @param pretty a flag - if true the output will be pretty printed.
*/
public Json(boolean pretty) {
myObjectMapper = new ObjectMapper();
myObjectMapper.setVisibility(JsonMethod.FIELD, JsonAutoDetect.Visibility.ANY);
if (pretty) {
myObjectMapper.configure(SerializationConfig.Feature.INDENT_OUTPUT, true);
}
}
public String serialize(Object o) throws IOException {
return myObjectMapper.writeValueAsString(o);
}
public <T> T deserialize(String content, Class<T> paramClass) throws IOException {
return myObjectMapper.readValue(content, paramClass);
}
}