/*
* 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.ambari.logfeeder.mapper;
import java.util.Map;
import org.apache.ambari.logfeeder.util.LogFeederUtil;
import org.apache.commons.lang3.StringUtils;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
/**
* Overrides the value for the field
*/
public class MapperFieldName extends Mapper {
private static final Logger LOG = Logger.getLogger(MapperFieldName.class);
private String newValue = null;
@Override
public boolean init(String inputDesc, String fieldName, String mapClassCode, Object mapConfigs) {
init(inputDesc, fieldName, mapClassCode);
if (!(mapConfigs instanceof Map)) {
LOG.fatal("Can't initialize object. mapConfigs class is not of type Map. " + mapConfigs.getClass().getName());
return false;
}
@SuppressWarnings("unchecked")
Map<String, Object> mapObjects = (Map<String, Object>) mapConfigs;
newValue = (String) mapObjects.get("new_fieldname");
if (StringUtils.isEmpty(newValue)) {
LOG.fatal("Map field value is empty.");
return false;
}
return true;
}
@Override
public Object apply(Map<String, Object> jsonObj, Object value) {
if (newValue != null) {
jsonObj.remove(fieldName);
jsonObj.put(newValue, value);
} else {
LogFeederUtil.logErrorMessageByInterval(this.getClass().getSimpleName() + ":apply",
"New fieldName is null, so transformation is not applied. " + this.toString(), null, LOG, Level.ERROR);
}
return value;
}
}