io.druid.java.util.common.parsers.ToLowerCaseParser Maven / Gradle / Ivy
/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets 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 io.druid.java.util.common.parsers;
import com.google.common.collect.Maps;
import java.util.List;
import java.util.Map;
/**
*/
public class ToLowerCaseParser implements Parser
{
private final Parser baseParser;
public ToLowerCaseParser(Parser baseParser)
{
this.baseParser = baseParser;
}
@Override
public Map parse(String input)
{
Map line = baseParser.parse(input);
Map retVal = Maps.newLinkedHashMap();
for (Map.Entry entry : line.entrySet()) {
String k = entry.getKey().toLowerCase();
if(retVal.containsKey(k)) {
// Duplicate key, case-insensitively
throw new ParseException("Unparseable row. Duplicate key found : [%s]", k);
}
retVal.put(k, entry.getValue());
}
return retVal;
}
@Override
public void setFieldNames(Iterable fieldNames)
{
baseParser.setFieldNames(fieldNames);
}
@Override
public List getFieldNames()
{
return baseParser.getFieldNames();
}
}