com.metamx.common.parsers.ToLowerCaseParser Maven / Gradle / Ivy
/*
* Copyright 2011,2012 Metamarkets Group Inc.
*
* Licensed 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 com.metamx.common.parsers;
import com.google.common.collect.Maps;
import com.metamx.common.IAE;
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();
}
}