org.elasticsearch.hadoop.util.FieldAlias Maven / Gradle / Ivy
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.hadoop.util;
import java.util.LinkedHashMap;
import java.util.Locale;
import java.util.Map;
/**
* Simple class for providing basic aliases for fields.
*/
public class FieldAlias {
private final Map fieldToAlias;
private final boolean caseInsensitive;
public FieldAlias(boolean caseInsensitive) {
this(new LinkedHashMap(), caseInsensitive);
}
public FieldAlias(Map alias, boolean caseInsensitive) {
this.fieldToAlias = alias;
this.caseInsensitive = caseInsensitive;
}
public String toES(String string) {
String alias = fieldToAlias.get(string);
if (alias == null) {
alias = (caseInsensitive ? string.toLowerCase(Locale.ROOT) : string);
fieldToAlias.put(string, alias);
}
return alias;
}
@Override
public String toString() {
return fieldToAlias.toString();
}
}