/*
* 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.index.analysis;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.DelegatingAnalyzerWrapper;
import org.elasticsearch.common.collect.CopyOnWriteHashMap;
import java.util.Map;
public final class FieldNameAnalyzer extends DelegatingAnalyzerWrapper {
private final Map<String, Analyzer> analyzers;
public FieldNameAnalyzer(Map<String, Analyzer> analyzers) {
super(Analyzer.PER_FIELD_REUSE_STRATEGY);
this.analyzers = CopyOnWriteHashMap.copyOf(analyzers);
}
public Map<String, Analyzer> analyzers() {
return analyzers;
}
@Override
protected Analyzer getWrappedAnalyzer(String fieldName) {
Analyzer analyzer = analyzers.get(fieldName);
if (analyzer != null) {
return analyzer;
}
// Don't be lenient here and return the default analyzer
// Fields need to be explicitly added
throw new IllegalArgumentException("Field [" + fieldName + "] has no associated analyzer");
}
}