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// Copyright (C) 2018 The Android Open Source Project
//
// 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.google.gerrit.elasticsearch;
import com.google.common.collect.ImmutableMap;
import java.util.Map;
class ElasticSetting {
/** The custom char mappings of "." to " " and "_" to " " in the form of UTF-8 */
private static final ImmutableMap<String, String> CUSTOM_CHAR_MAPPING =
ImmutableMap.of("\\u002E", "\\u0020", "\\u005F", "\\u0020");
static SettingProperties createSetting(ElasticConfiguration config) {
return new ElasticSetting.Builder().addCharFilter().addAnalyzer().build(config);
}
static class Builder {
private final ImmutableMap.Builder<String, FieldProperties> fields =
new ImmutableMap.Builder<>();
SettingProperties build(ElasticConfiguration config) {
SettingProperties properties = new SettingProperties();
properties.analysis = fields.build();
properties.numberOfShards = config.numberOfShards;
properties.numberOfReplicas = config.numberOfReplicas;
return properties;
}
Builder addCharFilter() {
FieldProperties charMapping = new FieldProperties("mapping");
charMapping.mappings = getCustomCharMappings(CUSTOM_CHAR_MAPPING);
FieldProperties charFilter = new FieldProperties();
charFilter.customMapping = charMapping;
fields.put("char_filter", charFilter);
return this;
}
Builder addAnalyzer() {
FieldProperties customAnalyzer = new FieldProperties("custom");
customAnalyzer.tokenizer = "standard";
customAnalyzer.charFilter = new String[] {"custom_mapping"};
customAnalyzer.filter = new String[] {"lowercase"};
FieldProperties analyzer = new FieldProperties();
analyzer.customWithCharFilter = customAnalyzer;
fields.put("analyzer", analyzer);
return this;
}
private static String[] getCustomCharMappings(ImmutableMap<String, String> map) {
int mappingIndex = 0;
int numOfMappings = map.size();
String[] mapping = new String[numOfMappings];
for (Map.Entry<String, String> e : map.entrySet()) {
mapping[mappingIndex++] = e.getKey() + "=>" + e.getValue();
}
return mapping;
}
}
static class SettingProperties {
Map<String, FieldProperties> analysis;
Integer numberOfShards;
Integer numberOfReplicas;
}
static class FieldProperties {
String tokenizer;
String type;
String[] charFilter;
String[] filter;
String[] mappings;
FieldProperties customMapping;
FieldProperties customWithCharFilter;
FieldProperties() {}
FieldProperties(String type) {
this.type = type;
}
}
}
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