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// Copyright (C) 2016 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 com.google.gerrit.index.FieldDef;
import com.google.gerrit.index.FieldType;
import com.google.gerrit.index.Schema;
import java.util.Map;
class ElasticMapping {
static MappingProperties createMapping(Schema<?> schema, ElasticQueryAdapter adapter) {
ElasticMapping.Builder mapping = new ElasticMapping.Builder(adapter);
for (FieldDef<?, ?> field : schema.getFields().values()) {
String name = field.getName();
FieldType<?> fieldType = field.getType();
if (fieldType == FieldType.EXACT) {
mapping.addExactField(name);
} else if (fieldType == FieldType.TIMESTAMP) {
mapping.addTimestamp(name);
} else if (fieldType == FieldType.INTEGER
|| fieldType == FieldType.INTEGER_RANGE
|| fieldType == FieldType.LONG) {
mapping.addNumber(name);
} else if (fieldType == FieldType.FULL_TEXT) {
mapping.addStringWithAnalyzer(name);
} else if (fieldType == FieldType.PREFIX || fieldType == FieldType.STORED_ONLY) {
mapping.addString(name);
} else {
throw new IllegalStateException("Unsupported field type: " + fieldType.getName());
}
}
return mapping.build();
}
static class Builder {
private final ElasticQueryAdapter adapter;
private final ImmutableMap.Builder<String, FieldProperties> fields =
new ImmutableMap.Builder<>();
Builder(ElasticQueryAdapter adapter) {
this.adapter = adapter;
}
MappingProperties build() {
MappingProperties properties = new MappingProperties();
properties.properties = fields.build();
return properties;
}
Builder addExactField(String name) {
FieldProperties key = new FieldProperties(adapter.exactFieldType());
key.index = adapter.indexProperty();
FieldProperties properties;
properties = new FieldProperties(adapter.exactFieldType());
properties.fields = ImmutableMap.of("key", key);
fields.put(name, properties);
return this;
}
Builder addTimestamp(String name) {
FieldProperties properties = new FieldProperties("date");
properties.type = "date";
properties.format = "dateOptionalTime";
fields.put(name, properties);
return this;
}
Builder addNumber(String name) {
fields.put(name, new FieldProperties("long"));
return this;
}
Builder addString(String name) {
fields.put(name, new FieldProperties(adapter.stringFieldType()));
return this;
}
Builder addStringWithAnalyzer(String name) {
FieldProperties key = new FieldProperties(adapter.stringFieldType());
key.analyzer = "custom_with_char_filter";
fields.put(name, key);
return this;
}
Builder add(String name, String type) {
fields.put(name, new FieldProperties(type));
return this;
}
}
static class MappingProperties {
Map<String, FieldProperties> properties;
}
static class FieldProperties {
String type;
String index;
String format;
String analyzer;
Map<String, FieldProperties> fields;
FieldProperties(String type) {
this.type = type;
}
}
}
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