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src/main/java/org/opensearch/plugin/insights/core/service/categorizer/MappingVisitor.java
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| /* | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| * | ||
| * The OpenSearch Contributors require contributions made to | ||
| * this file be licensed under the Apache-2.0 license or a | ||
| * compatible open source license. | ||
| */ | ||
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| /* | ||
| * 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. | ||
| */ | ||
|
|
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| /* | ||
| * Modifications Copyright OpenSearch Contributors. See | ||
| * GitHub history for details. | ||
| */ | ||
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| package org.opensearch.plugin.insights.core.service.categorizer; | ||
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| import java.util.Map; | ||
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| /** | ||
| * Visitor pattern for obtaining index mappings | ||
| * | ||
| * @opensearch.internal | ||
| */ | ||
| final class MappingVisitor { | ||
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| private MappingVisitor() {} | ||
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| @SuppressWarnings("unchecked") | ||
| static String visitMapping(Map<String, ?> propertiesAsMap, String[] fieldName, int idx) { | ||
| if (propertiesAsMap.containsKey(fieldName[idx])) { | ||
| Map<String, ?> fieldMapping = (Map<String, ?>) propertiesAsMap.get(fieldName[idx]); | ||
| if (idx == fieldName.length - 1) { | ||
| return (String) fieldMapping.get("type"); | ||
| } else { | ||
| // Multi field case | ||
| if (fieldMapping.containsKey("fields")) { | ||
| return visitMapping((Map<String, ?>) fieldMapping.get("fields"), fieldName, idx + 1); | ||
| } else { | ||
| return null; | ||
| } | ||
| } | ||
| } | ||
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| // fieldName not found at current level | ||
| // call visitMapping() for any fields with subfields (contains "properties" key) | ||
| for (Object v : propertiesAsMap.values()) { | ||
| if (v instanceof Map) { | ||
| Map<String, ?> fieldMapping = (Map<String, ?>) v; | ||
| if (fieldMapping.containsKey("properties")) { | ||
| return visitMapping((Map<String, ?>) fieldMapping.get("properties"), fieldName, idx); | ||
| } | ||
| } | ||
| } | ||
| // no mapping found | ||
| return null; | ||
| } | ||
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| } |
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