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Adds `generateContextApiSpec` gradle task that generates whitelist api specs under `modules/lang-painless/src/main/generated/whitelist-json`. The common classes are in `painless-common.json`, the specialized classes per context are in `painless-$context.json`. eg. `painless-aggs.json` has the specialization for the aggs contexts Refs: #49879 Backport: 2aa2224
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modules/lang-painless/src/doc/java/org/elasticsearch/painless/ContextApiSpecGenerator.java
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| @@ -0,0 +1,75 @@ | ||
| /* | ||
| * 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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| package org.elasticsearch.painless; | ||
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| import org.elasticsearch.common.SuppressForbidden; | ||
| import org.elasticsearch.common.io.PathUtils; | ||
| import org.elasticsearch.common.xcontent.XContentBuilder; | ||
| import org.elasticsearch.common.xcontent.XContentFactory; | ||
| import org.elasticsearch.core.internal.io.IOUtils; | ||
| import org.elasticsearch.painless.action.PainlessContextInfo; | ||
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| import java.io.IOException; | ||
| import java.io.PrintStream; | ||
| import java.nio.charset.StandardCharsets; | ||
| import java.nio.file.Files; | ||
| import java.nio.file.Path; | ||
| import java.nio.file.StandardOpenOption; | ||
| import java.util.List; | ||
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| public class ContextApiSpecGenerator { | ||
| public static void main(String[] args) throws IOException { | ||
| List<PainlessContextInfo> contexts = ContextGeneratorCommon.getContextInfos(); | ||
| ContextGeneratorCommon.PainlessInfos infos = new ContextGeneratorCommon.PainlessInfos(contexts); | ||
| Path rootDir = resetRootDir(); | ||
| Path json = rootDir.resolve("painless-common.json"); | ||
| try (PrintStream jsonStream = new PrintStream( | ||
| Files.newOutputStream(json, StandardOpenOption.CREATE_NEW, StandardOpenOption.WRITE), | ||
| false, StandardCharsets.UTF_8.name())) { | ||
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| XContentBuilder builder = XContentFactory.jsonBuilder(jsonStream); | ||
| builder.startObject(); | ||
| builder.field(PainlessContextInfo.CLASSES.getPreferredName(), infos.common); | ||
| builder.endObject(); | ||
| builder.flush(); | ||
| } | ||
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| for (PainlessInfoJson.Context context : infos.contexts) { | ||
| json = rootDir.resolve("painless-" + context.getName() + ".json"); | ||
| try (PrintStream jsonStream = new PrintStream( | ||
| Files.newOutputStream(json, StandardOpenOption.CREATE_NEW, StandardOpenOption.WRITE), | ||
| false, StandardCharsets.UTF_8.name())) { | ||
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| XContentBuilder builder = XContentFactory.jsonBuilder(jsonStream); | ||
| context.toXContent(builder, null); | ||
| builder.flush(); | ||
| } | ||
| } | ||
| } | ||
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| @SuppressForbidden(reason = "resolve context api directory with environment") | ||
| private static Path resetRootDir() throws IOException { | ||
| Path rootDir = PathUtils.get("./src/main/generated/whitelist-json"); | ||
| IOUtils.rm(rootDir); | ||
| Files.createDirectories(rootDir); | ||
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| return rootDir; | ||
| } | ||
| } |
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