org.apache.kafka.connect.tools.PredicateDoc Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.kafka.connect.tools;
import org.apache.kafka.common.config.ConfigDef;
import org.apache.kafka.connect.runtime.isolation.Plugins;
import org.apache.kafka.connect.transforms.predicates.Predicate;
import java.io.PrintStream;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;
public class PredicateDoc {
private static final class DocInfo {
final String predicateName;
final String overview;
final ConfigDef configDef;
private > DocInfo(Class
predicateClass, String overview, ConfigDef configDef) {
this.predicateName = predicateClass.getName();
this.overview = overview;
this.configDef = configDef;
}
}
private static final List PREDICATES = new Plugins(Collections.emptyMap()).predicates().stream()
.map(p -> {
try {
String overviewDoc = (String) p.pluginClass().getDeclaredField("OVERVIEW_DOC").get(null);
ConfigDef configDef = (ConfigDef) p.pluginClass().getDeclaredField("CONFIG_DEF").get(null);
return new DocInfo(p.pluginClass(), overviewDoc, configDef);
} catch (ReflectiveOperationException e) {
throw new RuntimeException("Predicate class " + p.pluginClass().getName() + " lacks either a `public static final String OVERVIEW_DOC` or `public static final ConfigDef CONFIG_DEF`");
}
})
.sorted(Comparator.comparing(docInfo -> docInfo.predicateName))
.collect(Collectors.toList());
private static void printPredicateHtml(PrintStream out, DocInfo docInfo) {
out.println("");
out.print("");
out.print("" + docInfo.predicateName + "");
out.println("
");
out.println(docInfo.overview);
out.println("");
out.println(docInfo.configDef.toHtml(6, key -> docInfo.predicateName + "_" + key));
out.println("");
}
private static void printHtml(PrintStream out) {
for (final DocInfo docInfo : PREDICATES) {
printPredicateHtml(out, docInfo);
}
}
public static void main(String... args) {
printHtml(System.out);
}
}