/*
 * 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.lucene.misc.index;

import java.net.URI;
import java.util.List;
import javax.tools.DiagnosticCollector;
import javax.tools.JavaCompiler;
import javax.tools.JavaFileObject;
import javax.tools.SimpleJavaFileObject;
import javax.tools.ToolProvider;
import org.apache.lucene.tests.util.LuceneTestCase;

public class TestBPIndexReordererJavadocExample extends LuceneTestCase {

  public void testClassJavadocExampleCalls() throws Exception {
    // expected: the class javadoc example's two reorderer calls compile; actual: both APIs are gone
    String source =
        """
        import java.util.concurrent.ForkJoinPool;
        import org.apache.lucene.index.*;
        import org.apache.lucene.misc.index.BPIndexReorderer;
        import org.apache.lucene.store.Directory;

        class Example {
          CodecReader run(LeafReader reader, Directory targetDir, ForkJoinPool pool)
              throws Exception {
            BPIndexReorderer reorderer = new BPIndexReorderer();
            reorderer.setForkJoinPool(pool);
            return reorderer.reorder(SlowCodecReaderWrapper.wrap(reader), targetDir);
          }
        }
        """;
    JavaFileObject file =
        new SimpleJavaFileObject(URI.create("string:///Example.java"), JavaFileObject.Kind.SOURCE) {
          @Override
          public CharSequence getCharContent(boolean ignoreEncodingErrors) {
            return source;
          }
        };
    JavaCompiler javac = ToolProvider.getSystemJavaCompiler();
    DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<>();
    List<String> options =
        List.of(
            "-classpath", System.getProperty("java.class.path"),
            "-d", createTempDir().toString(),
            "-proc:none");
    boolean compiled = javac.getTask(null, null, diagnostics, options, null, List.of(file)).call();
    assertTrue("javac errors: " + diagnostics.getDiagnostics(), compiled);
  }
}