content: /*
   * 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
   *
   *     https://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.avro.generic;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  import java.util.Random;
  import java.util.stream.Collectors;
  import java.util.stream.IntStream;
  
  import org.apache.avro.Schema;
  import org.junit.jupiter.api.Test;
  
  public class TestGenericDatumReader {
  
    private static final Random r = new Random(System.currentTimeMillis());
  
    @Test
    void readerCache() {
      final GenericDatumReader.ReaderCache cache = new GenericDatumReader.ReaderCache(this::findStringClass);
      List<Thread> threads = IntStream.rangeClosed(1, 200).mapToObj((int index) -> {
        final Schema schema = TestGenericDatumReader.this.build(index);
        final WithSchema s = new WithSchema(schema, cache);
        return (Runnable) () -> s.test();
      }).map(Thread::new).collect(Collectors.toList());
      threads.forEach(Thread::start);
      threads.forEach((Thread t) -> {
        try {
          t.join();
        } catch (InterruptedException e) {
          throw new RuntimeException(e);
        }
      });
    }
  
    @Test
    void newInstanceFromString() {
      final GenericDatumReader.ReaderCache cache = new GenericDatumReader.ReaderCache(this::findStringClass);
  
      Object object = cache.newInstanceFromString(StringBuilder.class, "Hello");
      assertEquals(StringBuilder.class, object.getClass());
      StringBuilder builder = (StringBuilder) object;
      assertEquals("Hello", builder.toString());
  
    }
  
    static class WithSchema {
      private final Schema schema;
  
      private final GenericDatumReader.ReaderCache cache;
  
      public WithSchema(Schema schema, GenericDatumReader.ReaderCache cache) {
        this.schema = schema;
        this.cache = cache;
      }
  
      public void test() {
        this.cache.getStringClass(schema);
      }
    }
  
    private List<Schema> list = new ArrayList<>();
  
    private Schema build(int index) {
      int schemaNum = (index - 1) % 50;
      if (index <= 50) {
        Schema schema = Schema.createRecord("record_" + schemaNum, "doc", "namespace", false,
            Arrays.asList(new Schema.Field("field" + schemaNum, Schema.create(Schema.Type.STRING))));
        list.add(schema);
      }
  
      return list.get(schemaNum);
    }
  
    private Class findStringClass(Schema schema) {
      this.sleep();
      if (schema.getType() == Schema.Type.INT) {
        return Integer.class;
      }
      if (schema.getType() == Schema.Type.STRING) {
        return String.class;
      }
      if (schema.getType() == Schema.Type.LONG) {
        return Long.class;
      }
      if (schema.getType() == Schema.Type.FLOAT) {
        return Float.class;
      }
      return String.class;
    }
  
    private void sleep() {
      long timeToSleep = r.nextInt(30) + 10L;
      if (timeToSleep > 25) {
        try {
          Thread.sleep(timeToSleep);
        } catch (InterruptedException e) {
          throw new RuntimeException(e);
        }
      }
    }
  }
  