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;
  
  import org.junit.jupiter.api.Test;
  
  import java.io.ByteArrayOutputStream;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import java.io.IOException;
  
  import org.apache.avro.generic.GenericData;
  import org.apache.avro.specific.SpecificData;
  import org.apache.avro.specific.SpecificDatumWriter;
  import org.apache.avro.io.BinaryData;
  import org.apache.avro.io.DatumWriter;
  import org.apache.avro.io.Encoder;
  import org.apache.avro.io.EncoderFactory;
  
  import org.apache.avro.test.TestRecord;
  import org.apache.avro.test.Kind;
  import org.apache.avro.test.MD5;
  
  public class TestCompare {
  
    @Test
    void specificRecord() throws Exception {
      TestRecord s1 = new TestRecord();
      TestRecord s2 = new TestRecord();
      s1.setName("foo");
      s1.setKind(Kind.BAZ);
      s1.setHash(new MD5(new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5 }));
      s2.setName("bar");
      s2.setKind(Kind.BAR);
      s2.setHash(new MD5(new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 6 }));
      Schema schema = SpecificData.get().getSchema(TestRecord.class);
  
      check(schema, s1, s2, true, new SpecificDatumWriter<>(schema), SpecificData.get());
      s2.setKind(Kind.BAZ);
      check(schema, s1, s2, true, new SpecificDatumWriter<>(schema), SpecificData.get());
    }
  
    private static <T> void check(Schema schema, T o1, T o2, boolean comparable, DatumWriter<T> writer,
        GenericData comparator) throws Exception {
  
      byte[] b1 = render(o1, schema, writer);
      byte[] b2 = render(o2, schema, writer);
      assertEquals(-1, BinaryData.compare(b1, 0, b2, 0, schema));
      assertEquals(1, BinaryData.compare(b2, 0, b1, 0, schema));
      assertEquals(0, BinaryData.compare(b1, 0, b1, 0, schema));
      assertEquals(0, BinaryData.compare(b2, 0, b2, 0, schema));
  
      assertEquals(-1, compare(o1, o2, schema, comparable, comparator));
      assertEquals(1, compare(o2, o1, schema, comparable, comparator));
      assertEquals(0, compare(o1, o1, schema, comparable, comparator));
      assertEquals(0, compare(o2, o2, schema, comparable, comparator));
  
      assert (o1.equals(o1));
      assert (o2.equals(o2));
      assert (!o1.equals(o2));
      assert (!o2.equals(o1));
      assert (!o1.equals(new Object()));
      assert (!o2.equals(new Object()));
      assert (!o1.equals(null));
      assert (!o2.equals(null));
  
      assert (o1.hashCode() != o2.hashCode());
  
      // check BinaryData.hashCode against Object.hashCode
      if (schema.getType() != Schema.Type.ENUM) {
        assertEquals(o1.hashCode(), BinaryData.hashCode(b1, 0, b1.length, schema));
        assertEquals(o2.hashCode(), BinaryData.hashCode(b2, 0, b2.length, schema));
      }
  
      // check BinaryData.hashCode against GenericData.hashCode
      assertEquals(comparator.hashCode(o1, schema), BinaryData.hashCode(b1, 0, b1.length, schema));
      assertEquals(comparator.hashCode(o2, schema), BinaryData.hashCode(b2, 0, b2.length, schema));
  
    }
  
    @SuppressWarnings(value = "unchecked")
    private static int compare(Object o1, Object o2, Schema schema, boolean comparable, GenericData comparator) {
      return comparable ? ((Comparable<Object>) o1).compareTo(o2) : comparator.compare(o1, o2, schema);
    }
  
    private static <T> byte[] render(T datum, Schema schema, DatumWriter<T> writer) throws IOException {
      ByteArrayOutputStream out = new ByteArrayOutputStream();
      writer.setSchema(schema);
      Encoder enc = new EncoderFactory().directBinaryEncoder(out, null);
      writer.write(datum, enc);
      enc.flush();
      return out.toByteArray();
    }
  }
  