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.codegentest;
  
  import org.apache.avro.Conversion;
  import org.apache.avro.LogicalType;
  import org.apache.avro.LogicalTypes;
  import org.apache.avro.Schema;
  import org.apache.avro.generic.GenericData;
  import org.apache.avro.generic.GenericFixed;
  
  import java.math.BigInteger;
  import java.nio.ByteBuffer;
  import java.util.Arrays;
  
  public class CustomDecimalConversion extends Conversion<CustomDecimal> {
    @Override
    public Class<CustomDecimal> getConvertedType() {
      return CustomDecimal.class;
    }
  
    @Override
    public String getLogicalTypeName() {
      return "decimal";
    }
  
    @Override
    public CustomDecimal fromBytes(ByteBuffer value, Schema schema, LogicalType type) {
      int scale = ((LogicalTypes.Decimal) type).getScale();
      byte[] bytes = value.get(new byte[value.remaining()]).array();
      return new CustomDecimal(new BigInteger(bytes), scale);
    }
  
    @Override
    public ByteBuffer toBytes(CustomDecimal value, Schema schema, LogicalType type) {
      int scale = ((LogicalTypes.Decimal) type).getScale();
      return ByteBuffer.wrap(value.toByteArray(scale));
    }
  
    @Override
    public CustomDecimal fromFixed(GenericFixed value, Schema schema, LogicalType type) {
      int scale = ((LogicalTypes.Decimal) type).getScale();
      return new CustomDecimal(new BigInteger(value.bytes()), scale);
    }
  
    @Override
    public GenericFixed toFixed(CustomDecimal value, Schema schema, LogicalType type) {
      int scale = ((LogicalTypes.Decimal) type).getScale();
      byte fillByte = (byte) (value.signum() < 0 ? 0xFF : 0x00);
      byte[] unscaled = value.toByteArray(scale);
      byte[] bytes = new byte[schema.getFixedSize()];
      int offset = bytes.length - unscaled.length;
  
      // Fill the front of the array and copy remaining with unscaled values
      Arrays.fill(bytes, 0, offset, fillByte);
      System.arraycopy(unscaled, 0, bytes, offset, bytes.length - offset);
  
      return new GenericData.Fixed(schema, bytes);
    }
  }
  