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.path;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.avro.AvroTypeException;
  import org.apache.avro.Schema;
  import org.apache.avro.util.SchemaUtil;
  
  /**
   * an {@link AvroTypeException} with extra fields used to trace back the path to
   * a bad value through an object graph
   */
  public class TracingAvroTypeException extends AvroTypeException implements PathTracingException<AvroTypeException> {
    private final List<PathElement> reversePath;
  
    public TracingAvroTypeException(AvroTypeException cause) {
      super(cause.getMessage(), cause);
      this.reversePath = new ArrayList<>(3); // expected to be short
    }
  
    @Override
    public void tracePath(PathElement step) {
      reversePath.add(step);
    }
  
    @Override
    public AvroTypeException summarize(Schema root) {
      AvroTypeException cause = (AvroTypeException) getCause();
  
      StringBuilder sb = new StringBuilder();
      sb.append(cause.getMessage());
  
      if (reversePath != null && !reversePath.isEmpty()) {
        sb.append(" at ");
        if (root != null) {
          sb.append(SchemaUtil.describe(root));
        }
        for (int i = reversePath.size() - 1; i >= 0; i--) {
          PathElement step = reversePath.get(i);
          sb.append(step.toString());
        }
      }
      return new AvroTypeException(sb.toString(), cause);
    }
  }
  