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
   *
   *    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.arrow.c;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.assertj.core.api.Assertions.catchThrowableOfType;
  
  import java.io.IOException;
  import java.io.PrintWriter;
  import java.io.StringWriter;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  import java.util.function.Function;
  import java.util.stream.Collectors;
  import org.apache.arrow.memory.BufferAllocator;
  import org.apache.arrow.memory.RootAllocator;
  import org.apache.arrow.vector.VectorLoader;
  import org.apache.arrow.vector.VectorSchemaRoot;
  import org.apache.arrow.vector.dictionary.Dictionary;
  import org.apache.arrow.vector.dictionary.DictionaryProvider;
  import org.apache.arrow.vector.ipc.ArrowReader;
  import org.apache.arrow.vector.ipc.message.ArrowRecordBatch;
  import org.apache.arrow.vector.types.pojo.ArrowType;
  import org.apache.arrow.vector.types.pojo.Field;
  import org.apache.arrow.vector.types.pojo.Schema;
  import org.junit.jupiter.api.Test;
  
  // Regression test for https://github.com/apache/arrow-java/issues/759
  final class ExceptionTest {
    @Test
    public void testException() throws IOException {
      final Schema schema =
          new Schema(Collections.singletonList(Field.nullable("ints", new ArrowType.Int(32, true))));
      final List<Object> batches = new ArrayList<>();
  
      try (BufferAllocator allocator = new RootAllocator();
          VectorSchemaRoot root = VectorSchemaRoot.create(schema, allocator)) {
  
        final String exceptionMessage = "This is a message for testing exception.";
  
        RuntimeException exToThrow = new RuntimeException(exceptionMessage);
        batches.add(exToThrow);
  
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        exToThrow.printStackTrace(pw);
        final String expectExceptionMessage = sw.toString();
  
        ArrowReader source = new ExceptionMemoryArrowReader(allocator, schema, batches);
  
        try (final ArrowArrayStream stream = ArrowArrayStream.allocateNew(allocator);
            final VectorSchemaRoot importRoot = VectorSchemaRoot.create(schema, allocator)) {
          final VectorLoader loader = new VectorLoader(importRoot);
          Data.exportArrayStream(allocator, source, stream);
  
          try (final ArrowReader reader = Data.importArrayStream(allocator, stream)) {
            IOException jniException = catchThrowableOfType(IOException.class, reader::loadNextBatch);
            final String jniMessage = jniException.getMessage();
            assertThat(jniMessage.endsWith(expectExceptionMessage + "}"));
          }
        }
      }
    }
  
    static class ExceptionMemoryArrowReader extends ArrowReader {
      private final Schema schema;
      private final List<Object> batches; // set ArrowRecordBatch or Exception
      private final DictionaryProvider provider;
      private int nextBatch;
  
      ExceptionMemoryArrowReader(BufferAllocator allocator, Schema schema, List<Object> batches) {
        super(allocator);
        this.schema = schema;
        this.batches = batches;
        this.provider = new CDataDictionaryProvider();
        this.nextBatch = 0;
      }
  
      @Override
      public Dictionary lookup(long id) {
        return provider.lookup(id);
      }
  
      @Override
      public Set<Long> getDictionaryIds() {
        return provider.getDictionaryIds();
      }
  
      @Override
      public Map<Long, Dictionary> getDictionaryVectors() {
        return getDictionaryIds().stream()
            .collect(Collectors.toMap(Function.identity(), this::lookup));
      }
  
      @Override
      public boolean loadNextBatch() throws IOException {
        if (nextBatch < batches.size()) {
          Object object = batches.get(nextBatch++);
          if (object instanceof RuntimeException) {
            throw (RuntimeException) object;
          }
          VectorLoader loader = new VectorLoader(getVectorSchemaRoot());
          loader.load((ArrowRecordBatch) object);
          return true;
        }
        return false;
      }
  
      @Override
      public long bytesRead() {
        return 0;
      }
  
      @Override
      protected void closeReadSource() throws IOException {
        try {
          for (Object object : batches) {
            if (object instanceof ArrowRecordBatch) {
              ArrowRecordBatch batch = (ArrowRecordBatch) object;
              batch.close();
            }
          }
        } catch (Exception e) {
          throw new IOException(e);
        }
      }
  
      @Override
      protected Schema readSchema() {
        return schema;
      }
    }
  }
  