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.asterix.external.parser;
  
  import static org.apache.asterix.common.exceptions.ErrorCode.PARSER_DATA_PARSER_UNEXPECTED_TOKEN;
  
  import java.io.DataOutput;
  import java.io.IOException;
  import java.io.InputStream;
  
  import org.apache.asterix.common.exceptions.ErrorCode;
  import org.apache.asterix.common.exceptions.RuntimeDataException;
  import org.apache.asterix.external.api.IExternalDataRuntimeContext;
  import org.apache.asterix.external.api.IRawRecord;
  import org.apache.asterix.external.api.IRecordDataParser;
  import org.apache.asterix.external.api.IStreamDataParser;
  import org.apache.asterix.external.parser.jackson.ADMToken;
  import org.apache.asterix.external.provider.context.NoOpExternalRuntimeDataContext;
  import org.apache.asterix.om.types.ARecordType;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  
  import com.fasterxml.jackson.core.JsonFactory;
  import com.fasterxml.jackson.core.JsonParser;
  import com.fasterxml.jackson.databind.JsonNode;
  import com.fasterxml.jackson.databind.node.TreeTraversingParser;
  
  /**
   * JSON format parser using Jackson parser.
   */
  public class JSONDataParser extends AbstractJsonDataParser implements IStreamDataParser, IRecordDataParser<char[]> {
  
      /**
       * This constructor is used by several query runtime evaluators and tests
       *
       * @param recordType  defined type.
       * @param jsonFactory Jackson JSON parser factory.
       */
      public JSONDataParser(ARecordType recordType, JsonFactory jsonFactory) {
          this(recordType, jsonFactory, NoOpExternalRuntimeDataContext.INSTANCE);
      }
  
      /**
       * Initialize JSONDataParser
       *
       * @param recordType  defined type.
       * @param jsonFactory Jackson JSON parser factory.
       */
      public JSONDataParser(ARecordType recordType, JsonFactory jsonFactory, IExternalDataRuntimeContext context) {
          super(recordType, jsonFactory, context);
      }
  
      @Override
      public void setInputStream(InputStream in) throws IOException {
          setInput(jsonFactory.createParser(in));
      }
  
      public void setInputNode(JsonNode node) {
          setInput(new TreeTraversingParser(node));
      }
  
      private void setInput(JsonParser parser) {
          jsonParser = parser;
          geometryCoParser.reset(jsonParser);
      }
  
      @Override
      public boolean parse(IRawRecord<? extends char[]> record, DataOutput out) throws HyracksDataException {
          try {
              //TODO(wyk): find a way to reset byte[] instead of creating a new parser for each record.
              jsonParser = jsonFactory.createParser(record.get(), 0, record.size());
              geometryCoParser.reset(jsonParser);
              if (nextToken() != ADMToken.OBJECT_START) {
                  throw new ParseException(PARSER_DATA_PARSER_UNEXPECTED_TOKEN, currentToken(), ADMToken.OBJECT_START);
              }
              valueEmbedder.reset();
              parseObject(rootType, out);
              return true;
          } catch (IOException e) {
              throw createException(e);
          }
      }
  
      @Override
      public boolean parse(DataOutput out) throws HyracksDataException {
          try {
              if (nextToken() == ADMToken.EOF) {
                  return false;
              }
              valueEmbedder.reset();
              parseObject(rootType, out);
              return true;
          } catch (IOException e) {
              throw new RuntimeDataException(ErrorCode.RECORD_READER_MALFORMED_INPUT_STREAM, e);
          }
      }
  
      @Override
      public boolean reset(InputStream in) throws IOException {
          setInputStream(in);
          return true;
      }
  }
  