exec/java-exec/src/main/java/org/apache/drill/exec/store/easy/json/reader/CountingJsonReader.java

/*
 * 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.drill.exec.store.easy.json.reader;

import java.io.IOException;

import com.fasterxml.jackson.core.JsonToken;

import io.netty.buffer.DrillBuf;

import org.apache.drill.exec.vector.complex.writer.BaseWriter.ComplexWriter;

public class CountingJsonReader extends BaseJsonReader {

  public CountingJsonReader(DrillBuf workBuf, boolean enableNanInf, boolean enableEscapeAnyChar) {
    super(workBuf, enableNanInf, enableEscapeAnyChar, true);
  }

  @Override
  protected void writeDocument(ComplexWriter writer, JsonToken t) throws IOException {
    switch (t) {
      case START_OBJECT:
      case START_ARRAY:
        writer.rootAsMap().bit("count").writeBit(1);
        parser.skipChildren();
        break;
      default:
        throw createDocumentTopLevelException();
    }
  }

  @Override
  public void ensureAtLeastOneField(ComplexWriter writer) {

  }
}