be/src/udf/udf-debug.h

// 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.


#ifndef IMPALA_UDF_UDF_DEBUG_H
#define IMPALA_UDF_UDF_DEBUG_H

// THIS FILE IS USED BY THE STANDALONE IMPALA UDF DEVELOPMENT KIT.
// IT MUST BE BUILDABLE WITH C++98 AND WITHOUT ANY INTERNAL IMPALA HEADERS.

#include "udf/udf.h"

#include <string>
#include <sstream>

namespace impala_udf {

template<typename T>
inline std::string DebugString(const T& val) {
  if (val.is_null) return "NULL";
  std::stringstream ss;
  ss << val.val;
  return ss.str();
}

template<>
inline std::string DebugString(const StringVal& val) {
  if (val.is_null) return "NULL";
  return std::string(reinterpret_cast<const char*>(val.ptr), val.len);
}

}

#endif