recordio.hh

hadoop:Nutch集群平台

/**
 * Copyright 2005 The Apache Software Foundation
 *
 * Licensed 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 RECORDIO_HH_
#define RECORDIO_HH_

#include <stdio.h>
#include <stdint.h>
#include <iostream>
#include <cstring>
#include <string>
#include <vector>
#include <map>
#include <bitset>

namespace hadoop {
  
class InStream {
public:
  virtual ssize_t read(void *buf, size_t buflen) = 0;
};

class OutStream {
public:
  virtual ssize_t write(const void *buf, size_t len) = 0;
};

class IArchive;
class OArchive;

class Record {
public:
  virtual bool validate() const = 0;
  virtual void serialize(OArchive& archive, const char* tag) const = 0;
  virtual void deserialize(IArchive& archive, const char* tag) = 0;
  virtual const std::string& type() const = 0;
  virtual const std::string& signature() const = 0;
};

enum RecFormat { kBinary, kXML, kCSV };

class RecordReader {
private:
  IArchive* mpArchive;
public:
  RecordReader(InStream& stream, RecFormat f);
  virtual void read(hadoop::Record& record);
  virtual ~RecordReader();
};

class RecordWriter {
private:
  OArchive* mpArchive;
public:
  RecordWriter(OutStream& stream, RecFormat f);
  virtual void write(hadoop::Record& record);
  virtual ~RecordWriter();
};
}; // end namspace hadoop

#include "archive.hh"
#include "exception.hh"

#endif /*RECORDIO_HH_*/