RAMInputStream.h

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// Copyright (c) 2009-2014 Alan Wright. All rights reserved.
// Distributable under the terms of either the Apache License (Version 2.0)
// or the GNU Lesser General Public License.
 
#ifndef RAMINPUTSTREAM_H
#define RAMINPUTSTREAM_H
 
#include "IndexInput.h"
 
namespace Lucene {

class LPPAPI RAMInputStream : public IndexInput {
public:
    RAMInputStream();
    RAMInputStream(const RAMFilePtr& f);
    virtual ~RAMInputStream();
 
    LUCENE_CLASS(RAMInputStream);
 
public:
    static const int32_t BUFFER_SIZE;
 
protected:
    RAMFilePtr file;
    int64_t _length;
    ByteArray currentBuffer;
    int32_t currentBufferIndex;
    int32_t bufferPosition;
    int64_t bufferStart;
    int32_t bufferLength;
 
public:
    virtual void close();

    virtual int64_t length();

    virtual uint8_t readByte();

    virtual void readBytes(uint8_t* b, int32_t offset, int32_t length);

    virtual int64_t getFilePointer();

    virtual void seek(int64_t pos);

    virtual LuceneObjectPtr clone(const LuceneObjectPtr& other = LuceneObjectPtr());
 
protected:
    void switchCurrentBuffer(bool enforceEOF);
};
 
}
 
#endif