61 lines
1.1 KiB
C++
61 lines
1.1 KiB
C++
#include "IDGenerator.h"
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#include <QDataStream>
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#include <QVariant>
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#include<QIODevice>
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qint64 IDGenerator::new_id()
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{
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if (!m_recycle_id.isEmpty())
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{
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int id = m_recycle_id.begin().key();
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m_recycle_id.erase(m_recycle_id.begin());
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return id;
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}
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if(!m_use_id.isEmpty())
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{
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while (m_use_id.contains(m_id))
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{
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m_id++;
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}
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return m_id;
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}
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return m_id++;
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}
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void IDGenerator::recylce_id(qint64 id)
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{
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m_recycle_id.insert(id, 0);
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}
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qint64 IDGenerator::next_id()
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{
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if (!m_recycle_id.isEmpty())
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{
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int id = m_recycle_id.cbegin().key();
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return id;
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}
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return m_id;
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}
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void IDGenerator::use_id(qint64 id)
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{
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m_use_id.insert(id, 0);
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}
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QByteArray IDGenerator::to_bytes() const
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{
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QByteArray bytes;
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QDataStream stream(&bytes, QIODevice::WriteOnly);
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stream << m_id << m_recycle_id;
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return bytes.toBase64(); //目的：QVariant转换成字符串时会截断'\0'
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}
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void IDGenerator::from_bytes(const QByteArray& bytes)
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{
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QByteArray _bytes = QByteArray::fromBase64(bytes);
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QDataStream stream(&_bytes, QIODevice::ReadOnly);
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stream >> m_id >> m_recycle_id;
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}
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