83 lines
3.3 KiB
MQL5
83 lines
3.3 KiB
MQL5
//+------------------------------------------------------------------+
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//| CArrayProvider.mqh |
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//| Synthetic Test Harness for MetaTrader 5 |
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//| Institutional Architecture in MQL5 - Part 1 Series |
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//+------------------------------------------------------------------+
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#ifndef SYNTHETIC_TEST_HARNESS_CARRAY_PROVIDER_MQH
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#define SYNTHETIC_TEST_HARNESS_CARRAY_PROVIDER_MQH
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#include "ITickProvider.mqh"
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//+------------------------------------------------------------------+
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//| CArrayProvider: reads synthetic ticks from an in-memory array. |
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//| |
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//| Usage: define your scenario as a MockTick[], pass it to the |
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//| constructor, and the provider iterates through it sequentially. |
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//| Call Reset() to re-run the same scenario without re-creating |
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//| the provider. |
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//| |
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//| Ownership: copies the source array internally (owns its data). |
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//+------------------------------------------------------------------+
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class CArrayProvider : public ITickProvider
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{
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private:
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MockTick m_ticks[];
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int m_current_index;
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int m_tick_count;
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public:
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//+---------------------------------------------------------------+
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//| Constructor: copies the source array so the provider owns its |
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//| data. The caller's array can be safely discarded after this. |
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//+---------------------------------------------------------------+
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CArrayProvider(MockTick &source_ticks[])
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{
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m_tick_count = ArraySize(source_ticks);
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m_current_index = 0;
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ArrayResize(m_ticks, m_tick_count);
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for(int i = 0; i < m_tick_count; i++)
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m_ticks[i] = source_ticks[i];
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}
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//+---------------------------------------------------------------+
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//| HasNext: returns true if unprocessed ticks remain. |
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//+---------------------------------------------------------------+
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bool HasNext(void)
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{
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return(m_current_index < m_tick_count);
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}
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//+---------------------------------------------------------------+
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//| GetNextTick: fills out_tick and advances the cursor by one. |
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//| Returns false when all ticks have been consumed. |
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//+---------------------------------------------------------------+
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bool GetNextTick(MockTick &out_tick)
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{
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if(!HasNext())
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return(false);
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out_tick = m_ticks[m_current_index];
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m_current_index++;
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return(true);
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}
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//+---------------------------------------------------------------+
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//| Reset: rewinds to the first tick for re-running scenarios. |
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//+---------------------------------------------------------------+
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void Reset(void)
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{
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m_current_index = 0;
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}
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//+---------------------------------------------------------------+
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//| GetTickCount: returns the total number of ticks in the array. |
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//+---------------------------------------------------------------+
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int GetTickCount(void)
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{
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return(m_tick_count);
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}
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};
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//+------------------------------------------------------------------+
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#endif
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