Package org.eclipse.mat.query
Interface ContextDerivedData.DerivedCalculator
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- Enclosing class:
- ContextDerivedData
public static interface ContextDerivedData.DerivedCalculator
A way of actually doing the calculations.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description void
calculate(ContextDerivedData.DerivedOperation operation, java.lang.Object row, IProgressListener listener)
Do the calculation for the row.java.lang.Object
lookup(java.lang.Object row)
Get the results of the calculation from the row.
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Method Detail
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lookup
java.lang.Object lookup(java.lang.Object row)
Get the results of the calculation from the row. Allows some caching.- Parameters:
row
- the row- Returns:
- the result, perhaps a Long for retained size
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calculate
void calculate(ContextDerivedData.DerivedOperation operation, java.lang.Object row, IProgressListener listener) throws SnapshotException
Do the calculation for the row. Save the result in the row or elsewhere, ready forlookup(Object)
- Parameters:
operation
- the operation to do on the row to get the derived datarow
- the rowlistener
- to indicate progress and exceptions- Throws:
SnapshotException
- if there was a problem with the calculation
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