Package org.eclipse.mat.snapshot
Class ClassHistogramRecord
- java.lang.Object
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- org.eclipse.mat.snapshot.HistogramRecord
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- org.eclipse.mat.snapshot.ClassHistogramRecord
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- All Implemented Interfaces:
Serializable
- Direct Known Subclasses:
XClassHistogramRecord
public class ClassHistogramRecord extends HistogramRecord
This class holds the histogram data on the objects found in the object set for which a histogram was computed (aggregated per class).- See Also:
- Serialized Form
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Field Summary
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Fields inherited from class org.eclipse.mat.snapshot.HistogramRecord
COMPARATOR_FOR_LABEL, COMPARATOR_FOR_NUMBEROFOBJECTS, COMPARATOR_FOR_RETAINEDHEAPSIZE, COMPARATOR_FOR_USEDHEAPSIZE
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Constructor Summary
Constructors Constructor Description ClassHistogramRecord(String label, int classId, int[] objectIds, long usedHeapSize, long retainedHeapSize)
Build a histogram recordClassHistogramRecord(String label, int classId, long numberOfObjects, long usedHeapSize, long retainedHeapSize)
Build a histogram record
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description long
calculateRetainedSize(ISnapshot snapshot, boolean calculateIfNotAvailable, boolean approximation, IProgressListener listener)
Find out the retained sizeint
getClassId()
Get id of the class this class histogram record stands for.int[]
getObjectIds()
Get ids of the objects this class histogram record stands for.String
toString()
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Methods inherited from class org.eclipse.mat.snapshot.HistogramRecord
getLabel, getNumberOfObjects, getRetainedHeapSize, getUsedHeapSize, incNumberOfObjects, incNumberOfObjects, incRetainedHeapSize, incUsedHeapSize, reverseComparator, setLabel, setNumberOfObjects, setRetainedHeapSize, setUsedHeapSize
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Constructor Detail
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ClassHistogramRecord
public ClassHistogramRecord(String label, int classId, long numberOfObjects, long usedHeapSize, long retainedHeapSize)
Build a histogram record- Parameters:
label
- the class nameclassId
- the id of the classnumberOfObjects
- the number of objects of that classusedHeapSize
- the space used by those objectsretainedHeapSize
- the total of the size of all the objects retained by those objects. 0 means calculate when required, negative means approximate size, positive means exact retained size is known.
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ClassHistogramRecord
public ClassHistogramRecord(String label, int classId, int[] objectIds, long usedHeapSize, long retainedHeapSize)
Build a histogram record- Parameters:
label
- the class nameclassId
- the id of the classobjectIds
- the ids of objects of that classusedHeapSize
- the space used by those objectsretainedHeapSize
- the total of the size of all the objects retained by those objects. 0 means calculate when required, negative means approximate size, positive means exact retained size is known.
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Method Detail
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getClassId
public int getClassId()
Get id of the class this class histogram record stands for.- Returns:
- id of the class this class histogram record stands for
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getObjectIds
public int[] getObjectIds()
Get ids of the objects this class histogram record stands for.- Returns:
- ids of the objects this class histogram record stands for
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calculateRetainedSize
public long calculateRetainedSize(ISnapshot snapshot, boolean calculateIfNotAvailable, boolean approximation, IProgressListener listener) throws SnapshotException
Find out the retained size- Parameters:
snapshot
- the snapshotcalculateIfNotAvailable
- whether to calculate the size if not already availableapproximation
- whether to use an approximation to the retained size (sum of the individual retained sizes)listener
- to report progress and errors- Returns:
- the retained size, negated if approximate, 0 if not available
- Throws:
SnapshotException
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