Package org.eclipse.mat.internal.collectionextract

Class FieldSizedCapacityMapExtractor

java.lang.Object

org.eclipse.mat.internal.collectionextract.FieldArrayCollectionExtractor

org.eclipse.mat.internal.collectionextract.FieldSizeArrayCollectionExtractor

org.eclipse.mat.internal.collectionextract.FieldSizedCapacityCollectionExtractor

org.eclipse.mat.internal.collectionextract.FieldSizedCapacityMapExtractor

All Implemented Interfaces:

ICollectionExtractor, IMapExtractor

public class FieldSizedCapacityMapExtractor
extends FieldSizedCapacityCollectionExtractor
implements IMapExtractor

Nested Class Summary

Nested classes/interfaces inherited from interface org.eclipse.mat.inspections.collectionextract.IMapExtractor

IMapExtractor.EntryObject

Constructor Summary

Constructors

Constructor	Description
FieldSizedCapacityMapExtractor(String sizeField, String arrayField, String capacityField)

Method Summary

Modifier and Type	Method	Description
Iterator<Map.Entry<IObject,IObject>>	extractMapEntries(IObject collection)	Extracts the contents of a map (i.e.
Integer	getCapacity(IObject coll)	Return the capacity of the collection, if applicable
Double	getCollisionRatio(IObject coll)	Calculates the collision ratio in the collection.
boolean	hasCollisionRatio()	Check if the extractor can calculate collision ratio

Methods inherited from class org.eclipse.mat.internal.collectionextract.FieldSizedCapacityCollectionExtractor

extractEntries, extractEntryIds, getArray, getNumberOfNotNullElements, hasCapacity, hasExtractableArray, hasExtractableContents

Methods inherited from class org.eclipse.mat.internal.collectionextract.FieldSizeArrayCollectionExtractor

getSize, hasSize

Methods inherited from class org.eclipse.mat.internal.collectionextract.FieldArrayCollectionExtractor

getFillRatio, hasFillRatio

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.eclipse.mat.inspections.collectionextract.ICollectionExtractor

extractEntries, extractEntryIds, getFillRatio, getNumberOfNotNullElements, getSize, hasCapacity, hasExtractableArray, hasExtractableContents, hasFillRatio, hasSize

Constructor Details

FieldSizedCapacityMapExtractor

public FieldSizedCapacityMapExtractor(String sizeField,
 String arrayField,
 String capacityField)

Method Details

getCapacity

public Integer getCapacity(IObject coll)
                    throws SnapshotException

Description copied from interface: ICollectionExtractor

Return the capacity of the collection, if applicable

Specified by:

getCapacity in interface ICollectionExtractor

Overrides:

getCapacity in class FieldSizedCapacityCollectionExtractor

Parameters:

coll - - the collection to find the capacity of

Returns:

the capacity in bytes, or null if unavailable

Throws:

SnapshotException - if there is a problem retrieving data from the snapshot

See Also:

• ICollectionExtractor.hasCapacity()

hasCollisionRatio

public boolean hasCollisionRatio()

Description copied from interface: IMapExtractor

Check if the extractor can calculate collision ratio

Specified by:

hasCollisionRatio in interface IMapExtractor

Returns:

true if @IMapExtractor.getCollisionRatio(IObject) could be called

See Also:

• IMapExtractor.getCollisionRatio(IObject)

getCollisionRatio

public Double getCollisionRatio(IObject coll)
                         throws SnapshotException

Description copied from interface: IMapExtractor

Calculates the collision ratio in the collection. Could be an estimate.

Specified by:

getCollisionRatio in interface IMapExtractor

Parameters:

coll - - the collection to calculate the collision ratio of

Returns:

Double number of elements with colliding keys / size

Throws:

SnapshotException

See Also:

• IMapExtractor.hasCollisionRatio()

extractMapEntries

public Iterator<Map.Entry<IObject,IObject>> extractMapEntries(IObject collection)
                                                       throws SnapshotException

Description copied from interface: IMapExtractor

Extracts the contents of a map (i.e. an IObject representing a Map) and provides an Iterator over them

Specified by:

extractMapEntries in interface IMapExtractor

Parameters:

collection - - the map to extract contents from

Returns:

an Iterator over the entries. If the original Map had an Entry object, the content of the iterator would usually be EntryObject

Throws:

SnapshotException