Package org.eclipse.mat.internal.collectionextract

Class WrapperMapExtractor

java.lang.Object

org.eclipse.mat.internal.collectionextract.WrapperCollectionExtractor

org.eclipse.mat.internal.collectionextract.WrapperMapExtractor

All Implemented Interfaces:

ICollectionExtractor, IMapExtractor

Direct Known Subclasses:

KeySetCollectionExtractor, WrapperFieldMapExtractor

public class WrapperMapExtractor
extends WrapperCollectionExtractor
implements IMapExtractor

Nested Class Summary

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

IMapExtractor.EntryObject

Constructor Summary

Constructors

Constructor	Description
WrapperMapExtractor(String field)
WrapperMapExtractor(String field, ICollectionExtractor extractor)

Method Summary

Modifier and Type	Method	Description
Iterator<Map.Entry<IObject,IObject>>	extractMapEntries(IObject coll)	Extracts the contents of a map (i.e.
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.WrapperCollectionExtractor

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

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, getCapacity, getFillRatio, getNumberOfNotNullElements, getSize, hasCapacity, hasExtractableArray, hasExtractableContents, hasFillRatio, hasSize

Constructor Details

WrapperMapExtractor

public WrapperMapExtractor(String field)

WrapperMapExtractor

public WrapperMapExtractor(String field,
 ICollectionExtractor extractor)

Method Details

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 coll)

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:

coll - - 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