org.eclipse.mat.internal.collectionextract

Class SetFromCollectionExtractor

java.lang.Object

org.eclipse.mat.internal.collectionextract.SetFromCollectionExtractor

All Implemented Interfaces:

ICollectionExtractor, IMapExtractor

public class SetFromCollectionExtractor
extends Object
implements IMapExtractor

Give a set-like extractor from a collection extractor

Nested Class Summary

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

IMapExtractor.EntryObject

Constructor Summary

Constructors

Constructor and Description
SetFromCollectionExtractor(ICollectionExtractor ex)
SetFromCollectionExtractor(ICollectionExtractor ex, double collisionRatio)

Method Summary

Modifier and Type	Method and Description
IObjectArray	extractEntries(IObject collection) Extracts the array containing the collection content
int[]	extractEntryIds(IObject collection) Returns the object ids (int) for all objects which are contained in the collection
Iterator<Map.Entry<IObject,IObject>>	extractMapEntries(IObject collection) Extracts the contents of a map (i.e.
Integer	getCapacity(IObject collection) Return the capacity of the collection, if applicable
Double	getCollisionRatio(IObject coll) Calculates the collision ratio in the collection
Double	getFillRatio(IObject collection) Calculate the fill ration of a collection
Integer	getNumberOfNotNullElements(IObject collection) Returns the number of non-null elements in the collection.
Integer	getSize(IObject collection) Extract the size of the collection
boolean	hasCapacity() Check if the collection has capacity, e.g.
boolean	hasCollisionRatio() Check if the extractor can calculate collision ratio
boolean	hasExtractableArray() Return true if the collection array based and the array can be extracted from the heap dump
boolean	hasExtractableContents() Check if the collection has extractable contents
boolean	hasFillRatio() Check if fill ratio for the collection can be calculated, i.e.
boolean	hasSize() Check if the size of the collection can be extracted

Methods inherited from class java.lang.Object

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

Constructor Detail

SetFromCollectionExtractor

public SetFromCollectionExtractor(ICollectionExtractor ex)

SetFromCollectionExtractor

public SetFromCollectionExtractor(ICollectionExtractor ex,
                                  double collisionRatio)

Method Detail

hasCollisionRatio

public boolean hasCollisionRatio()

Description copied from interface: IMapExtractor

Check if the extractor can calculate collision ratio

Specified by:

hasCollisionRatio in interface IMapExtractor

Returns:

getCollisionRatio

public Double getCollisionRatio(IObject coll)
                         throws SnapshotException

Description copied from interface: IMapExtractor

Calculates the collision ratio in the collection

Specified by:

getCollisionRatio in interface IMapExtractor

Returns:

Double number of elements with colliding keys / size

Throws:

SnapshotException

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

hasSize

public boolean hasSize()

Description copied from interface: ICollectionExtractor

Check if the size of the collection can be extracted

Specified by:

hasSize in interface ICollectionExtractor

Returns:

getSize

public Integer getSize(IObject collection)
                throws SnapshotException

Description copied from interface: ICollectionExtractor

Extract the size of the collection

Specified by:

getSize in interface ICollectionExtractor

Returns:

Throws:

SnapshotException

hasCapacity

public boolean hasCapacity()

Description copied from interface: ICollectionExtractor

Check if the collection has capacity, e.g. ArrayList

Specified by:

hasCapacity in interface ICollectionExtractor

Returns:

getCapacity

public Integer getCapacity(IObject collection)
                    throws SnapshotException

Description copied from interface: ICollectionExtractor

Return the capacity of the collection, if applicable

Specified by:

getCapacity in interface ICollectionExtractor

Returns:

Throws:

SnapshotException

hasFillRatio

public boolean hasFillRatio()

Description copied from interface: ICollectionExtractor

Check if fill ratio for the collection can be calculated, i.e. if it has some predefined capacity and actual size

Specified by:

hasFillRatio in interface ICollectionExtractor

Returns:

getFillRatio

public Double getFillRatio(IObject collection)
                    throws SnapshotException

Description copied from interface: ICollectionExtractor

Calculate the fill ration of a collection

Specified by:

getFillRatio in interface ICollectionExtractor

Returns:

Throws:

SnapshotException

hasExtractableContents

public boolean hasExtractableContents()

Description copied from interface: ICollectionExtractor

Check if the collection has extractable contents

Specified by:

hasExtractableContents in interface ICollectionExtractor

Returns:

extractEntryIds

public int[] extractEntryIds(IObject collection)
                      throws SnapshotException

Description copied from interface: ICollectionExtractor

Returns the object ids (int) for all objects which are contained in the collection

Specified by:

extractEntryIds in interface ICollectionExtractor

Returns:

Throws:

SnapshotException

hasExtractableArray

public boolean hasExtractableArray()

Description copied from interface: ICollectionExtractor

Return true if the collection array based and the array can be extracted from the heap dump

Specified by:

hasExtractableArray in interface ICollectionExtractor

Returns:

extractEntries

public IObjectArray extractEntries(IObject collection)
                            throws SnapshotException

Description copied from interface: ICollectionExtractor

Extracts the array containing the collection content

Specified by:

extractEntries in interface ICollectionExtractor

Returns:

Throws:

SnapshotException

getNumberOfNotNullElements

public Integer getNumberOfNotNullElements(IObject collection)
                                   throws SnapshotException

Description copied from interface: ICollectionExtractor

Returns the number of non-null elements in the collection. Requires hasExtractableContents or hasExtractableArray

Specified by:

getNumberOfNotNullElements in interface ICollectionExtractor

Returns:

Throws:

SnapshotException