org.eclipse.mat.internal.collectionextract

Class FieldSizedCollectionExtractor

java.lang.Object

org.eclipse.mat.internal.collectionextract.FieldSizedCollectionExtractor

All Implemented Interfaces:

ICollectionExtractor

Direct Known Subclasses:

LinkedListCollectionExtractor

public class FieldSizedCollectionExtractor
extends Object
implements ICollectionExtractor

Constructor Summary

Constructors

Constructor and Description
FieldSizedCollectionExtractor(String sizeField)

Method Summary

Modifier and Type	Method and Description
IObjectArray	extractEntries(IObject coll) Extracts the array containing the collection content
int[]	extractEntryIds(IObject coll) Returns the object ids (int) for all objects which are contained in the collection
Integer	getCapacity(IObject coll) Return the capacity of the collection, if applicable
Double	getFillRatio(IObject coll) Calculate the fill ration of a collection
Integer	getNumberOfNotNullElements(IObject collection) Returns the number of non-null elements in the collection.
Integer	getSize(IObject coll) Extract the size of the collection
boolean	hasCapacity() Check if the collection has capacity, e.g.
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

FieldSizedCollectionExtractor

public FieldSizedCollectionExtractor(String sizeField)

Method Detail

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 coll)
                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 coll)
                    throws SnapshotException

Description copied from interface: ICollectionExtractor

Return the capacity of the collection, if applicable

Specified by:

getCapacity 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 coll)
                      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 coll)
                            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

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 coll)
                    throws SnapshotException

Description copied from interface: ICollectionExtractor

Calculate the fill ration of a collection

Specified by:

getFillRatio in interface ICollectionExtractor

Returns:

Throws:

SnapshotException