Package org.eclipse.mat.internal.collectionextract

Class MATArrayBig

java.lang.Object

org.eclipse.mat.internal.collectionextract.FieldSizedCollectionExtractor

org.eclipse.mat.internal.collectionextract.MATArrayBig

All Implemented Interfaces:

ICollectionExtractor

public class MATArrayBig
extends FieldSizedCollectionExtractor

Constructor Summary

Constructors

Constructor	Description
MATArrayBig(String sizeField, String pagesField)

Method Summary

Modifier and Type	Method	Description
Integer	getCapacity(IObject coll)	Return the capacity of the collection, if applicable
Double	getFillRatio(IObject coll)	Calculate the fill ratio of a 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.

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

extractEntries, extractEntryIds, getNumberOfNotNullElements, getSize, hasSize

Methods inherited from class java.lang.Object

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

Constructor Details

MATArrayBig

public MATArrayBig(String sizeField,
 String pagesField)

Method Details

hasCapacity

public boolean hasCapacity()

Description copied from interface: ICollectionExtractor

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

Specified by:

hasCapacity in interface ICollectionExtractor

Overrides:

hasCapacity in class FieldSizedCollectionExtractor

Returns:

true if ICollectionExtractor.getCapacity(IObject) could be called

See Also:

• ICollectionExtractor.getCapacity(IObject)

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 FieldSizedCollectionExtractor

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()

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

Overrides:

hasFillRatio in class FieldSizedCollectionExtractor

Returns:

true if ICollectionExtractor.getFillRatio(IObject) could be called

See Also:

• ICollectionExtractor.getFillRatio(IObject)

getFillRatio

public Double getFillRatio(IObject coll)
                    throws SnapshotException

Description copied from interface: ICollectionExtractor

Calculate the fill ratio of a collection

Specified by:

getFillRatio in interface ICollectionExtractor

Overrides:

getFillRatio in class FieldSizedCollectionExtractor

Parameters:

coll - - the collection to find the fill ratio of

Returns:

the fill ratio, between 0.0 and 1.0, or null if unavailable

Throws:

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

See Also:

• ICollectionExtractor.hasFillRatio()

hasExtractableContents

public boolean hasExtractableContents()

Description copied from interface: ICollectionExtractor

Check if the collection has extractable contents

Specified by:

hasExtractableContents in interface ICollectionExtractor

Overrides:

hasExtractableContents in class FieldSizedCollectionExtractor

Returns:

true if ICollectionExtractor.extractEntryIds(IObject) could be called

See Also:

• ICollectionExtractor.extractEntryIds(IObject)

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

Overrides:

hasExtractableArray in class FieldSizedCollectionExtractor

Returns:

true if ICollectionExtractor.extractEntries(IObject) could be called

See Also:

• ICollectionExtractor.extractEntries(IObject)