Class SingletonMapExtractor
- java.lang.Object
-
- org.eclipse.mat.internal.collectionextract.SingletonMapExtractor
-
- All Implemented Interfaces:
ICollectionExtractor
,IMapExtractor
public class SingletonMapExtractor extends Object implements IMapExtractor
-
-
Nested Class Summary
-
Nested classes/interfaces inherited from interface org.eclipse.mat.inspections.collectionextract.IMapExtractor
IMapExtractor.EntryObject
-
-
Constructor Summary
Constructors Constructor Description SingletonMapExtractor(String keyField, String valueField)
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description IObjectArray
extractEntries(IObject coll)
Extracts the array containing the collection contentint[]
extractEntryIds(IObject coll)
Returns the object ids (int) for all objects which are contained in the collectionIterator<Map.Entry<IObject,IObject>>
extractMapEntries(IObject coll)
Extracts the contents of a map (i.e.Integer
getCapacity(IObject coll)
Return the capacity of the collection, if applicableDouble
getCollisionRatio(IObject coll)
Calculates the collision ratio in the collection.Double
getFillRatio(IObject coll)
Calculate the fill ratio of a collectionInteger
getNumberOfNotNullElements(IObject coll)
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
hasCollisionRatio()
Check if the extractor can calculate collision ratioboolean
hasExtractableArray()
Return true if the collection array based and the array can be extracted from the heap dumpboolean
hasExtractableContents()
Check if the collection has extractable contentsboolean
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.
-
-
-
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 interfaceICollectionExtractor
- Returns:
- true if
ICollectionExtractor.getSize(IObject)
could be called - See Also:
ICollectionExtractor.getSize(IObject)
-
getSize
public Integer getSize(IObject coll) throws SnapshotException
Description copied from interface:ICollectionExtractor
Extract the size of the collection.- Specified by:
getSize
in interfaceICollectionExtractor
- Parameters:
coll
- - the collection to find the size of- Returns:
- the size, or null if not available
- Throws:
SnapshotException
- if there is a problem retrieving data from the snapshot- See Also:
ICollectionExtractor.hasSize()
-
hasCapacity
public boolean hasCapacity()
Description copied from interface:ICollectionExtractor
Check if the collection has capacity, e.g. ArrayList- Specified by:
hasCapacity
in interfaceICollectionExtractor
- 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 interfaceICollectionExtractor
- 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()
-
hasExtractableContents
public boolean hasExtractableContents()
Description copied from interface:ICollectionExtractor
Check if the collection has extractable contents- Specified by:
hasExtractableContents
in interfaceICollectionExtractor
- Returns:
- true if
ICollectionExtractor.extractEntryIds(IObject)
could be called - See Also:
ICollectionExtractor.extractEntryIds(IObject)
-
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 interfaceICollectionExtractor
- Parameters:
coll
- - the collection to find the objects it holds- Returns:
- an array of ints which are the object ids.
- Throws:
SnapshotException
- if there is a problem retrieving data from the snapshot- See Also:
ICollectionExtractor.hasExtractableContents()
-
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 interfaceICollectionExtractor
- Returns:
- true if
ICollectionExtractor.extractEntries(IObject)
could be called - See Also:
ICollectionExtractor.extractEntries(IObject)
-
extractEntries
public IObjectArray extractEntries(IObject coll) throws SnapshotException
Description copied from interface:ICollectionExtractor
Extracts the array containing the collection content- Specified by:
extractEntries
in interfaceICollectionExtractor
- Parameters:
coll
- - the collection to find the object array holding its contents- Returns:
- the backing array for the collection
- Throws:
SnapshotException
- if there is a problem retrieving data from the snapshot- See Also:
ICollectionExtractor.hasExtractableArray()
-
getNumberOfNotNullElements
public Integer getNumberOfNotNullElements(IObject coll) 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 interfaceICollectionExtractor
- Parameters:
coll
- - the collection to find the number of non-null content objects- Returns:
- the number of non-null elements, or null if not available
- Throws:
SnapshotException
- See Also:
ICollectionExtractor.hasExtractableContents()
,ICollectionExtractor.hasExtractableArray()
-
hasCollisionRatio
public boolean hasCollisionRatio()
Description copied from interface:IMapExtractor
Check if the extractor can calculate collision ratio- Specified by:
hasCollisionRatio
in interfaceIMapExtractor
- 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 interfaceIMapExtractor
- 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) 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 interfaceIMapExtractor
- 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
- 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 interfaceICollectionExtractor
- 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 interfaceICollectionExtractor
- 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()
-
-