org.eclipse.mat.internal.collectionextract
Class EmptyMapExtractor

java.lang.Object
  extended by org.eclipse.mat.internal.collectionextract.EmptyCollectionExtractor
      extended by org.eclipse.mat.internal.collectionextract.EmptyMapExtractor
All Implemented Interfaces:
ICollectionExtractor, IMapExtractor

public class EmptyMapExtractor
extends EmptyCollectionExtractor
implements IMapExtractor


Nested Class Summary
 
Nested classes/interfaces inherited from interface org.eclipse.mat.inspections.collectionextract.IMapExtractor
IMapExtractor.EntryObject
 
Constructor Summary
EmptyMapExtractor()
           
 
Method Summary
 Iterator<Map.Entry<IObject,IObject>> extractMapEntries(IObject collection)
          Extracts the contents of a map (i.e.
 Double getCollisionRatio(IObject collection)
          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.EmptyCollectionExtractor
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 Detail

EmptyMapExtractor

public EmptyMapExtractor()
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 collection)
                         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)
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