Class MultiplePathsFromGCRootsRecord


  • public class MultiplePathsFromGCRootsRecord
    extends java.lang.Object
    This class represents a set of paths from the GC roots to different objects, which go through one and the same object.
    • Constructor Detail

      • MultiplePathsFromGCRootsRecord

        public MultiplePathsFromGCRootsRecord​(int objectId,
                                              int level,
                                              ISnapshot snapshot)
        A constructor to create the record
        Parameters:
        objectId - - the ID of the object which is common for all the paths
        level - - the level (depth) in the paths where this objects appears
        snapshot - - an ISnapshot object used for further calculation
    • Method Detail

      • getReferencedRetainedSize

        public long getReferencedRetainedSize()
        Get the total retained heap size of the referenced objects
      • setReferencedRetainedSize

        public void setReferencedRetainedSize​(long referencedRetainedSize)
        Set the retained heap size of the referenced objects
      • nextLevel

        public MultiplePathsFromGCRootsRecord[] nextLevel()
        Returns the next level of the paths. For all paths going through this object the next objects in the paths are taken and grouped again (i.e. the lenght of the returned array will be equal to the number of different objects at the next depth level of the paths). The direction is from the GC roots to the objects
        Returns:
        MultiplePathsFromGCRootsRecord[] Each record in the result represents again paths going through one and the same object
      • addPath

        public void addPath​(int[] path)
        This method is used only when the record is built. Adds one path to the set of paths
        Parameters:
        path -
      • getPaths

        public java.util.List<int[]> getPaths()
        Get all the paths going through the object (getObjectId())
        Returns:
        List<int[]> each element in the list is an int[] representing a path
      • getObjectId

        public int getObjectId()
        Get the id of the object which is common for all the paths
      • getCount

        public int getCount()
        Get the number of paths going through this object
      • getLevel

        public int getLevel()
        Get the level of this record
      • getReferencedObjects

        public int[] getReferencedObjects()
        Get the "end" objects for each path. This is equal to getting all the paths and looking at their element [0]
        Returns:
        - an array with all the objects at the end of the paths
      • getReferencedHeapSize

        public long getReferencedHeapSize()
                                   throws SnapshotException
        Get the total net heap size of all referenced objects (see getReferencedObjects())
        Returns:
        - the total heap size of all referenced objects
        Throws:
        SnapshotException
      • getComparatorByNumberOfReferencedObjects

        public static java.util.Comparator<MultiplePathsFromGCRootsRecord> getComparatorByNumberOfReferencedObjects()
        Returns a Comparator ordering the records descending by the number of referenced objects.
      • getComparatorByReferencedHeapSize

        public static java.util.Comparator<MultiplePathsFromGCRootsRecord> getComparatorByReferencedHeapSize()
        Returns a Comparator ordering the records descending by the total size of referenced objects.
      • getComparatorByReferencedRetainedSize

        public static java.util.Comparator<MultiplePathsFromGCRootsRecord> getComparatorByReferencedRetainedSize()
        Returns a Comparator ordering the records descending by the total size of referenced objects.