Class ClassHistogramRecord

    • Constructor Detail

      • ClassHistogramRecord

        public ClassHistogramRecord​(String label,
                                    int classId,
                                    long numberOfObjects,
                                    long usedHeapSize,
                                    long retainedHeapSize)
        Build a histogram record
        Parameters:
        label - the class name
        classId - the id of the class
        numberOfObjects - the number of objects of that class
        usedHeapSize - the space used by those objects
        retainedHeapSize - the total of the size of all the objects retained by those objects. 0 means calculate when required, negative means approximate size, positive means exact retained size is known.
      • ClassHistogramRecord

        public ClassHistogramRecord​(String label,
                                    int classId,
                                    int[] objectIds,
                                    long usedHeapSize,
                                    long retainedHeapSize)
        Build a histogram record
        Parameters:
        label - the class name
        classId - the id of the class
        objectIds - the ids of objects of that class
        usedHeapSize - the space used by those objects
        retainedHeapSize - the total of the size of all the objects retained by those objects. 0 means calculate when required, negative means approximate size, positive means exact retained size is known.
    • Method Detail

      • getClassId

        public int getClassId()
        Get id of the class this class histogram record stands for.
        Returns:
        id of the class this class histogram record stands for
      • getObjectIds

        public int[] getObjectIds()
        Get ids of the objects this class histogram record stands for.
        Returns:
        ids of the objects this class histogram record stands for
      • calculateRetainedSize

        public long calculateRetainedSize​(ISnapshot snapshot,
                                          boolean calculateIfNotAvailable,
                                          boolean approximation,
                                          IProgressListener listener)
                                   throws SnapshotException
        Find out the retained size
        Parameters:
        snapshot - the snapshot
        calculateIfNotAvailable - whether to calculate the size if not already available
        approximation - whether to use an approximation to the retained size (sum of the individual retained sizes)
        listener - to report progress and errors
        Returns:
        the retained size, negated if approximate, 0 if not available
        Throws:
        SnapshotException