Class DoubleMemoryDataStorage

java.lang.Object
org.apfloat.spi.DataStorage
org.apfloat.internal.DoubleMemoryDataStorage
All Implemented Interfaces:
Serializable

public class DoubleMemoryDataStorage extends DataStorage
Memory based data storage implementation for the double element type.
Version:
1.9.0
Author:
Mikko Tommila
See Also:
  • Constructor Details

    • DoubleMemoryDataStorage

      public DoubleMemoryDataStorage()
      Default constructor.
    • DoubleMemoryDataStorage

      protected DoubleMemoryDataStorage(DoubleMemoryDataStorage doubleMemoryDataStorage, long offset, long length)
      Subsequence constructor.
      Parameters:
      doubleMemoryDataStorage - The originating data storage.
      offset - The subsequence starting position.
      length - The subsequence length.
  • Method Details

    • isCached

      public boolean isCached()
      Description copied from class: DataStorage
      Is this object cached in memory.
      Specified by:
      isCached in class DataStorage
      Returns:
      true if this object is cached in memory, false if not.
    • implSubsequence

      protected DataStorage implSubsequence(long offset, long length) throws ApfloatRuntimeException
      Description copied from class: DataStorage
      Implementation of getting a subsequence of this data storage. The validity of the arguments of this method do not need to be checked.
      Specified by:
      implSubsequence in class DataStorage
      Parameters:
      offset - The subsequence starting position.
      length - The subsequence length.
      Returns:
      Data storage that represents the specified part of this data storage.
      Throws:
      ApfloatRuntimeException
    • implCopyFrom

      protected void implCopyFrom(DataStorage dataStorage, long size) throws ApfloatRuntimeException
      Description copied from class: DataStorage
      Copies the specified number of elements from another data storage to this data storage. The validity of the arguments of this method do not need to be checked.
      Specified by:
      implCopyFrom in class DataStorage
      Parameters:
      dataStorage - The data storage where the data should be copied from.
      size - The number of elements to be copied.
      Throws:
      ApfloatRuntimeException
    • implGetSize

      protected long implGetSize()
      Description copied from class: DataStorage
      Return the size of the whole data storage, not including sub-sequence settings.
      Specified by:
      implGetSize in class DataStorage
      Returns:
      The size of the whole data storage, not including sub-sequence settings.
    • implSetSize

      protected void implSetSize(long size) throws ApfloatRuntimeException
      Description copied from class: DataStorage
      Sets the size of the data storage. The validity of the arguments of this method do not need to be checked.
      Specified by:
      implSetSize in class DataStorage
      Parameters:
      size - The size of the data storage.
      Throws:
      ApfloatRuntimeException
    • implGetArray

      protected ArrayAccess implGetArray(int mode, long offset, int length) throws ApfloatRuntimeException
      Description copied from class: DataStorage
      Gets an array access to the data of this data storage when it is treated as a linear block. The validity of the arguments of this method do not need to be checked.
      Specified by:
      implGetArray in class DataStorage
      Parameters:
      mode - Access mode for the array access: DataStorage.READ, DataStorage.WRITE or both.
      offset - Starting position of the array access in the data storage.
      length - Number of accessible elements in the array access.
      Returns:
      The array access.
      Throws:
      ApfloatRuntimeException
    • implGetArray

      protected ArrayAccess implGetArray(int mode, int startColumn, int columns, int rows) throws ApfloatRuntimeException
      Description copied from class: DataStorage
      Maps a block of data to a memory array when the data is treated as a matrix. The validity of the arguments of this method do not need to be checked.
      Specified by:
      implGetArray in class DataStorage
      Parameters:
      mode - Whether the array is prepared for reading, writing or both. The value should be DataStorage.READ, DataStorage.WRITE or a combination of these.
      startColumn - The starting column where data is read.
      columns - The number of columns of data to read.
      rows - The number of rows of data to read. This should be equivalent to n1, number of rows in the matrix.
      Returns:
      Access to an array of size columns x rows containing the data.
      Throws:
      ApfloatRuntimeException
    • implGetTransposedArray

      protected ArrayAccess implGetTransposedArray(int mode, int startColumn, int columns, int rows) throws ApfloatRuntimeException
      Description copied from class: DataStorage
      Maps a transposed block of data to a memory array when the data is treated as a matrix. The validity of the arguments of this method do not need to be checked.
      Specified by:
      implGetTransposedArray in class DataStorage
      Parameters:
      mode - Whether the array is prepared for reading, writing or both. The value should be DataStorage.READ, DataStorage.WRITE or a combination of these.
      startColumn - The starting column where data is read.
      columns - The number of columns of data to read.
      rows - The number of rows of data to read. This should be equivalent to n1, number of rows in the matrix.
      Returns:
      Access to an array of size columns x rows containing the transposed data.
      Throws:
      ApfloatRuntimeException
    • iterator

      public DataStorage.Iterator iterator(int mode, long startPosition, long endPosition) throws IllegalArgumentException, IllegalStateException, ApfloatRuntimeException
      Description copied from class: DataStorage
      Constructs a new iterator. Elements can be iterated either in forward or in reverse order, depending on if startPosition is less than or greater than endPosition, correspondingly.
      Specified by:
      iterator in class DataStorage
      Parameters:
      mode - Access mode for iterator: DataStorage.READ, DataStorage.WRITE or both.
      startPosition - Starting position of iterator in the data set. For reverse access, the first element in the iterator is startPosition - 1.
      endPosition - End position of iterator in the data set. For forward access, the last accessible element in the iterator is endPosition - 1.
      Returns:
      An iterator.
      Throws:
      IllegalArgumentException - If the requested area is out of bounds of the data storage.
      IllegalStateException - If write access is requested for a read-only data storage.
      ApfloatRuntimeException