Package de.lmu.ifi.dbs.elki.utilities

Utility and helper classes - commonly used data structures, output formatting, exceptions, ...

See: Description

Class Summary

Class	Description
BitsUtil	Utilities for bit operations.
ClassGenericsUtil	Utils for handling class instantiation especially with respect to Java generics.
DatabaseUtil	Class with Database-related utility functions such as centroid computation, covariances etc.
ELKIServiceLoader	Class that emulates the behavior of an java ServiceLoader, except that the classes are not automatically instantiated.
ELKIServiceRegistry	Registry of available implementations in ELKI.
ELKIServiceRegistry.Entry	Entry in the service registry.
ELKIServiceScanner	A collection of inspection-related utility functions.
ELKIServiceScanner.ClassSorter	Sort classes by their class name.
ELKIServiceScanner.DirClassIterator	Class to iterate over a directory tree.
FileUtil	Various static helper methods to deal with files and file names.
FormatUtil	Utility methods for output formatting of various number objects
HandlerList<H>	Manages a list of handlers for objects.
Util	This class collects various static helper methods.
Util.ForwardComparator	Regular comparator.

Annotation Types Summary

Annotation Type	Description
Alias	This interface defines alias names for classes.

Package de.lmu.ifi.dbs.elki.utilities Description

Utility and helper classes - commonly used data structures, output formatting, exceptions, ...

Specialized utility classes (which often collect static utility methods only) can be found in other places of ELKI as well, as seen below.

Important utility function collections:

• Basic and low-level:
  • Util: Miscellaneous utility functions.
  • LoggingUtil: simple logging access.
  • MathUtil: Mathematics utility functions.
  • VectorUtil: Vector and Matrix functions.
  • SpatialUtil: Spatial MBR computations (intersection, union etc.).
  • ByteArrayUtil: byte array processing (low-level IO via byte arrays).
  • FileUtil: File and file name utility functions.
  • ClassGenericsUtil: Generic classes (instantiation, arrays of arrays, sets that require safe but unchecked casts).
• Database-related:
  • TypeUtil: Data type utility functions and common type definitions.
  • QueryUtil: Database Query API simplifications.
  • DBIDUtil: Database ID DBID handling.
  • DataStoreUtil: Data storage layer (like Maps).
  • DatabaseUtil: database utility functions (centroid etc.).
  • ResultUtil: result processing functions (e.g. extracting sub-results).
• Output-related:
  • FormatUtil: output formatting.
  • HTMLUtil: HTML (with XML DOM) generation.
  • SVGUtil: SVG generation (XML DOM based).
  • BatikUtil: Apache Batik SVG utilities (coordinate transforms screen to canvas).
• Specialized:
  • OptionUtil: Managing parameter settings
  • ELKIServiceRegistry: class and classpath inspection.
  • DocumentationUtil: documentation extraction from annotations.
  • RStarTreeUtil: reporting page file accesses.