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VA Technical Reference Model v 24.7

Apache Commons Collections
Apache Commons Collections Technology

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Technologies must be operated and maintained in accordance with Federal and Department security and privacy policies and guidelines. More information on the proper use of the TRM can be found on the TRM Proper Use Tab/Section.

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Description: The Apache Commons Collections is a project used to develop and maintain a collection of classes based on and inspired by the Java Development Kit (JDK) collection framework. This group of collections includes features such as:
  • Bag interfaces for collections that have a number of copies of each object.
  • BidiMap interfaces for maps that can be looked up from value to key and key to value.
  • MapIterator interfaces to provide simple and quick iteration over maps.
  • Transforming decorators that alter each object as it is added to the collection.
  • Composite collections that make multiple collections look like one.
  • Ordered maps and sets that retain the order elements are added in, including a Least Recently Used (LRU) based map.
  • Reference maps that allow keys and/or values to be garbage collected under close control.
  • Utilities to test or create typical set-theory properties of collections such as union, intersection, and closure.


This technology does not utilize a database.
Technology/Standard Usage Requirements: Users must ensure their use of this technology/standard is consistent with VA policies and standards, including, but not limited to, VA Handbooks 6102 and 6500; VA Directives 6004, 6513, and 6517; and National Institute of Standards and Technology (NIST) standards, including Federal Information Processing Standards (FIPS). Users must ensure sensitive data is properly protected in compliance with all VA regulations. Prior to use of this technology, users should check with their supervisor, Information Security Officer (ISO), Facility Chief Information Officer (CIO), or local Office of Information and Technology (OI&T) representative to ensure that all actions are consistent with current VA policies and procedures prior to implementation.
Section 508 Information: This technology has not been assessed by the Section 508 Office. The Implementer of this technology has the responsibility to ensure the version deployed is 508-compliant. Section 508 compliance may be reviewed by the Section 508 Office and appropriate remedial action required if necessary. For additional information or assistance regarding Section 508, please contact the Section 508 Office at Section508@va.gov.
Decision: View Decisions
Decision Source: TRM Mgmt Group
Decision Process: One-VA TRM v22.8
Decision Date: 08/31/2022 at 02:18:57 UTC
Introduced By: TRM Request
Vendor Name: Apache Software Foundation (ASF)
- The information contained on this page is accurate as of the Decision Date (08/31/2022 at 02:18:57 UTC).