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  1. Commons Collections
  2. COLLECTIONS-270

Proposal for a new List implementation: BackedList

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    Details

    • Type: New Feature
    • Status: Closed
    • Priority: Major
    • Resolution: Won't Fix
    • Affects Version/s: 3.2
    • Fix Version/s: None
    • Component/s: List
    • Labels:
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      Description

      Here is a new List implementation named BackedList, to use for transparently accessing values of a generic data source as it were a normal List.
      This List implementation dynamically accesses data source values through a proper strategy object, keeping in memory only a limited, configurable, buffer of values.
      So, it is useful for:
      1) Providing a List-like view of different data source values.
      2) Avoiding to pre-load all values in a standard list, providing better performances and less memory consumption.

      As a side note, this list implementation is already used in production for implementing pagination over a relational data source.

        Attachments

        1. DataAccessStrategy.java
          0.8 kB
          Sergio Bossa
        2. BackedListTest.java
          11 kB
          Sergio Bossa
        3. BackedList.java
          9 kB
          Sergio Bossa

          Activity

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            • Assignee:
              Unassigned
              Reporter:
              sbtourist Sergio Bossa
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              • Created:
                Updated:
                Resolved: