Uploaded image for project: 'Lucene - Core'
  1. Lucene - Core
  2. LUCENE-939

Check for boundary conditions in FieldInfos

    XMLWordPrintableJSON

    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Trivial
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.3
    • Component/s: None
    • Labels:
      None
    • Lucene Fields:
      New

      Description

      In FieldInfos there are three methods in which we don't check for
      boundary conditions but catch e. g. an IndexOutOfBoundsException
      or a NPE. I think this isn't good code style and is probably not
      even faster than checking explicitly.

      "Exceptions should not be used to alter the flow of a program as
      part of normal execution."

      Also this can be irritating when you're trying to debug an
      IndexOutOfBoundsException that is thrown somewhere else in your
      program and you place a breakpoint on that exception.

      The three methods are:

      public int fieldNumber(String fieldName) {
      try

      { FieldInfo fi = fieldInfo(fieldName); if (fi != null) return fi.number; }

      catch (IndexOutOfBoundsException ioobe)

      { return -1; }

      return -1;
      }

      public String fieldName(int fieldNumber) {
      try

      { return fieldInfo(fieldNumber).name; }

      catch (NullPointerException npe)

      { return ""; }

      }

      public FieldInfo fieldInfo(int fieldNumber) {
      try

      { return (FieldInfo) byNumber.get(fieldNumber); }

      catch (IndexOutOfBoundsException ioobe)

      { return null; }

      }

        Attachments

        1. lucene-939.patch
          1 kB
          Michael Busch

          Activity

            People

            • Assignee:
              michaelbusch Michael Busch
              Reporter:
              michaelbusch Michael Busch
            • Votes:
              0 Vote for this issue
              Watchers:
              1 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved: