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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 18406] - nightly build script throws npe under some (common) conditions
Date Thu, 27 Mar 2003 12:50:08 GMT
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=18406

nightly build script throws npe under some (common) conditions





------- Additional Comments From peter.reilly@corvil.com  2003-03-27 12:50 -------
I did not know that id are resolved at parse
time, I always assumed that they are like
properties, one learns something new
about ant each day. :)

On further investigation, you are right about the
cause been interaction with UnknownElement.

changing 
Project$AntRefTable#get(Object key)

to
            boolean doprint = "xmlpath".equals(key);
            if (doprint)
                System.out.println("AntRefTable.get " + key);
            Object o = super.get(key);
            if (doprint)
                System.out.println("got " + o);
            if (o instanceof UnknownElement) {
                if (doprint)
                    System.out.println("It is a UnknownElement");
                // Make sure that
                ((UnknownElement) o).maybeConfigure();
                o = ((UnknownElement) o).getTask();
                if (doprint)
                    System.out.println("after get task " + o);
                if (o == null) {
                    o = super.get(key);
                    if (doprint)
                        System.out.println("AFTER get again " + o);
                }
          }
            if (doprint)
                System.out.println(
                    "AntRefTable.get " + key + " return " + o);
            return o;

gives the following output
   [script] AntRefTable.get xmlpath
   [script] got org.apache.tools.ant.UnknownElement@b5f53a
   [script] It is a UnknownElement
   [script] after get task null
   [script] AFTER get again
/home/preilly/proj/learning/script/bizzare.xml:/home/preilly/proj/learning/script/build.xml
   [script] AntRefTable.get xmlpath return
/home/preilly/proj/learning/script/bizzare.xml:/home/preilly/proj/learning/script/build.xml
   [script] AntRefTable.get xmlpath
   [script] got
/home/preilly/proj/learning/script/bizzare.xml:/home/preilly/proj/learning/script/build.xml
   [script] AntRefTable.get xmlpath return
/home/preilly/proj/learning/script/bizzare.xml:/home/preilly/proj/learning/script/build.xml

BUILD SUCCESSFUL

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