[cp-patches] FYI: Emulate Vector.setSize() in MessageFormat

[Andrew John Hughes]

ArrayList has no equivalent of Vector.setSize() which pads
a collection to a specified size.  MessageFormat was relying on this
behaviour to produce a sparsely-populated results array (filling
only the specified slots using set rather than appending to the end).
We emulate it by simply looping until the specified size is achieved
by adding null values to the end.

ChangeLog:

2008-12-31  Andrew John Hughes  <gnu_and...@member.fsf.org>

        * java/text/MessageFormat.java:
        (parse(String,ParsePosition)): Emulate behaviour
        of Vector's setSize() which was being implicitly relied on.
-- 
Andrew :)

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Index: java/text/MessageFormat.java
===================================================================
RCS file: /sources/classpath/classpath/java/text/MessageFormat.java,v
retrieving revision 1.28
diff -u -u -r1.28 MessageFormat.java
--- java/text/MessageFormat.java        31 Dec 2008 08:27:25 -0000      1.28
+++ java/text/MessageFormat.java        31 Dec 2008 11:14:47 -0000
@@ -686,7 +686,12 @@
          }
 
        if (elements[i].argNumber >= results.size())
-         results.ensureCapacity(elements[i].argNumber + 1);
+         {
+           // Emulate padding behaviour of Vector.setSize() with ArrayList
+           results.ensureCapacity(elements[i].argNumber + 1);
+           for (int a = results.size(); a <= elements[i].argNumber; ++a)
+             results.add(a, null);
+         }
        results.set(elements[i].argNumber, value);
 
        index += elements[i].trailer.length();