RFR: 8231640: (prop) Canonical property storage [v14]

[Daniel Fuchs]

On Tue, 14 Sep 2021 13:24:55 GMT, Jaikiran Pai <jpai at openjdk.org> wrote:

>> src/java.base/share/classes/java/util/Properties.java line 822:
>> 
>>> 820:      * {@link System#lineSeparator() line separator} and if the next
>>> 821:      * character in comments is not character {@code #} or character {@code !} then
>>> 822:      * an ASCII {@code #} is written out after that line separator.
>> 
>> Should something be done for comments ending with \ (backslash) ? It might otherwise suppress the first property assignment that follows.
>
> There has been no change in how we deal with this aspect. The existing specification (stated in the `load` method) says:
> 
> 
>>     * Properties are processed in terms of lines. There are two
>>     * kinds of line, <i>natural lines</i> and <i>logical lines</i>.
>>     * A natural line is defined as a line of
>>     * characters that is terminated either by a set of line terminator
>>     * characters ({@code \n} or {@code \r} or {@code \r\n})
>>     * or by the end of the stream. A natural line may be either a blank line,
>>     * a comment line, or hold all or some of a key-element pair. A logical
>>     * line holds all the data of a key-element pair, which may be spread
>>     * out across several adjacent natural lines by escaping
>>     * the line terminator sequence with a backslash character
>>     * {@code }.  **Note that a comment line cannot be extended
>>     * in this manner;**
> (emphasis on that last sentence).
> I'll anyway go ahead and add new tests around this to be sure that this works as advertised.

Oh - great - thanks - verifying by a test that it also applies to the comment specified by `java.util.Properties.storeDate` would be good.

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PR: https://git.openjdk.java.net/jdk/pull/5372