RFR: 8303530: Add system property for custom JAXP configuration file [v2]

[Joe Wang]

On Mon, 13 Mar 2023 10:03:52 GMT, Alan Bateman <alanb at openjdk.org> wrote:

>> Joe Wang has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   clean up tests; fix copy&paste error.
>
> src/java.xml/share/classes/javax/xml/catalog/CatalogFeatures.java line 183:
> 
>> 181:  * <a href="../../../module-summary.html#ConfigurationFile">configuration file</a>.
>> 182:  * In case of multiple interfaces, the latest in a procedure shall take preference.
>> 183:  * For {@link Feature#FILES}, this means that the URI(s) specified through the methods
> 
> "multiple interfaces" and "the latest in a procedure" aren't very clear here. If the setup for this section documents the precedence order more clearly then it will make it easier to word this section.

We have two options here:
    - drop the discussion about "multiple interfaces", and leave it to the CatalogManager to make it clear;
    - add some sample code 
    
While we'll be adding a general Scope and Order, this is specific to the Catalog API. I'll try option 1.

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PR: https://git.openjdk.org/jdk/pull/12985