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I think I’m missing something. Why wouldn’t you just;
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<div><font face="Consolas">import java.lang.StringTemplate.Processor;<br>
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<div><font face="Consolas">Processor<URL, RuntimeException> urlEncode = template -> URLEncoder.encode(template.interpolate(), UTF_8));</font></div>
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<div><font face="Consolas">Processor<String, RuntimeException> CSV = template -> StringEscapeUtils.<a href="https://commons.apache.org/proper/commons-lang/apidocs/src-html/org/apache/commons/lang3/StringEscapeUtils.html#line.768" style="caret-color: rgb(53, 56, 51); font-size: 14px; background-color: rgb(255, 255, 255); text-decoration: none; color: rgb(74, 103, 130);">escapeCsv</a>(template.interpolate());<br>
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<div>On Oct 26, 2023, at 4:47 PM, Rob Spoor <openjdk@icemanx.nl> wrote:</div>
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<div>I've been reading up on string templates, and I think it's a very cool feature. However, writing a custom processor can be a lot of copy-paste work if you want STR but with some extra translation applied. For instance, if I'd want to have a URL encoding
processor I would have to write everything from scratch.<br>
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I think it would be useful to overload interpolate (both static and non-static) with a custom Function<Object, String> as additional arguments. This would work like STR if that provided String::valueOf as function.<br>
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With this method, creating a URL encoding processor would be as simple as this:<br>
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var urlEncode = template -> template.interpolate(o -><br>
URLEncoder.encode(String.valueOf(o), UTF_8));<br>
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var url = urlEncode."https://host/path/\{id}?param=\{value\}";<br>
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Likewise, a processor backed by Apache Commons Text's StringEscapeUtils would now be just as simple:<br>
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var CSV = template -> template.interpolate(o -><br>
StringEscapeUtils.ESCAPE_CSV.translate(String.valueOf(o));<br>
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var csv = CSV."""<br>
Header1, Header2, Header3<br>
"\{value1}", "\{value2}", "\{value3}"<br>
""";<br>
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If the JVM allows it, the existing interpolate method can even delegate to the new overload providing String::valueOf.<br>
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