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https://issues.apache.org/jira/browse/VELTOOLS-109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12649596#action_12649596
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Nathan Bubna commented on VELTOOLS-109:
---------------------------------------
of course, you could just do one of these:
context.put("String", ""); || <tool key="String" class="java.lang.String"/> ||
#set( $String = '' )
and then do $String.format("the arg is %s", $arg)
Still... i suppose it wouldn't be a trivial thing to add a
printf(String,Object...) method to DisplayTool, just so people don't need to do
one of the first steps.
p.s. the upcoming Velocity 1.6 does support varargs. :)
> A PrinftTool comes in handy. I've one I wish to donate
> -------------------------------------------------------
>
> Key: VELTOOLS-109
> URL: https://issues.apache.org/jira/browse/VELTOOLS-109
> Project: Velocity Tools
> Issue Type: Improvement
> Components: GenericTools
> Affects Versions: 1.4, 2.0
> Environment: JDK 1.5, 6
> Reporter: Ezra Epstein
> Priority: Minor
> Fix For: 1.4, 2.0
>
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> import java.io.ByteArrayOutputStream;
> import java.io.PrintStream;
> import java.io.PrintWriter;
> import java.io.StringWriter;
> import java.util.List;
> public class PrintfTool extends
> org.apache.velocity.tools.generic.LocaleConfig {
> StringWriter output;
> PrintWriter printer;
> public PrintfTool() {
> output = new StringWriter();
> printer = new PrintWriter(output);
> }
> // Velocity doesn't support invoking with varargs
> private String printf(String format, Object... args) {
> printer.printf(format, args);
> printer.flush();
> output.flush();
> String result = output.toString();
> output.getBuffer().setLength(0);
> return result;
> }
> // Velocity does support invoking with a List of values.
> public String printf(String format, List args) {
> return printf(format, args.toArray());
> }
> // Since value convenience method
> public String printf(String format, Object arg) {
> return printf(format, new Object[] { arg });
> }
> }
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