CODEWITHSUNDEEP
groovy
AbuMariam
AbuMariam

Reputation: 3678

Groovy equivalent of Java's String.format

The below Java code gives errors in Groovy..

  private String getSignature() {
    String timestamp = getUTCTimestamp();
    String nonce = getNonce();
    String digest = getPasswordDigest(nonce, timestamp);

    return String.format(
            "UsernameToken Username=\\"%s\\", PasswordDigest=\\"%s\\", Nonce=\\"%s\\", Created=\\"%s\\"", apiUsername, digest, nonce, timestamp);
}

Specifically the String.format line, how to re-write in Groovy?

Upvotes: 2

Views: 3382

Answers (2)

Nathan Hughes
Nathan Hughes

Reputation: 96434

You can use GroovyStrings in preference to String.format or string concatenation; GroovyStrings let you interpolate variables into the body of the string, as described in the documentation:

Any Groovy expression can be interpolated in all string literals, apart from single and triple single quoted strings. Interpolation is the act of replacing a placeholder in the string with its value upon evaluation of the string. The placeholder expressions are surrounded by ${} or prefixed with $ for dotted expressions. The expression value inside the placeholder is evaluated to its string representation when the GString is passed to a method taking a String as argument by calling toString() on that expression.

There are multiple ways to delimit string literals, you can avoid having to escape the double-quotes by picking a different delimiting syntax, such as dollar-slashy, slashy, or triple-double-quoted.

Btw in Groovy you don't need the semicolons, and you need to use return explicitly only if you're returning early from the method:

String getSignature() {
    String timestamp = getUTCTimestamp()
    String nonce = getNonce()
    String digest = getPasswordDigest(nonce, timestamp)

    $/UsernameToken Username="${apiUsername}", PasswordDigest="${digest}", Nonce="${nonce}", Created="${timestamp}"/$
}

Upvotes: 1

tim_yates
tim_yates

Reputation: 171154

Should be able to do

private String getSignature() {
    String timestamp = getUTCTimestamp();
    String nonce = getNonce();
    String digest = getPasswordDigest(nonce, timestamp);

    "UsernameToken Username=\"$apiUsername\", PasswordDigest=\"$digest\", Nonce=\"$nonce\", Created=\"$timestamp\""
}

Upvotes: 1

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