io.cucumber.core.snippets.FunctionNameGenerator Maven / Gradle / Ivy
package io.cucumber.core.snippets;
final class FunctionNameGenerator {
private static final Character SUBST = ' ';
private final Joiner joiner;
FunctionNameGenerator(Joiner joiner) {
this.joiner = joiner;
}
String generateFunctionName(String sentence) {
sentence = removeIllegalCharacters(sentence);
sentence = sentence.trim();
String[] words = sentence.split("\\s");
return joiner.concatenate(words);
}
private String removeIllegalCharacters(String sentence) {
if (sentence.isEmpty()) {
throw new IllegalArgumentException("Cannot create function name from empty sentence");
}
StringBuilder sanitized = new StringBuilder();
sanitized.append(Character.isJavaIdentifierStart(sentence.charAt(0)) ? sentence.charAt(0) : SUBST);
for (int i = 1; i < sentence.length(); i++) {
if (Character.isJavaIdentifierPart(sentence.charAt(i))) {
sanitized.append(sentence.charAt(i));
} else if (sanitized.charAt(sanitized.length() - 1) != SUBST && i != sentence.length() - 1) {
sanitized.append(SUBST);
}
}
return sanitized.toString();
}
}