io.cucumber.cucumberexpressions.RegularExpression Maven / Gradle / Ivy
package io.cucumber.cucumberexpressions;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegularExpression implements Expression {
private static final Pattern CAPTURE_GROUP_PATTERN = Pattern.compile("\\((?!\\?:)([^(]+)\\)");
private final Pattern expressionRegexp;
private final ParameterTypeRegistry parameterTypeRegistry;
private TreeRegexp treeRegexp;
/**
* Creates a new instance. Use this when the transform types are not known in advance,
* and should be determined by the regular expression's capture groups. Use this with
* dynamically typed languages.
*
* @param expressionRegexp the regular expression to use
* @param parameterTypeRegistry used to look up parameter types
*/
public RegularExpression(Pattern expressionRegexp, ParameterTypeRegistry parameterTypeRegistry) {
this.expressionRegexp = expressionRegexp;
this.parameterTypeRegistry = parameterTypeRegistry;
treeRegexp = new TreeRegexp(expressionRegexp);
}
@Override
public List> match(String text) {
List> parameterTypes = new ArrayList<>();
Matcher matcher = CAPTURE_GROUP_PATTERN.matcher(expressionRegexp.pattern());
while (matcher.find()) {
String parameterTypeRegexp = matcher.group(1);
ParameterType parameterType = parameterTypeRegistry.lookupByRegexp(parameterTypeRegexp, expressionRegexp, text);
if (parameterType == null) {
parameterType = new ParameterType<>(
parameterTypeRegexp,
parameterTypeRegexp,
String.class,
new SingleTransformer<>(String::new)
);
}
parameterTypes.add(parameterType);
}
return Argument.build(treeRegexp, parameterTypes, text);
}
@Override
public Pattern getRegexp() {
return expressionRegexp;
}
@Override
public String getSource() {
return expressionRegexp.pattern();
}
}