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Cucumber Expressions are simple patterns for matching Step Definitions with Gherkin steps

There is a newer version: 18.0.1

package io.cucumber.cucumberexpressions;

import org.apiguardian.api.API;

import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;

@API(status = API.Status.STABLE)
public final class Argument {
    private final ParameterType parameterType;
    private final Group group;

    static List> build(Group group, List> parameterTypes) {
        List argGroups = group.getChildren();

        if (argGroups.size() != parameterTypes.size()) {
            // This requires regex injection through a Cucumber expression.
            // Regex injection should be be possible any more.
            throw new IllegalArgumentException(String.format("Group has %s capture groups, but there were %s parameter types", argGroups.size(), parameterTypes.size()));
        }
        List> args = new ArrayList<>(argGroups.size());
        for (int i = 0; i < parameterTypes.size(); i++) {
            Group argGroup = argGroups.get(i);
            ParameterType parameterType = parameterTypes.get(i);
            args.add(new Argument<>(argGroup, parameterType));
        }

        return args;
    }

    private Argument(Group group, ParameterType parameterType) {
        this.group = group;
        this.parameterType = parameterType;
    }

    public Group getGroup() {
        return group;
    }

    public T getValue() {
        return parameterType.transform(group.getValues());
    }

    public Type getType() {
        return parameterType.getType();
    }

    public ParameterType getParameterType() {
        return parameterType;
    }
}