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Martini: Core Libraries for Java

There is a newer version: 6.0-JDK12

/*
Copyright 2017 Penny Rohr Curich

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package guru.qas.martini.step;

import java.lang.reflect.Method;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import com.google.common.collect.Ordering;

import gherkin.ast.Step;

@SuppressWarnings("WeakerAccess")
public class DefaultStep implements StepImplementation {

	protected final String keyword;
	protected final Pattern pattern;
	protected final Method method;

	@Override
	public String getKeyword() {
		return keyword;
	}

	@Override
	public Pattern getPattern() {
		return pattern;
	}

	@Override
	public Method getMethod() {
		return method;
	}

	public DefaultStep(String keyword, Pattern pattern, Method method) {
		this.keyword = keyword;
		this.pattern = pattern;
		this.method = method;
	}

	@Override
	public boolean isMatch(Step step) {
		return isKeywordMatch(step) && isTextMatch(step);
	}

	protected boolean isKeywordMatch(Step that) {
		String normalizedThat = getNormalizedKeyword(that);
		int comparison = Ordering.natural().nullsFirst().compare(keyword, normalizedThat);
		return 0 == comparison;
	}

	protected String getNormalizedKeyword(Step step) {
		String keyword = step.getKeyword();
		return null == keyword ? null : keyword.trim();
	}

	protected boolean isTextMatch(Step step) {
		String text = step.getText();
		Matcher matcher = pattern.matcher(text);
		return isMatch(matcher);
	}

	protected boolean isMatch(Matcher matcher) {
		boolean evaluation = false;
		if (matcher.find()) {
			int groups = matcher.groupCount();
			int parameterCount = method.getParameterCount();
			evaluation = groups == parameterCount;
		}
		return evaluation;
	}
}