com.liferay.source.formatter.check.EmptyCollectionCheck Maven / Gradle / Ivy

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.source.formatter.check;

import com.liferay.petra.string.StringBundler;
import com.liferay.portal.kernel.util.StringUtil;
import com.liferay.portal.kernel.util.TextFormatter;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author Hugo Huijser
 */
public class EmptyCollectionCheck extends BaseFileCheck {

	@Override
	protected String doProcess(
		String fileName, String absolutePath, String content) {

		Matcher matcher = _emptyCollectionPattern.matcher(content);

		if (!matcher.find()) {
			return content;
		}

		String replacement = StringBundler.concat(
			"Collections.empty",
			TextFormatter.format(matcher.group(1), TextFormatter.J), "()");

		return StringUtil.replace(content, matcher.group(), replacement);
	}

	private static final Pattern _emptyCollectionPattern = Pattern.compile(
		"Collections\\.EMPTY_(LIST|MAP|SET)");

}