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Liferay Source Formatter
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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.checks.util;

import com.liferay.petra.string.CharPool;
import com.liferay.petra.string.StringPool;
import com.liferay.portal.kernel.util.StringUtil;
import com.liferay.portal.tools.ToolsUtil;

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

/**
 * @author Hugo Huijser
 */
public class JavaSourceUtil extends SourceUtil {

	public static String getClassName(String fileName) {
		int x = fileName.lastIndexOf(CharPool.SLASH);
		int y = fileName.lastIndexOf(CharPool.PERIOD);

		return fileName.substring(x + 1, y);
	}

	public static String getPackageName(String content) {
		Matcher matcher = _packagePattern.matcher(content);

		if (matcher.find()) {
			return matcher.group(2);
		}

		return StringPool.BLANK;
	}

	public static List getParameterList(String methodCall) {
		String parameters = null;

		int x = -1;

		while (true) {
			x = methodCall.indexOf(StringPool.CLOSE_PARENTHESIS, x + 1);

			parameters = methodCall.substring(0, x + 1);

			if ((getLevel(parameters, "(", ")") == 0) &&
				(getLevel(parameters, "{", "}") == 0)) {

				break;
			}
		}

		x = parameters.indexOf(StringPool.OPEN_PARENTHESIS);

		parameters = parameters.substring(x + 1, parameters.length() - 1);

		return splitParameters(parameters);
	}

	public static boolean isValidJavaParameter(String javaParameter) {
		if (javaParameter.contains(" implements ") ||
			javaParameter.contains(" throws ")) {

			return false;
		}

		if ((getLevel(javaParameter, "(", ")") == 0) &&
			(getLevel(javaParameter, "<", ">") == 0) &&
			(getLevel(javaParameter, "{", "}") == 0)) {

			return true;
		}

		return false;
	}

	public static List splitParameters(String parameters) {
		List parametersList = new ArrayList<>();

		int x = -1;

		while (true) {
			x = parameters.indexOf(StringPool.COMMA, x + 1);

			if (x == -1) {
				parametersList.add(StringUtil.trim(parameters));

				return parametersList;
			}

			if (ToolsUtil.isInsideQuotes(parameters, x)) {
				continue;
			}

			String linePart = parameters.substring(0, x);

			if ((getLevel(linePart, "(", ")") == 0) &&
				(getLevel(linePart, "{", "}") == 0)) {

				parametersList.add(StringUtil.trim(linePart));

				parameters = parameters.substring(x + 1);

				x = -1;
			}
		}
	}

	private static final Pattern _packagePattern = Pattern.compile(
		"(\n|^)\\s*package (.*);\n");

}