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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;

import com.liferay.portal.kernel.util.StringUtil;
import com.liferay.portal.kernel.util.Validator;
import com.liferay.portal.tools.BaseImportsFormatter;
import com.liferay.portal.tools.ImportPackage;

import java.io.IOException;

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

/**
 * @author Hugo Huijser
 */
public class FTLImportsFormatter extends BaseImportsFormatter {

	protected static List getImportsList(String content) {
		List importsList = new ArrayList<>();

		Matcher matcher = _importsPattern.matcher(content);

		while (matcher.find()) {
			importsList.add(matcher.group());
		}

		return importsList;
	}

	@Override
	protected ImportPackage createImportPackage(String line) {
		return createJavaImportPackage(line);
	}

	@Override
	protected String doFormat(
			String content, Pattern importPattern, String packageDir,
			String className)
		throws IOException {

		List importsList = getImportsList(content);

		for (String imports : importsList) {
			content = doFormat(content, packageDir, className, imports);
		}

		return content;
	}

	protected String doFormat(
			String content, String packageDir, String className, String imports)
		throws IOException {

		if (Validator.isNull(imports)) {
			return content;
		}

		String newImports = sortAndGroupImports(imports);

		if (!imports.equals(newImports)) {
			content = StringUtil.replaceFirst(content, imports, newImports);
		}

		content = content.replaceAll(
			"(?m)^([ \t]*package .*;|)\\s*^([ \t]*import)", "$1\n\n$2");

		content = content.replaceAll(
			"(?m)^([ \t]*(?:package|import) .*;)\\s*^([ \t]*/\\*\\*|@|<#)",
			"$1\n\n$2");

		return content;
	}

	private static final Pattern _importsPattern = Pattern.compile(
		"(^[ \t]*import\\s+[^$].*;\n+)+", Pattern.MULTILINE);

}