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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;

import com.liferay.portal.kernel.util.StringBundler;

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

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

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

		_checkTables(fileName, content);

		return content;
	}

	private void _checkColumns(
		String fileName, String tableContent, int startLineCount) {

		Matcher matcher = _columnPattern.matcher(tableContent);

		while (matcher.find()) {
			String columnName = matcher.group(1);

			if (columnName.length() > _MAX_NAME_LENGTH) {
				addMessage(
					fileName,
					StringBundler.concat(
						"Column name '", columnName, "' should not exceed ",
						String.valueOf(_MAX_NAME_LENGTH), " characters"),
					"oracle_naming_rules.markdown",
					startLineCount +
						getLineCount(tableContent, matcher.start()));
			}
		}
	}

	private void _checkTables(String fileName, String content) {
		Matcher matcher = _createTablePattern.matcher(content);

		while (matcher.find()) {
			String tableName = matcher.group(1);

			if (tableName.length() > _MAX_NAME_LENGTH) {
				addMessage(
					fileName,
					StringBundler.concat(
						"Table name '", tableName, "' should not exceed ",
						String.valueOf(_MAX_NAME_LENGTH), " characters"),
					"oracle_naming_rules.markdown",
					getLineCount(content, matcher.start()));
			}

			int x = matcher.end();

			while (true) {
				x = content.indexOf(")", x + 1);

				if (x == -1) {
					return;
				}

				String tableContent = content.substring(matcher.end(), x);

				if (getLevel(tableContent) == 0) {
					_checkColumns(
						fileName, tableContent,
						getLineCount(content, matcher.end()));

					break;
				}
			}
		}
	}

	private static final int _MAX_NAME_LENGTH = 30;

	private final Pattern _columnPattern = Pattern.compile("\n\t*(\\w+) ");
	private final Pattern _createTablePattern = Pattern.compile(
		"create table (\\w+) \\(");

}