com.liferay.portal.dao.db.DerbyDB Maven / Gradle / Ivy

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Contains implementation for the portal services.
There is a newer version: 7.0.0-nightly
/**
 * Copyright (c) 2000-2013 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.portal.dao.db;

import com.liferay.portal.kernel.dao.db.DB;
import com.liferay.portal.kernel.io.unsync.UnsyncBufferedReader;
import com.liferay.portal.kernel.io.unsync.UnsyncStringReader;
import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;
import com.liferay.portal.kernel.util.StringBundler;
import com.liferay.portal.kernel.util.StringUtil;

import java.io.IOException;

/**
 * @author Alexander Chow
 * @author Sandeep Soni
 * @author Ganesh Ram
 */
public class DerbyDB extends BaseDB {

	public static DB getInstance() {
		return _instance;
	}

	@Override
	public String buildSQL(String template) throws IOException {
		template = convertTimestamp(template);
		template = replaceTemplate(template, getTemplate());

		template = reword(template );
		//template = _removeLongInserts(derby);
		template = removeNull(template);
		template = StringUtil.replace(template , "\\'", "''");

		return template;
	}

	@Override
	public boolean isSupportsAlterColumnName() {
		return _SUPPORTS_ALTER_COLUMN_NAME;
	}

	@Override
	public boolean isSupportsAlterColumnType() {
		return _SUPPORTS_ALTER_COLUMN_TYPE;
	}

	protected DerbyDB() {
		super(TYPE_DERBY);
	}

	@Override
	protected String buildCreateFileContent(
			String sqlDir, String databaseName, int population)
		throws IOException {

		String suffix = getSuffix(population);

		StringBundler sb = new StringBundler(14);

		sb.append("drop database ");
		sb.append(databaseName);
		sb.append(";\n");
		sb.append("create database ");
		sb.append(databaseName);
		sb.append(";\n");

		if (population != BARE) {
			sb.append("connect to ");
			sb.append(databaseName);
			sb.append(";\n");
			sb.append(getCreateTablesContent(sqlDir, suffix));
			sb.append("\n\n");
			sb.append(readFile(sqlDir + "/indexes/indexes-derby.sql"));
			sb.append("\n\n");
			sb.append(readFile(sqlDir + "/sequences/sequences-derby.sql"));
		}

		return sb.toString();
	}

	@Override
	protected String getServerName() {
		return "derby";
	}

	@Override
	protected String[] getTemplate() {
		return _DERBY;
	}

	@Override
	protected String reword(String data) throws IOException {
		UnsyncBufferedReader unsyncBufferedReader = new UnsyncBufferedReader(
			new UnsyncStringReader(data));

		StringBundler sb = new StringBundler();

		String line = null;

		while ((line = unsyncBufferedReader.readLine()) != null) {
			if (line.startsWith(ALTER_COLUMN_NAME) ||
				line.startsWith(ALTER_COLUMN_TYPE)) {

				line = "-- " + line;

				if (_log.isWarnEnabled()) {
					_log.warn(
						"This statement is not supported by Derby: " + line);
				}
			}
			else if (line.startsWith(ALTER_TABLE_NAME)) {
				String[] template = buildTableNameTokens(line);

				line = StringUtil.replace(
					"alter table @old-table@ to @new-table@;",
					RENAME_TABLE_TEMPLATE, template);
			}
			else if (line.contains(DROP_INDEX)) {
				String[] tokens = StringUtil.split(line, ' ');

				line = StringUtil.replace(
					"drop index @index@;", "@index@", tokens[2]);
			}

			sb.append(line);
			sb.append("\n");
		}

		unsyncBufferedReader.close();

		return sb.toString();
	}

	private static final String[] _DERBY = {
		"--", "1", "0", "'1970-01-01-00.00.00.000000'", "current timestamp",
		" blob", " blob", " smallint", " timestamp", " double", " integer",
		" bigint", " varchar(4000)", " clob", " varchar",
		" generated always as identity", "commit"
	};

	private static final boolean _SUPPORTS_ALTER_COLUMN_NAME = false;

	private static final boolean _SUPPORTS_ALTER_COLUMN_TYPE = false;

	private static Log _log = LogFactoryUtil.getLog(DerbyDB.class);

	private static DerbyDB _instance = new DerbyDB();

}