001    /**
002     * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
003     *
004     * The contents of this file are subject to the terms of the Liferay Enterprise
005     * Subscription License ("License"). You may not use this file except in
006     * compliance with the License. You can obtain a copy of the License by
007     * contacting Liferay, Inc. See the License for the specific language governing
008     * permissions and limitations under the License, including but not limited to
009     * distribution rights of the Software.
010     *
011     *
012     *
013     */
014    
015    package com.liferay.portal.dao.db;
016    
017    import com.liferay.portal.kernel.dao.db.DB;
018    import com.liferay.portal.kernel.io.unsync.UnsyncBufferedReader;
019    import com.liferay.portal.kernel.io.unsync.UnsyncStringReader;
020    import com.liferay.portal.kernel.util.StringBundler;
021    import com.liferay.portal.kernel.util.StringUtil;
022    
023    import java.io.IOException;
024    
025    /**
026     * @author Alexander Chow
027     * @author Sandeep Soni
028     * @author Ganesh Ram
029     */
030    public class HypersonicDB extends BaseDB {
031    
032            public static DB getInstance() {
033                    return _instance;
034            }
035    
036            public String buildSQL(String template) throws IOException {
037                    template = convertTimestamp(template);
038                    template = replaceTemplate(template, getTemplate());
039    
040                    template = reword(template);
041                    template = StringUtil.replace(template, "\\'", "''");
042    
043                    return template;
044            }
045    
046            protected HypersonicDB() {
047                    super(TYPE_HYPERSONIC);
048            }
049    
050            protected String buildCreateFileContent(
051                    String sqlDir, String databaseName, int population) {
052    
053                    return null;
054            }
055    
056            protected String getServerName() {
057                    return "hypersonic";
058            }
059    
060            protected String[] getTemplate() {
061                    return _HYPERSONIC;
062            }
063    
064            protected String reword(String data) throws IOException {
065                    UnsyncBufferedReader unsyncBufferedReader = new UnsyncBufferedReader(
066                            new UnsyncStringReader(data));
067    
068                    StringBundler sb = new StringBundler();
069    
070                    String line = null;
071    
072                    while ((line = unsyncBufferedReader.readLine()) != null) {
073                            if (line.startsWith(ALTER_COLUMN_NAME)) {
074                                    String[] template = buildColumnNameTokens(line);
075    
076                                    line = StringUtil.replace(
077                                            "alter table @table@ alter column @old-column@ rename to " +
078                                                    "@new-column@;",
079                                            REWORD_TEMPLATE, template);
080                            }
081                            else if (line.startsWith(ALTER_COLUMN_TYPE)) {
082                                    String[] template = buildColumnTypeTokens(line);
083    
084                                    line = StringUtil.replace(
085                                            "alter table @table@ alter column @old-column@ @type@ " +
086                                                    "@nullable@;",
087                                            REWORD_TEMPLATE, template);
088                            }
089                            else if (line.indexOf(DROP_INDEX) != -1) {
090                                    String[] tokens = StringUtil.split(line, " ");
091    
092                                    line = StringUtil.replace(
093                                            "drop index @index@;", "@index@", tokens[2]);
094                            }
095    
096                            sb.append(line);
097                            sb.append("\n");
098                    }
099    
100                    unsyncBufferedReader.close();
101    
102                    return sb.toString();
103            }
104    
105            private static String[] _HYPERSONIC = {
106                    "//", "true", "false",
107                    "'1970-01-01'", "now()",
108                    " binary", " bit", " timestamp",
109                    " double", " int", " bigint",
110                    " longvarchar", " longvarchar", " varchar",
111                    "", "commit"
112            };
113    
114            private static HypersonicDB _instance = new HypersonicDB();
115    
116    }