1 /**
2 * Copyright 2006-2012 The Kuali Foundation
3 *
4 * Licensed under the Educational Community License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.opensource.org/licenses/ecl2.php
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.codehaus.mojo.sql;
17
18 import org.codehaus.plexus.util.StringUtils;
19
20 /**
21 * Utility class to split a long sql batch script into single SQL commands.
22 */
23 public class SqlSplitter {
24 /**
25 * Value indicating the sql has no end-delimiter like i.e. semicolon
26 */
27 public static final int NO_END = -1;
28
29 /**
30 * Check if the given sql line contains an end of command ';' Please note
31 * that we do <em>not</em> fully parse the SQL, so if we get a malformed
32 * statement, we cannot detect it.
33 *
34 * @param line
35 * to parse
36 * @param delimiter
37 * which should be used to split SQL commands
38 * @return position after the end character if the given line contains the
39 * end of a SQL script, {@value SqlSplitter#NO_END} if it doesn't
40 * contain an end char.
41 */
42 public static int containsSqlEnd(String line, String delimiter) {
43 // / * * / comments
44 boolean isComment = false;
45
46 boolean isAlphaDelimiter = StringUtils.isAlpha(delimiter);
47
48 if (line == null || line.length() == 0) {
49 return NO_END;
50 }
51
52 int pos = 0;
53
54 do {
55 if (isComment) {
56 if (line.startsWith("*/", pos)) {
57 isComment = false;
58 } else {
59 pos++;
60 continue;
61 }
62 }
63
64 if (line.startsWith("/*", pos)) {
65 isComment = true;
66 pos += 2;
67 continue;
68 }
69
70 if (line.startsWith("--", pos)) {
71 return NO_END;
72 }
73
74 if (line.startsWith("'", pos) || line.startsWith("\"", pos)) {
75 String quoteChar = "" + line.charAt(pos);
76 String quoteEscape = "\\" + quoteChar;
77 pos++;
78
79 if (line.length() <= pos) {
80 return NO_END;
81 }
82
83 do {
84 if (line.startsWith(quoteEscape, pos)) {
85 pos += 2;
86 }
87 } while (!line.startsWith(quoteChar, pos++));
88
89 continue;
90 }
91
92 if (line.startsWith(delimiter, pos)) {
93 if (isAlphaDelimiter) {
94 // check if delimiter is at start or end of line, surrounded
95 // by non-alpha character
96 if ((pos == 0 || !isAlpha(line.charAt(pos - 1)))
97 && (line.length() == pos + delimiter.length() || !isAlpha(line
98 .charAt(pos + delimiter.length())))) {
99 return pos + delimiter.length();
100 }
101 } else {
102 return pos + delimiter.length();
103 }
104 }
105
106 pos++;
107
108 } while (line.length() >= pos);
109
110 return NO_END;
111 }
112
113 /**
114 * @param c
115 * the char to check
116 * @return <code>true</code> if the given character is either a lower or an
117 * upperchase alphanumerical character
118 */
119 private static boolean isAlpha(char c) {
120 return Character.isUpperCase(c) || Character.isLowerCase(c);
121 }
122
123 }