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16 package org.kuali.common.jdbc;
17
18 import java.io.BufferedReader;
19 import java.io.IOException;
20 import java.util.Arrays;
21 import java.util.List;
22
23 import org.apache.commons.lang3.StringUtils;
24 import org.springframework.util.Assert;
25
26 public class DefaultSqlReader implements SqlReader {
27
28 public static final String DEFAULT_DELIMITER = "/";
29 public static final DelimiterMode DEFAULT_DELIMITER_MODE = DelimiterMode.OWN_LINE;
30 public static final LineSeparator DEFAULT_LINE_SEPARATOR = LineSeparator.LF;
31 public static final List<String> DEFAULT_COMMENT_TOKENS = Arrays.asList("#", "--");
32 public static final boolean DEFAULT_IS_TRIM = true;
33 public static final boolean DEFAULT_IS_IGNORE_COMMENTS = true;
34
35 String delimiter = DEFAULT_DELIMITER;
36 DelimiterMode delimiterMode = DEFAULT_DELIMITER_MODE;
37 LineSeparator lineSeparator = DEFAULT_LINE_SEPARATOR;
38 boolean trim = DEFAULT_IS_TRIM;
39 boolean ignoreComments = DEFAULT_IS_IGNORE_COMMENTS;
40 List<String> commentTokens = DEFAULT_COMMENT_TOKENS;
41
42 @Override
43 public SqlMetaData getMetaData(BufferedReader reader) throws IOException {
44 Assert.notNull(delimiter, "delimiter is null");
45 long count = 0;
46 long size = 0;
47 String line = reader.readLine();
48 String trimmedLine = StringUtils.trimToNull(line);
49 while (line != null) {
50 size += line.length();
51 if (isEndOfSqlStatement(trimmedLine, delimiter, delimiterMode)) {
52 count++;
53 }
54 line = reader.readLine();
55 trimmedLine = StringUtils.trimToNull(line);
56 }
57 SqlMetaData smd = new SqlMetaData();
58 smd.setCount(count);
59 smd.setSize(size);
60 return smd;
61 }
62
63 @Override
64 public List<String> getSql(BufferedReader reader) throws IOException {
65 Assert.notNull(delimiter, "delimiter is null");
66 String line = reader.readLine();
67 String trimmedLine = StringUtils.trimToNull(line);
68 StringBuilder sb = new StringBuilder();
69 while (line != null) {
70 if (isEndOfSqlStatement(trimmedLine, delimiter, delimiterMode)) {
71 return Arrays.asList(getReturnValue(sb.toString() + line, trim, lineSeparator));
72 }
73 if (!ignore(ignoreComments, sb, trimmedLine, commentTokens)) {
74 sb.append(line + lineSeparator.getValue());
75 }
76 line = reader.readLine();
77 trimmedLine = StringUtils.trimToNull(line);
78 }
79
80 String result = getReturnValue(sb.toString(), trim, lineSeparator);
81
82 if (result == null) {
83 return null;
84 } else {
85 return Arrays.asList(result);
86 }
87 }
88
89 protected String getReturnValue(String sql, boolean trim, LineSeparator lineSeparator) {
90 if (StringUtils.endsWith(sql, delimiter)) {
91 int endIndex = sql.length() - delimiter.length();
92 sql = StringUtils.substring(sql, 0, endIndex);
93 }
94 if (trim) {
95 sql = StringUtils.trimToNull(sql);
96 }
97 if (sql == null) {
98 return null;
99 } else if (StringUtils.endsWith(sql, lineSeparator.getValue())) {
100 int endIndex = sql.length() - lineSeparator.getValue().length();
101 return StringUtils.substring(sql, 0, endIndex);
102 } else {
103 return sql;
104 }
105 }
106
107 protected boolean isEndOfSqlStatement(String trimmedLine, String delimiter, DelimiterMode delimiterMode) {
108 switch (delimiterMode) {
109 case END_OF_LINE:
110 return StringUtils.endsWith(trimmedLine, delimiter);
111 case OWN_LINE:
112 return StringUtils.equals(trimmedLine, delimiter);
113 default:
114 throw new IllegalArgumentException("Delimiter mode '" + delimiterMode + "' is unknown");
115 }
116 }
117
118 protected boolean proceed(String line, String trimmedLine, String delimiter, DelimiterMode delimiterMode) {
119 if (line == null) {
120 return false;
121 }
122 boolean endOfSqlStatement = isEndOfSqlStatement(trimmedLine, delimiter, delimiterMode);
123 return !endOfSqlStatement;
124 }
125
126 protected boolean ignore(boolean ignoreComments, StringBuilder sql, String trimmedLine, List<String> commentTokens) {
127 if (!ignoreComments) {
128 return false;
129 }
130 if (!StringUtils.isBlank(sql.toString())) {
131 return false;
132 }
133 boolean isComment = isSqlComment(trimmedLine, commentTokens);
134 return isComment;
135 }
136
137 protected boolean isSqlComment(String trimmedLine, List<String> commentTokens) {
138 for (String commentToken : commentTokens) {
139 if (StringUtils.startsWith(trimmedLine, commentToken)) {
140 return true;
141 }
142 }
143 return false;
144 }
145
146 public String getDelimiter() {
147 return delimiter;
148 }
149
150 public void setDelimiter(String delimiter) {
151 this.delimiter = delimiter;
152 }
153
154 public boolean isTrim() {
155 return trim;
156 }
157
158 public void setTrim(boolean trim) {
159 this.trim = trim;
160 }
161
162 public boolean isIgnoreComments() {
163 return ignoreComments;
164 }
165
166 public void setIgnoreComments(boolean ignoreComments) {
167 this.ignoreComments = ignoreComments;
168 }
169
170 public LineSeparator getLineSeparator() {
171 return lineSeparator;
172 }
173
174 public void setLineSeparator(LineSeparator lineSeparator) {
175 this.lineSeparator = lineSeparator;
176 }
177
178 public DelimiterMode getDelimiterMode() {
179 return delimiterMode;
180 }
181
182 public void setDelimiterMode(DelimiterMode delimiterMode) {
183 this.delimiterMode = delimiterMode;
184 }
185
186 public List<String> getCommentTokens() {
187 return commentTokens;
188 }
189
190 public void setCommentTokens(List<String> commentTokens) {
191 this.commentTokens = commentTokens;
192 }
193
194 }