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1
19
20 package org.netbeans.lexer.gen;
21
22 import java.io.File  ;
23 import java.io.FileWriter ;
24 import java.io.IOException ;
25
26 import org.apache.tools.ant.BuildException;
27 import org.apache.tools.ant.Task;
28 import org.xml.sax.SAXException ;
29
30
35 public abstract class GenerateLanguageSource extends Task {
36
37 private String languageClassName;
38
39 private String lexerClassName;
40
41 private String tokenTypesClassName;
42
43 private File languageDescriptionFile;
44
45 private File languageSourceFile;
46
47 private boolean ignoreTokenTypes;
48
49 private boolean ignoreLanguageDescriptionFile;
50
51 public GenerateLanguageSource() {
52 }
53
54 public String getLanguageClassName() {
55 return languageClassName;
56 }
57
58 public void setLanguageClassName(String languageClassName) {
59 this.languageClassName = languageClassName;
60 }
61
62 public String getLexerClassName() {
63 return lexerClassName;
64 }
65
66 public void setLexerClassName(String lexerClassName) {
67 this.lexerClassName = lexerClassName;
68 }
69
70 public String getTokenTypesClassName() {
71 return tokenTypesClassName;
72 }
73
74 public void setTokenTypesClassName(String tokenTypesClassName) {
75 this.tokenTypesClassName = tokenTypesClassName;
76 }
77
78 public File getLanguageDescriptionFile() {
79 return languageDescriptionFile;
80 }
81
82 public void setLanguageDescriptionFile(File languageDescriptionFile) {
83 this.languageDescriptionFile = languageDescriptionFile;
84 }
85
86 public File getLanguageSourceFile() {
87 return languageSourceFile;
88 }
89
90 public void setLanguageSourceFile(File languageSourceFile) {
91 this.languageSourceFile = languageSourceFile;
92 }
93
94 public boolean getIgnoreTokenTypes() {
95 return ignoreTokenTypes;
96 }
97
98 public void setIgnoreTokenTypes(boolean ignoreTokenTypes) {
99 this.ignoreTokenTypes = ignoreTokenTypes;
100 }
101
102 public boolean getIgnoreLanguageDescriptionFile() {
103 return ignoreLanguageDescriptionFile;
104 }
105
106 public void setIgnoreLanguageDescriptionFile(boolean ignoreLanguageDescriptionFile) {
107 this.ignoreLanguageDescriptionFile = ignoreLanguageDescriptionFile;
108 }
109
110 public void execute() throws BuildException {
111 String langClassName = getLanguageClassName();
112 String lexerClassName = getLexerClassName();
113 String tokenTypesClassName = getTokenTypesClassName();
114 File langDescFile = getLanguageDescriptionFile();
115 File langSrcFile = getLanguageSourceFile();
116
117 if (getIgnoreTokenTypes()) {
118 tokenTypesClassName = null;
119 }
120 if (getIgnoreLanguageDescriptionFile()) {
121 langDescFile = null;
122 }
123
124 if (langClassName == null || "".equals(langClassName)) {
125 throw new BuildException("languageClassName attribute must be set");
126 }
127 if (lexerClassName == null || "".equals(lexerClassName)) {
128 throw new BuildException("lexerClassName attribute must be set");
129 }
130 if (langSrcFile == null) {
131 throw new BuildException("languageSourceFile attribute must be set");
132 }
133
134 if (langDescFile != null && !langDescFile.exists()) {
136 langDescFile = null;
137 }
138
139 String output;
140 try {
141 output = generate(langClassName, lexerClassName,
142 tokenTypesClassName, langDescFile);
143 } catch (SAXException e) {
144 e.printStackTrace();
145 if (e.getException() != null) {
146 System.err.println("Nested exception:");
147 e.getException().printStackTrace();
148 }
149 throw new BuildException(e);
150 } catch (IOException e) {
151 throw new BuildException(e);
152 } catch (ClassNotFoundException e) {
153 throw new BuildException(e);
154 }
155
156 try {
157 FileWriter langSrcWriter = new FileWriter (langSrcFile);
158 langSrcWriter.write(output);
159 langSrcWriter.close();
160 } catch (IOException e) {
161 throw new BuildException("IOException occurred", e);
162 }
163
164 String msg = "Generated language source " + langSrcFile
165 + " based on information from ";
166 if (tokenTypesClassName != null) {
167 msg += "class " + tokenTypesClassName;
168 }
169 if (langDescFile != null) {
170 if (tokenTypesClassName != null) {
171 msg += " and ";
172 }
173 msg += "description in " + langDescFile;
174 }
175
176 log(msg);
177 }
178
179 protected abstract String generate(String langClassName, String lexerClassName,
180 String tokenTypesClassName, File langDescFile)
181 throws ClassNotFoundException , SAXException , IOException ;
182
183 }
184 |
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